Flipside orchestrates blockchain growth through a powerful mix of data, science and community. We drive measurable market cap growth for blockchain ecosystems, empower analysts with industry-leading data, and empower anyone to earn tokens by shaping the onchain economy.

At the heart of our approach is a proprietary wallet scoring methodology that transforms raw onchain data into actionable growth strategies. This highly quantitative framework drives meaningful ecosystem awareness, acquisition, and activation - and has catalyzed billions in value creation for Flipside partners like Solana, Avalanche, NEAR, Aptos and more.

Founded in 2017, and backed by leading investors like Republic, Galaxy, and True Ventures; Flipside is a remote-first company with a global team of nearly 100. With an energetic community of 180,000 analysts, and dozens of top-tier blockchain partners, growth knows no bounds at Flipside.

About Us

The Data Analytics Team at Flipside Crypto builds cutting-edge analytics products for the blockchain industry. We’re seeking an Analytics Engineer to help expand our analytics capabilities and serve as a bridge between our technical teams and customers.

Position Overview

This is a fully remote position open to international candidates. As an Analytics Engineer, you’ll play a crucial role in designing and implementing data solutions while serving as a subject matter expert for blockchain analytics.

Core Responsibilities

• Design and implement data models using dbt and SQL for blockchain data analysis
• Create comprehensive analytics product specifications and metric definitions
• Develop and maintain data pipelines for both on-chain and off-chain data sources
• Collaborate with Data Product team on initiatives
• Mentor team members on blockchain data analysis best practices
• Collaborate with Product and Data Science teams to define analytical requirements
• Contribute to the development of standardized blockchain data frameworks

Required Qualifications

• 3+ years of experience working with complex data sets
• Demonstrated expertise in blockchain data structures and analysis
• Advanced SQL skills, particularly with modern data warehouses (Snowflake, Athena, etc.)
• Proficiency in dbt and data modeling (star schema, dimensional modeling)
• Strong background in ETL pipeline development
• Excellent problem-solving abilities and analytical mindset

Technical Skills

• Data Warehousing: Snowflake, Athena, Hive, PostgreSQL, SQL Server
• Data Modeling: dbt, dimensional modeling, star schema
• Domain Knowledge: Blockchain protocols, smart contracts, DeFi metrics
• Programming: SQL (required), Python (bonus)

Soft Skills

• Outstanding written and verbal communication
• Self-directed project management capabilities
• Ability to thrive in ambiguous environments
• Strong collaboration and mentorship abilities
• Excellent stakeholder management

What Sets You Apart

• Experience with multiple blockchain protocols
• Contributions to blockchain analytics open-source projects
• Background in DeFi or crypto-native companies
• Experience working with real-time blockchain data

Company description

Balancer is an open-source DeFi protocol built on the Ethereum network (including many L2s). It is a base-layer AMM (Automated Market Maker) and DEX (Decentralized Exchange). Built on the Ethereum blockchain, Balancer offers new solutions to the problems of traditional and centralized exchanges. Developers leverage Balancer as a permissionless building block to innovate freely and create new liquidity solutions. Balancer’s mission is to become the primary source of DeFi liquidity by providing the most flexible and powerful platform for programmable liquidity.

Where does Balancer fit in DeFi?

High-level job description

Balancer has just launched its v3 protocol. V3 makes the Balancer protocol much more flexible and developer-friendly. The team you will join will build the canonical consumer interface to interact with the v3 Balancer protocol. We’re looking for people that have a strong user-focused mindset with an interest in solving the new problems that exist in the Web3 space. You’re comfortable working in an open-source environment with lots of moving pieces, give attention to detail, and have a curiosity for learning new technologies and systems.

You will:

• Build user-facing experiences for accessing and interacting with the Balancer protocol.
• Work closely with designers, engineers, and other product owners in the Balancer ecosystem.
• Be responsible for planning and architecting new and existing systems that tie together the various elements that make up a Web3 app in a clean and modular way.

You may be a fit for this role if you:

• Have extensive experience working in JavaScript/TypeScript-based systems.
• Have extensive experience working with React/NextJS.
• Experience as a core member of a software development team with significant contributions.
• An interest or passion for working on DeFi protocols.
• Have some experience with Wagmi/Viem, GraphQL and Solidity, but these are not essential.

The ideal candidate will probably be a mid-level to senior frontend developer who is either of the following:

• A React/NextJS developer with Web3 experience (+++)
• A React/NextJS developer without Web3 experience but has used DeFi extensively (++)
• A React/NextJS developer with an interest in Web3 (+)

If you’re excited about this role but do not meet 100% of the qualifications listed above, we encourage you to apply.

More about this role

• Fully remote, the whole Balancer team is remote, and there is no office.
• Open-source, current production app
• Tech stack:
  • NextJS
  • TypeScript
  • Turbopack (monorepo)
  • Vercel
  • react-query
  • Wagmi/Viem
  • ChakraUI
  • Vitest/Playwright

Perks

• Competitive salary + token incentives
• Flexible PTO
• At least two on-sites (in-person meetups) per year
• Experience at leading DeFi protocol
• With a remote team all over the world, you can work from wherever you want!
• Wellness & co-working stipends plus phone and internet reimbursements

What are we all about?

We are a team of builders and researchers on a mission to empower enterprises and developers worldwide to access and build on decentralized systems.

Our expertise covers several domains: Ethereum and Starknet protocol engineering, layer-2, AI, cryptography research, protocol research, decentralized finance (DeFi), security auditing, formal verification, real-time monitoring, smart contract development, and dapps and enterprise engineering.

Working to solve some of the most challenging problems in the blockchain space, we frequently collaborate with renowned companies, such as Ethereum Foundation, Starknet Foundation, Gnosis Chain, Flashbots, Forta Protocol, Lido, EigenLayer, Open Zeppelin, RISCZero, Aleph Zero, and many more.

Today, we are a 350+ strong team working remotely across 66+ countries.

Are you the one?

An ideal candidate is a researcher who actively participates in debates about L1 and L2 designs, systemic risks, and consensus algorithms by writing academic papers, blog-posts, or fora entries.

Candidates should be able to work in a distributed research team, express their research ideas clearly, and know how to argue their findings formally. We appreciate candidates who are not afraid of voicing their opinions and motivate them or ask for explanations of concepts they are not familiar with.

Responsibilities:

As a protocol researcher, you will participate in research on, for example:

• L2 designs
  • Prover coordination and sequencer design, decentralization, incentivization.
  • Levels of finality.
  • L2 governance, PoS vs PoG.
  • Auctioning the right to build a block.
• Various flavors of staking: vanilla staking, restaking, liquid staking, and systemic risks they come with.
• Consensus algorithms
  • What are the advantages and disadvantages of the known consensus protocols? When a given protocol work well, and when does it not?
  • How do we incentivize participants in the consensus algorithms?
  • How finality in consensus algorithms is achieved?

Must haves:

• A strong understanding of distributed protocol design. Particularly, a demonstrable ability to identify the trade-offs faced by protocols when deployed on blockchains.
• Ability to identify mechanism design problems and propose solutions.
• Familiarity with Ethereum: how it works and why?
• Familiarity with various designs of L2s.
• Ability to express thoughts precisely.

Nice to haves:

• Knowledge about cryptography, or
• Knowledge about game theory.
• Published work in relevant fields, blog posts and forum posts also count.

This is a fully remote role, with flexibility to work on a erse range of projects, and opportunities to attend leading global conferences in the field. Some of Nethermind Research’s past work includes:

• Fiat-Shamir Security of FRI and Related SNARKs
• Systematization of Knowledge for Decentralized Identities and Verifiable Credentials
• Attributable Consensus Solution for DV clusters
• Threshold Signature Schemes
• A DEX design with user privacy

Perks and benefits:

• Fully remote

• Flexible working hours

• Plus equity

• Discord

• LinkedIn

• Twitter

About us

Arrakis is the leading non-custodial, onchain market making solution for protocols and DAOs. Our customers include Ether.fi, Maker, Stargate, Across, Lido, Karpatkey and other industry leaders.

We believe in a world where every organization, from a small startup to a large enterprise, will be tokenized and traded onchain. For this world, Arrakis is building the tools to create the necessary liquidity to enable this token economy to rival and out-compete the traditional financial industry.

DeFi is at risk itself of being overcome by centralised actors however. As Ethereum’s DeFi ecosystem has become more complex, sophisticated actors have extracted more and more value known as MEV. Arrakis is working on next generation solutions at the speartip of the MEV supply chain, such as HOT AMM, to protect LPs and token issuers against this value extraction.

The role

As one of the Front End engineers at Arrakis, we’re looking for someone who is hands on but also has strong product thinking skills. Although shipping is important, this role entails more than writing lines of code. You’ll be involved in discovery work and ensuring that we build user-centred solutions that can scale.

What things will look like:

• You’ll be deeply involved in crafting delightful user experiences.
• You’ll play an instrumental role in architecting our systems, working with our current FE engineer, CTO (co-founder), back end engineers, smart contract developers and product manager.
• You’ll be heavily involved in product discovery work.
• We prioritise learning and shipping. We keep processes minimal.
• You won’t burn time in pointless meetings. We run a planning call on Mondays and do demos on Fridays. We have ad hoc working sessions and do daily async written updates.

Requirements

• Strong proficiency in React and Next.js ecosystems
• Hands on experience with Web3 technologies (wagmi, viem, Rainbowkit)
• Extensive experience with ReactQuery for efficient data fetching and state management
• Advanced knowledge of Typescript, including complex type definitions and best practices
• Expertise in modern CSS frameworks, particularly Tailwind CSS
• Demonstrated experience in monorepo architecture and management
• Strong understanding of CI/CD principles and experience implementing robust pipelines

Technologies we use and teach:

• React.js, Vue.js, Web3 Tooling, Typescript, GraphQl, NodeJS

Benefits

Join a small yet mighty team of industry veterans focused on revolutionizing crypto market making, collaborating with major projects like MakerDAO, Uniswap, Aave, Lido. You’ll work fully remotely with members spanning Zug, London, Paris, New York, Berlin, and San Francisco. Arrakis is backed by world-class investors including Uniswap Labs, Robot Ventures, Accel, Longhash, and more.

What we offer:

• Competitive salary
• SPICE token package
• Remote work
• Join amazing quarterly in-person offsites all over the world

The liquidity must flow…

Reown is looking to hire a QA Tester to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

https://www.alephbeta.org/jobs/tech-lead

Hello! My name is Eitan and I'm the current Technical Lead at Alephbeta.org. Due to personal reasons, I'm stepping down. I absolutely love Aleph Beta and want to ensure it is left in good hands. So I’m doing something unconventional: I’m taking responsibility to find my successor.  I'm actively searching for a passionate, driven inidual to take the reins of this exciting role. This isn’t your typical job description; I'm here to give you an inside look at exactly what you'll be doing, just as I have been doing to this day.

Core Technologies You'll Work With:

1. TypeScript/Node.js
2. JavaScript and React
3. Next.js
4. Docker
5. PostgreSQL and Redis
6. OpenSearch/Elasticsearch
7. BullMQ (job queue)

Infrastructure You'll Manage:

1. Our systems mostly run on AWS and are managed through Terraform, incorporating services like ECS, Lambda, Cloudwatch, and RDS.
2. We use CircleCI for our continuous integration and deployment pipeline.

Mobile Apps:

1. Android app built with Kotlin
2. iOS app developed using Swift

Your Daily Routine:

1. Reviewing pull requests
2. Pair programming and designing solutions with direct reports
3. Managing your team's work/tickets and providing status updates
4. Taking on DevOps tasks like releasing, debugging, and scaling
5. Seizing opportunities for inidual contributions, including hands-on coding
6. Occasionally ing into data analysis

Less Frequent but Crucial Tasks:

1. System architecture design
2. Roadmap planning to align on future goals
3. Sync meetings to foster leadership alignment
4. Participating in the hiring process
5. Feedback and team building

Why This Position is Exceptional:

1. Full Ownership: You’ll own the tech stack top to bottom. Your decisions will steer our course.
2. Collaborative Excellence: Your manager and partner in crime will be a former Palantir product manager that has been, for me, one of the most exceptional teammates I've ever known.
3. Wide Range of Technologies: You’ll support our five senior engineers, getting hands-on across all platforms and technologies—Next.js, React, Node.js, Android Kotlin, iOS Swift, Postgres, AWS infrastructure, and more.
4. Strategic Position: Be part of strategic planning meetings where you'll help shape the direction of the company and product at the highest level.
5. Fully Remote: Our organization is fully remote, allowing you the freedom to work from anywhere that is most comfortable for you. 

Ideal candidates will be adept at leading a team of developers, a masterful software architect, and an excellent communicator. In our startup environment, you'll wear many hats, and no two days will look the same.

During the onboarding process, I'll pass on all my knowledge to you and remain available for any one-off queries even after my departure.

About Aleph Beta: Aleph Beta is a growing non-profit media company producing high quality animated Torah videos and podcasts for teenagers and adults. We believe that Torah is meant to be our guide, but we don’t always know exactly how. No one reads the Bible like it’s a self-help manual, right? Aleph Beta’s mission is to read the text closely, and to discover, in surprising ways, how the Torah isn’t just a rulebook, but a guidebook, one that has profound wisdom that is relevant and meaningful in our everyday lives.

Aleph Beta is unique in that it is technically a non-profit, but we are run as a startup. Our operating budget comes from over twelve thousand paying subscribers, who we commit to providing an excellent learning experience. Working here affords you unique opportunities to hone your skills in a lean environment, focus on growth in what is essentially a SaaS business, and feel good about what you do for a living.

At Aleph Beta, we believe that a phenomenal product experience is key to unlocking exponential growth in usage. We are looking for a tech lead who can partner with our product management lead to build and drive that vision to reality.

To succeed in this role, you should have the following skills and experience:

• 5+ years of SW development experience (Preferred full stack experience, preferred familiarity with Typescript/Javascript and React, familiarity with mobile app development, a plus)
• Excellent English communication verbal and written
• MS or Bachelor’s degree in software engineering/computer science/information systems 
• Experience in management, a plus

Ready to Lead Our Technical Vision? If you're excited about combining technical leadership with meaningful impact, we'd love to talk. Share your CV with us at [email protected], including a note on your approach to technical leadership and why you're interested in leading our team at Aleph Beta. We're looking forward to meeting the person who will help shape the future of Torah education through technology.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), ART (UTC -3), UTC -4, UTC -4:30, UTC -3, UTC -2, SBT (UTC +11), GMT (UTC +0), CET (UTC +1), EET (UTC +2), MSK (UTC +3), AST (UTC -4), FKST (UTC -3), NST (UTC -3:30)

The Company

SimplyAnalytics is a powerful spatial analytics and data visualization application used by thousands of business, marketing, and social science researchers in the United States and Canada. It comes pre-packaged with 200,000+ data variables and allows our users to create maps, charts, tabular reports, and crosstabs. We are passionate about creating outstanding software, and we believe in test driven development, continuous integration, and code review.

As a smaller company, each of our developers has an important role to play - at SimplyAnalytics, you are not just another cog in the wheel, you are an integral member of our team. You will be working on valuable features and making key decisions that impact the direction of the product and our users. In addition, we provide an excellent work-life balance, with 100% remote work, 20 personal days off, flexible work hours, a collaborative work environment, and quarterly “professional development days” to explore and share your interests with the rest of the team.

**The Role

The ideal candidate has experience working on complex single-page applications, is a self-starter, has a high level of attention to detail, is comfortable asking questions, enjoys working with talented colleagues, and has an interest in analytics and data visualization.

We are a 100% remote company. Our employees can live and work anywhere in Canada, the United States, Mexico, Central America, South America, or Europe. This is a full-time salaried position. When applying, please include a cover letter.

Responsibilities:

• Design, develop, and test features, both in-house and customer-facing
• Write modern high-quality, clean, scalable, and maintainable code
• Contribute ideas for new features or improvements to existing features
• Assist colleagues through code-review, collaboration, and troubleshooting

Required:

• 8+ years of professional software development experience on large, structured code bases using vanilla JavaScript (this is not a React, Angular, Node.js, or full-stack position)
• Strong UI development skills (CSS & HTML)
• Open to learning new technologies
• Self-starter who gets things done
• Attention to detail

Bonus:

• Experience implementing data tables, charts, graphs, or other data visualizations
• Experience working on complex analytics, data visualization, or mapping applications
• D3.js experience
• MapLibre GL JS or Mapbox GL JS experience
• Experience with geospatial, demographic, business, marketing, or health data
• Experience with TypeScript
• Comfortable using Linux CLI

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1. Deliver Seamless, Scalable Front-End Solutions: Use React and React Native to create applications that are not only visually appealing but highly performant, ensuring a seamless user experience across both web and mobile platforms. 
   • Key Responsibilities: 
     • Design and implement React components with a focus on reusability and performance.
     • Integrate third-party APIs into applications, ensuring smooth data flows.
     • Collaborate with cross-functional teams to refine user requirements and technical specifications.
2. Drive Innovation and Optimization: Ensure applications are optimized for speed and performance. Proactively identify and resolve performance bottlenecks and scale apps as needed. 
   • Key Responsibilities: 
     • Apply performance optimization techniques such as lazy loading, code splitting, and memory optimization.
     • Suggest and implement new technologies or approaches to enhance application performance.
3. Foster Collaboration and Mentorship: Be a proactive mentor within the development team, helping other developers grow while collaborating on best practices and innovative solutions. 
   • Key Responsibilities: 
     • Lead code reviews and provide constructive feedback to team members.
     • Participate in knowledge-sharing sessions and contribute to a learning culture.

**

• You have a strong passion for front-end development and technical excellence
• You thrive in environments that demand high collaboration and teamwork
• You see challenges as opportunities to innovate and grow
• You're constantly learning, whether it's new technologies or refining your process
• You value writing clean, maintainable code and helping others do the same

**

• Proficiency in english as it is the common language between all employees.
• Strong expertise in React and React Native for web and mobile development.
• Proficiency in JavaScript (ES6+), HTML5, and CSS3.
• Experience with TypeScript for type-safe React applications.
• Experience with state management tools such as Redux or Context API.
• Proven experience with React Router for navigation and AJAX or fetch for API integration.
• Knowledge of server-side rendering (e.g., Next.js) and progressive web apps (PWAs).
• Familiarity with unit testing frameworks like Jest and React Testing Library.
• Experience with Version Control using Git and workflows (e.g., GitHub, GitLab).
• Solid understanding of responsive design principles and techniques.

**

• Familiarity with GraphQL for querying data.
• Exposure to CI/CD pipelines for React applications (e.g., Jenkins, CircleCI).

**

• Strong problem-solving skills and attention to detail.
• Ability to collaborate effectively in a remote team environment.
• Excellent communication skills, particularly for explaining technical concepts to non-technical stakeholders.
• Strong time management skills and the ability to meet deadlines while maintaining high-quality code.
• A passion for learning new technologies and staying updated with industry trends.
• Ability to mentor other developers and share knowledge within the team.

We're growing quickly, which means you'll face interesting technical challenges and have real opportunities to shape our future. If you're excited about building meaningful solutions while growing with a collaborative team, we'd love to talk.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10)

At Vanta, our mission is to secure the internet and protect consumer data. We believe that security should be monitored and verified continuously, and we empower companies to practice better security and prove it with ease. Vanta has a kind and talented team, and while some have prior security experience, many have been successful at Vanta without it. 

Vanta’s product monitors the security posture for thousands of companies, pulling tens of millions of API calls of data per day, pushing information from hundreds of thousands of laptop agents, and running tests against that data continuously to identify potential security threats. Our frontend infrastructure and tooling need to stay ahead of exponential growth in our customer base. As a Senior Software Engineer at Vanta, you’ll be responsible for setting technical direction to provide a strong foundation for our frontend stack and enable our infrastructure to scale with our business. You will also drive complex projects across our technical stack and mentor our talented engineering team. Your past experience will be leveraged to enable and accelerate Vanta’s growth.

Our business has found incredible product-market fit and has monetized effectively since the day we signed our first customer. We’re growing at a blistering pace, which presents career-defining opportunities for engineers to accelerate their growth and to contribute to a rapidly-scaling company.

Vanta has a kind and talented team, and while some have prior security experience, many have been successful at Vanta without it. We’d love for you to join us!

What you’ll do as a Senior Software Engineer, Full Stack (Product Platform) at Vanta:

Vanta’s Product Platform team’s mission is to enable Vanta teams to efficiently build products and experiences for our customers. With a full stack focus, you will tackle challenging and highly impactful user facing challenges that have a company-wide impact. You and your team empower other Vanta engineers to leverage cutting-edge technologies and best practices to make Vanta more performant and scalable on a platform level. Example projects include creating a foundation for enabling fine grained authorization across the entire product and creating Vanta’s first centralized task feed for the logged in user. 

You will also:

• Lead complex projects with multiple stakeholders and engineers to enable our business and team to scale
• Advocate for product quality and collaborate with product engineering teams on cross cutting features 
• Work with talented and kind engineers to make a significant impact on our customer base, enabling them to improve their security and prove it
• Contribute to building Vanta’s engineering culture as we grow

How to be successful in this role:

• Have an interest in learning about security or prior experience in the space
• Have 6+ years of experience with full stack development, delivering customer facing components that are used by multiple product teams
• Prior experience on a platform team
• Have experience with frontend infrastructure challenges related to scale, reliability, or performance
• Experience with GraphQL, Typescript and React, and are familiar with frontend technologies
• Have worked on technical initiatives aimed towards web performance, product platform, frontend infrastructure, or developer productivity

What you can expect as a Vantan:

• Industry-Competitive Salary and Equity
• 100% covered Medical, Dental, and Vision Benefits with Dependents Coverage
• 16 Weeks Fully Paid Parental Leave for All New Parents (Moms, Dads, Adoptive, Foster)
• Health & Wellness Stipend
• Remote Workspace Stipend
• 401(k) Matching Plan
• Flexible Work Hours and Location
• Open & Encouraged PTO Policy
• 12 Company Paid Holidays
• Free Memberships to Online Wellness Platforms (One Medical, Ginger, Headspace, and more!) 
• Virtual Team Building Activities, Lunch and Learns, and other Company-Wide Events
• Offices in SF and NYC with Hubs of Vantans forming across the US, including but not limited to, Seattle, Austin, Indianapolis, LA, Boston, and more! 

At Vanta, we are committed to hiring erse talent of different backgrounds and as such, it is important to us to provide an inclusive work environment for all. We do not discriminate on the basis of race, gender identity, age, religion, sexual orientation, veteran or disability status, or any other protected class. As an equal opportunity employer, we encourage and welcome people of all backgrounds to apply.

Wikimedia Foundation is hiring a remote Staff Software Security Engineer (PHP). This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Wikimedia Foundation - The non-profit that operates Wikipedia.

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**

**

**

1. Deliver Seamless, Scalable Front-End Solutions: Use React and React Native to create applications that are not only visually appealing but highly performant, ensuring a seamless user experience across both web and mobile platforms. 
   • Key Responsibilities: 
     • Design and implement React components with a focus on reusability and performance.
     • Integrate third-party APIs into applications, ensuring smooth data flows.
     • Collaborate with cross-functional teams to refine user requirements and technical specifications.
2. Drive Innovation and Optimization: Ensure applications are optimized for speed and performance. Proactively identify and resolve performance bottlenecks and scale apps as needed. 
   • Key Responsibilities: 
     • Apply performance optimization techniques such as lazy loading, code splitting, and memory optimization.
     • Suggest and implement new technologies or approaches to enhance application performance.
3. Foster Collaboration and Mentorship: Be a proactive mentor within the development team, helping other developers grow while collaborating on best practices and innovative solutions. 
   • Key Responsibilities: 
     • Lead code reviews and provide constructive feedback to team members.
     • Participate in knowledge-sharing sessions and contribute to a learning culture.

**

• You have a strong passion for front-end development and technical excellence
• You thrive in environments that demand high collaboration and teamwork
• You see challenges as opportunities to innovate and grow
• You're constantly learning, whether it's new technologies or refining your process
• You value writing clean, maintainable code and helping others do the same

**

• Proficiency in english as it is the common language between all employees.
• Strong expertise in React and React Native for web and mobile development.
• Proficiency in JavaScript (ES6+), HTML5, and CSS3.
• Experience with TypeScript for type-safe React applications.
• Experience with state management tools such as Redux or Context API.
• Proven experience with React Router for navigation and AJAX or fetch for API integration.
• Knowledge of server-side rendering (e.g., Next.js) and progressive web apps (PWAs).
• Familiarity with unit testing frameworks like Jest and React Testing Library.
• Experience with Version Control using Git and workflows (e.g., GitHub, GitLab).
• Solid understanding of responsive design principles and techniques.

**

• Familiarity with GraphQL for querying data.
• Exposure to CI/CD pipelines for React applications (e.g., Jenkins, CircleCI).

**

• Strong problem-solving skills and attention to detail.
• Ability to collaborate effectively in a remote team environment.
• Excellent communication skills, particularly for explaining technical concepts to non-technical stakeholders.
• Strong time management skills and the ability to meet deadlines while maintaining high-quality code.
• A passion for learning new technologies and staying updated with industry trends.
• Ability to mentor other developers and share knowledge within the team.

We're growing quickly, which means you'll face interesting technical challenges and have real opportunities to shape our future. If you're excited about building meaningful solutions while growing with a collaborative team, we'd love to talk.

About Vac

Vac builds public good protocols for the decentralized web. We do applied research based on which we build protocols, libraries and publications.

The role

We are seeking an experienced Distributed Systems Evaluation Engineer to join the Vac DST team. This role focuses on rigorously assessing the performance and reliability of IFT projects at scale. You’ll be responsible for designing and executing comprehensive evaluation strategies, leveraging both large-scale lab deployments and protocol behavior modeling scripts. Your expertise will be crucial in analyzing these complex distributed systems, automating intricate test scenarios, and providing in-depth insights into system behaviors.

Working closely with cross-functional teams, you’ll troubleshoot complex issues and translate technical data into actionable recommendations. Proficiency in containerization, cloud technologies, and distributed systems principles is essential.

This position offers the opportunity to make a significant impact on the robustness and scalability of IFT projects, contributing to the development of next-generation decentralized technologies.

Key responsibilities

• Design, implement, and maintain sophisticated tools for analyzing distributed systems at scale, ensuring robust and efficient testing processes.
• Orchestrate and automate large-scale deployments to rigorously validate the functionality, performance, and scalability of complex distributed systems.
• Identify, document, reproduce, and troubleshoot intricate issues in distributed environments, collaborating closely with IFT project teams to resolve challenges.
• Develop a comprehensive understanding of IFT project protocols and components to provide insightful analyses that drive improvements and inform decision-making.
• Conduct and interpret statistical analyses of system outputs, translating complex data into actionable insights for stakeholders.
• Create and maintain scripts that model protocol behavior, utilizing these models to validate and sanity-check large-scale deployment runs.
• Work with Docker, Kubernetes, and POSIX-like systems

You ideally will have

• Solid experience with scripting languages like Python.
• Experience with statistical analysis tools, like pandas, seaborn.
• Experience with systems programming languages like Nim, Go, Rust.
• Understanding of network behaviors (libp2p, gossipsub, p2p networks).
• Working knowledge of Docker, Kubernetes, and POSIX-like systems.
• Excellent written and conversational communication skills.
• Alignment with our core values and principles.

Bonus points

• Experience with off-the-shelf networking stacks such as libp2p.
• Experience in blockchain technology.
• Experience working for an open-source organization.

Hiring process

• Interview with our POps team
• Interview with team member from the Vac DST team
• Take home assignment & interview with team member from the Vac DST team
• Interview with Vac team lead

At cLabs, our mission is to create financial building blocks that empower everyone in the world to save, spend, and innovate with money. cLabs is a technical powerhouse and product incubator dedicated to the Celo ecosystem.

Celo is a Layer-1 blockchain - moving to being a Layer-2 on Ethereum soon - that aims to remove the barriers for large-scale adoption of cryptocurrencies as means-of-payment. Using a novel address-based encryption algorithm, the Celo protocol makes sending money as easy as sending a text. Additionally, Celo uses stable-value tokens pegged to fiat currencies, like the US Dollar, to minimize volatility. Celo is an open protocol enabling many to participate in the system, even with a budget Android smartphone.

cLabs is seeking a Smart Contracts Engineer to join our Contracts Team. As part of the contracts team you will help design and develop Celo’s core smart contracts and help develop best practices and processes to ensure those smart contracts are secure. This includes our governance, proof of stake, stability mechanisms, and the decentralized identity system.

You Will:

• Write production-level code in Solidity and Typescript
• Gather requirements from Engineering Partners and other key internal and external stakeholders (e.g. Celo Validators, Celo Stakeholders) in order to determine and implement changes to our core primitives, including smart contracts and tooling.
• Collaborate with third party Smart Contract Auditors to ensure the quality assurance of the proposed changes as they go through our smart contract release process
• Work on releases end-to-end: from specifications, to design, ship and maintain.

You Have:

• At least 4 years of experience in software engineering primarily working in Javascript, Typescript.
• At least 1 - 2 years of experience in Solidity programming and using development frameworks like Foundry, Hardhat or viem.
• Prior experience in deploying complex smart contract systems to a public blockchain (e.g. Ethereum)
• Solid knowledge of the Ethereum Virtual Machine (EVM).
• Passion for blockchain technology and Celo’s mission
• Experience working with cloud-based platforms including AWS, Azure, or Google Cloud Platform
• Experience with CI/CD pipelines and the Software Development Life Cycle (SDLC)

Nice to Have:

• BONUS: low-level working experience.
• BONUS: You have experience working with third party smart contract auditors such as OpenZeppelin, Certora
• BONUS: You have worked on a smart contract system that have processed high dollar volume amount
• BONUS: You have knowledge of past and common smart contract exploits and know how to avoid them

cLabs (“Celo Labs”) started Celo in 2017 and is one of many contributors to the open source project Celo. cLabs builds financial technology to enable prosperity of all beings.

To build technology and products that are used and loved by people and solve real-world problems, we need to build a team with many different perspectives and experiences. We are an equal opportunity employer and value ersity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status. We encourage candidates from all backgrounds to apply and always consider qualified applicants with arrest and conviction records, in accordance with the San Francisco Fair Chance Ordinance.

"

Skills: Python, PyTorch, Strong Math Background (e.g. working with Black-Scholes), Data Wrangling

In this role, you will be responsible for improving our optimization strategies, our price forecasting models, and adapting them to prospective projects so we know how much to offer in terms of rent. Good ideas are not guaranteed to translate into improvements, so it is important to communicate your hypotheses clearly and document your results carefully.

These systems require us to collect data from various sources and run models live, so you will be required to write production-ready code that interfaces with often unreliable data sources. I.e. There is a significant Software Engineering component in addition to the Research component.

",

Du liebst Herausforderungen und möchtest Teil eines innovativen Teams sein? Wie wäre es, wenn du dich unserem großartigen internationalen Team anschließt und deine Ideen in spannenden Projekten verwirklichst?

Wir bieten dir die Chance, remote zu arbeiten oder dich nach erfolgreicher Zusammenarbeit in unserem modernen Headquarter in Dubai weiterzuentwickeln. Arbeite mit den Besten, gestalte die Zukunft der Finanztechnologie und bring deine Fähigkeiten auf das nächste Level. Gemeinsam schaffen wir Innovationen, nehmen Herausforderungen an und entwickeln Lösungen, die einen Unterschied machen.

Klingt das nach deinem perfekten Arbeitsumfeld? Dann lass uns herausfinden, ob wir zusammenpassen!

Aufgaben

• Entwicklung und Optimierung von Finanztechnologien: Du wirst unsere bestehenden Systeme und Anwendungen im Bereich Börse und Trading weiterentwickeln und optimieren.

• Backend- und Frontend-Entwicklung: Je nach Spezialisierung wirst du an der Weiterentwicklung unserer Trading-Plattformen und Analyse-Tools beteiligt sein.

• Automatisierung von Prozessen: Entwicklung von Automatisierungen für Datenverarbeitung und Analyse, um effizientere Arbeitsabläufe zu ermöglichen.

• Arbeiten mit APIs: Integriere externe Datenquellen (Börsendaten, Finanzmarktinformationen) und entwickle APIs für den effizienten Datenaustausch.

• Problemanalyse und Debugging: Behebe technische Fehler und stelle sicher, dass alle Systeme fehlerfrei laufen.

Qualifikation

• Erfahrung in der Softwareentwicklung: Du hast mindestens 2-3+ Jahre Berufserfahrung in der Entwicklung von Software, idealerweise im Bereich Fintech, Börse oder Trading.

• Technische Fähigkeiten: Du beherrschst gängige Programmiersprachen und Frameworks wie Python, Java, C++, JavaScript, Go, SolidJS, React oder ähnliche Technologien.

• Kenntnisse in Datenbanken: Du hast Erfahrung in der Arbeit mit Datenbanken (SQL, NoSQL) und bist in der Lage, große Datenmengen effizient zu verwalten.

• Erfahrung mit APIs und Automatisierung: Du hast bereits APIs entwickelt oder mit ihnen gearbeitet und kennst dich mit der Automatisierung von Prozessen aus.

• Kenntnis der Finanzwelt/Trading: Ein Interesse und Verständnis für Börse, Finanzmärkte und Trading-Prozesse sind von Vorteil.

• Eigenständige Arbeitsweise: Du arbeitest selbstständig und bist in der Lage, Projekte zuverlässig und termingerecht umzusetzen.

• Sprache: Wir sind ein deutschsprachiges Team, deshalb ist es uns wichtig, dass auch du deutsch sprichst

Benefits

• Dynamisches Arbeitsumfeld: Arbeite in einem ambitionierten Team mit flachen Hierarchien.

• Weiterentwicklungsmöglichkeiten: Du wirst in spannende Projekte eingebunden, die deine Fähigkeiten fordern und erweitern.

• Remote-Arbeit möglich: Flexible Arbeitszeiten und die Möglichkeit, remote zu arbeiten.

• Zugang zur Finanzwelt: Arbeite direkt an der Schnittstelle von Technologie und Finanzmärkten.

VideoAmp is hiring a remote Senior Data Engineer. This is a full-time position that can be done remotely anywhere in the United States.

VideoAmp - Measurement & optimization for data-driven advertising.

N1 is looking to hire a Distributed Systems PhD Internship to join their team. This is an internship position that can be done remotely anywhere in the United States or on-site in New York NY, or San Francisco CA.

About Rapidcode

Rapidcode is a forward-thinking software development company dedicated to building scalable SaaS solutions for businesses worldwide. We partner with companies to transform their ideas into innovative software products that drive growth and efficiency. Our team thrives on collaboration, cutting-edge technology, and delivering exceptional results for our clients.

We’re seeking an experienced Backend Developer with expertise in browser automation, bot development, Puppeteer/Playwright, and reverse engineering of APIs to join our team on a contract basis. In this role, you’ll work independently to design and deliver robust backend solutions, taking ownership of requirements from concept to implementation. You’ll thrive in an environment where you can define and tackle tasks autonomously, solving complex problems and shipping impactful products with minimal guidance.

**

• Develop Advanced Automation Solutions: Build and maintain scalable browser automation tools and bots using Node.js, TypeScript, and frameworks like Puppeteer or Playwright.
• Reverse Engineer APIs: Analyze and integrate APIs by reverse engineering and understanding undocumented or private endpoints.
• Solve Complex Problems: Tackle challenges independently, turning high-level requirements into working solutions without needing detailed tickets.
• Ship Quality Products: Write clean, efficient, and maintainable code, ensuring high performance and reliability of the solutions you develop.
• Collaborate and Innovate: Contribute ideas and improvements that elevate the quality and efficiency of our projects, while working effectively within a team when needed.

**

• Experienced Professional: You have 5+ years of experience in backend development with a strong focus on browser automation, bot development, and API integration.
• Technical Proficiency: Advanced knowledge of Node.js, TypeScript, Puppeteer, Playwright, and tools related to browser automation and data extraction.
• Reverse Engineering Skills: Proven ability to analyze, understand, and reverse engineer APIs, with experience handling CAPTCHAs, proxies, and session management.
• Independent Problem Solver: You excel at working independently, defining tasks, and delivering results without needing micromanagement.
• Communication and Collaboration: Strong verbal and written communication skills, with the ability to contribute effectively in a team environment when required.
• Attention to Detail: A commitment to producing high-quality work, focusing on reliability, accuracy, and performance.
• Self-Motivated: You are proactive in managing your workload, meeting deadlines, and driving projects forward.
• Preferred Background: A Bachelor’s degree in Computer Science, Engineering, or a related field is a plus.

**

• Back End: Node.js, TypeScript, Puppeteer, Express.js
• Databases: PostgreSQL, MongoDB
• DevOps: Docker, Kubernetes, AWS, CI/CD Pipelines
• Tools: Git, Slack, GitHub, ClickUp

Twilio is hiring a remote Developer Evangelist, Ecosystem. This is a full-time position that can be done remotely anywhere in India.

Twilio - Build the future of communications.

Hegemony Labs is looking for a Senior Frontend Engineer to develop a feature rich, intuitive user interface that effectively encompasses our automated trading protocol. Collaborating and clearly communicating with our development team to deliver a thoroughly tested and well-architected product is essential. We seek a self-motivated inidual who is extremely detail-oriented, passionate about streamlining user experience, and able to adapt to the dynamics of a fast-paced startup environment. The ideal candidate must effectively navigate complexity, embrace challenges as if they are opportunities for growth, and persevere through troublesome tasks to drive the project forward.

Requirements:

• 4-5 years of professional experience with JavaScript frameworks such as React & Nextjs
• Proven experience in frontend development with strong skills in JavaScript, HTML, and CSS.
• Familiarity with blockchain libraries and tooling such as WAGMI and Ethers.js
• A strong track record of collaborating with designers to build sophisticated design systems
• Proven experience developing responsive, high-performance apps for both mobile and desktop platforms
• Strong web design sense and an understanding of user experience fundamentals.
• Fluency in English (both written and verbal).

Good to Have:

• Familiarity with the complete web stack, including protocols and web server optimization techniques.
• Experience building Telegram integrated front ends and/or mini apps

Key Roles:

• Utilize web technologies (React, TypeScript, HTML, CSS) to create MVPs and run experiments that validate ideas, iterating rapidly and adopting new tools as necessary.
• Development of user-facing applications that incorporate complex feature sets, including control panels for trade automation, position dashboards, trading strategy libraries, governance platforms, and various other sub menus.
• Work with the founding team to conceptually iterate, tailor fit, and troubleshoot the unique concepts, capabilities, and vision of the project within prototype front-ends.
• Plan and discuss with QA team to ensure optimal prioritization of bug fixes and feature additions.
• Keep detailed notes about issues, necessary updates, and key concepts presented during development meetings.
• Design, develop, test, deploy, maintain, and enhance software.
• Introduce innovative ideas and technologies into our platform, driving continuous improvement.
• Ensure security, performance, and accessibility are built into the core of everything you develop.
• Guide the team on browser support, integration testing, and performance optimization.
• Mentor junior frontend developers on proven methodologies, best practices, and industry conventions.

Who we are:

Hegemony Labs is an ambitious startup composed of DeFi natives, trend analysts, and technical experts. We are dedicated to delivering bleeding edge trading innovations for the betterment of Web3 at large. Funded and backed by notable VCs and angels.

What we are building:

Hedgemony is an intent-centric execution layer which blends multilayered aggregation services with AI-driven market insights to provide an enriched and unified on-chain experience. Our primary aim is to simplify DeFi interactions and empower traders with unmatched on-chain trading functionalities.

We deliver simultaneous asset swaps, multi faceted yield capture, copy trading, and hedging optionality through our infinitely customizable strategy agents. Users can configure agents to navigate DEXs, lending, yield-bearing protocols, and other derivatives synchronously via conditional triggers and adaptive logic. With one simple action, entire portfolios can be revamped, redelegated, and programmed to automatically rebalance in accordance to shifting market sentiments.

The protocol MVP is currently deployed on Arbitrum One, and currently working towards multi-chain expansion and integration for crosschain settlement compatibilities on Base, Monad, HyperEVM and beyond.

Additional Info:

• Website
• Docs

How to Apply:

Send us an email at [email protected]. Please include your name, resume or CV, three professional references, and a concise statement about what distinguishes you and why you would be a great addition to our team.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), AST (UTC -4), NST (UTC -3:30)

Contra is looking for a Freelance Frontend Engineer to join our team. In this role, you'll be responsible for building intuitive and interactive user interfaces that improve our platform. 

Responsibilities:

• Develop and maintain user-facing features: Build responsive, accessible, and visually appealing interfaces using modern frontend technologies (e.g., React or similar frameworks).
• Collaborate across teams: Work closely with designers and backend engineers to translate design mockups and functional requirements into seamless user experiences.
• Ensure technical feasibility of designs: Review UI/UX designs for technical feasibility and provide feedback to ensure smooth integration.
• Optimize for performance: Continuously improve applications to ensure fast load times, scalability, and smooth performance across different devices and browsers.
• Contribute to code quality: Participate in code reviews, share best practices, and help improve our codebase by ensuring maintainability and adherence to coding standards.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), AST (UTC -4), NST (UTC -3:30)

Contra is seeking a Web Developer to join our team on a freelancing basis. We are a dynamic networking platform that empowers users to work independently and connect with opportunities that match their skills and interests. The ideal candidate will have a strong understanding of web development technologies and a passion for creating exceptional user experiences.

Responsibilities

• Collaborate with our team to develop and maintain web applications that meet user needs.
• Ensure the technical feasibility of UI/UX designs.
• Optimize applications for maximum speed and scalability.
• Troubleshoot and debug to optimize performance and user experience.
• Stay up-to-date with emerging technologies and industry trends.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), AST (UTC -4), NST (UTC -3:30)

Contra is seeking a skilled Fullstack Engineer to join our team. We are a networking platform that empowers iniduals to work independently, offering them the freedom and opportunities they need. The ideal candidate will contribute to building and maintaining our platform, ensuring an exceptional user experience.

Responsibilities

• Develop and maintain web applications using modern frameworks and technologies.
• Collaborate with designers and product managers to create seamless user interfaces.
• Ensure the performance, quality, and responsiveness of applications.
• Identify and correct bottlenecks and fix bugs.
• Help maintain code quality, organization, and automation.

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), AST (UTC -4), NST (UTC -3:30)

Join Contra as a Framer Developer and play a crucial role in enhancing our networking platform. We are looking for a talented developer who can create and optimize interactive user interfaces and experiences, contributing to our mission of empowering independent work.

Goals that you'll achieve

• Develop and implement interactive components using Framer
• Collaborate with the design team to bring creative concepts to life
• Optimize code for maximum performance across a range of devices
• Ensure the technical feasibility of UI/UX designs
• Maintain and enhance existing features on the platform

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), AST (UTC -4), NST (UTC -3:30)

Contra, a dynamic networking platform empowering users to work independently, is seeking an experienced Webflow Developer. The ideal candidate will collaborate with our team to enhance our online presence, creating a seamless and engaging user experience.

Deliverables:

• Design and develop responsive Webflow templates for our website.
• Collaborate with the design team to implement cohesive and aesthetically pleasing layouts.
• Ensure the website is optimized for speed and scalability.
• Troubleshoot and resolve any Webflow-related issues promptly.
• Maintain up-to-date documentation of all development processes.

"

Skills: Python, AWS, REST, Data Analysis

Apply if you are:

* A generalist comfortable getting projects from 0 to 1

In this role, you will help productionize (and potentially own) our battery optimization software and create prototypes for prospective opportunities. You can’t get closer to the business logic than that because these projects inform how the battery runs and how much we are willing to pay (in rent) for new batteries!

",

Squarespace is hiring a remote Staff Software Engineer, Frontend – Websites. This is a full-time position that can be done remotely anywhere in the United States.

Squarespace - The all-in-one solution for anyone looking to create a beautiful website.

Pond is pioneering blockchain’s foundational models by leveraging graph deep learning to predict on-chain behaviors and accelerate the development of AI-powered, crypto-native applications. Its solutions target key sectors including DeFi, social networks, trading, MEV, and security, utilizing an innovative, decentralized AI development process.

The technical team brings extensive expertise from leading graph AI companies such as WeChat, TigerGraph, and Yuga Labs. With a remarkable track record of over 40 publications in prestigious journals and conferences—such as IEEE, Nature, Harvard Business Review, ICML, NeurIPS, CVPR, and PNAS—the team is at the forefront of cutting-edge AI research and application.

Our $7.5M seed round is led by Archetype, with participation from Cyber Fund (Lido founder’s fund, which rarely invests directly, backed Solana pre-seed and Ethereum pre-ICO), Coinbase Ventures, Delphi Digital and Anagram (the fund of Solana’s president and former president of Polychain).

We have a 30+ wide range of angels in DeFi, MEV, social, security, and more including the co-founder of Near, the co-founder of ENS, CTO of Exo Labs, co-founders of Plume Network, COO of Matrixport, the Head of Market Research of Flashbots, the founder of Mamori, the founder of SEDA, former GP of Variant—Spencer Noon, the founder of Zerion, the founder of Nuffle, the founder of OpenGradient, and others.

For more:

• Website
• Twitter

The role:

We are seeking a skilled and passionate Smart Contract Engineer to join our innovative blockchain team. The ideal candidate will have proven experience in developing and deploying smart contracts and be deeply familiar with blockchain technologies. As a Blockchain Smart Contract Engineer, your main task is to develop, test, and maintain smart contracts on different blockchains according to business needs.

Key Responsibilities:

• Design, develop, test, and deploy smart contracts on blockchain platforms such as Ethereum, Base, or Solana.
• Collaborate with the development team to create and implement decentralized applications (DApps).
• Write high-quality, secure, and sustainable code for blockchain applications.
• Perform code reviews and provide constructive feedback to peers.
• Maintain and optimize existing blockchain applications and smart contracts.
• Work closely with project managers and other stakeholders to define and achieve project goals.
• Stay updated with the latest blockchain technologies and cryptographic methods.
• Contribute to the architecture and design decisions for blockchain systems.

Required Skills and Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• 2+ years of experience in blockchain development.
• Strong proficiency in Solidity and other smart contract languages.
• Experience with blockchain development frameworks and tools (e.g., Truffle, Hardhat, Remix).
• Understanding of consensus algorithms and blockchain protocols.
• Knowledge of front-end technologies (e.g., HTML, CSS, JavaScript) for DApp integration.
• Experience with version control systems, preferably Git.
• Excellent problem-solving skills and ability to work under pressure.

Preferred Skills:

• Familiar with Solidity language, and preferably have some understanding of Rust.
• Familiarity with off-chain storage solutions and integrations (IPFS, The Graph).
• Understanding of Layer 2 scaling solutions (e.g., Optimism, Arbitrum).
• Contributions to open-source blockchain projects.
• Prior experience in a fintech environment.

Supra is looking to hire an Applied Cryptography Associate to join their team. This is a contract position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Mercury is hiring a remote Senior Frontend Engineer - Personal Banking. This is a full-time position that can be done remotely anywhere in Canada or the United States.

Mercury - Banking built for startups.

Time zones: EST (UTC -5), SBT (UTC +11), GMT (UTC +0), MSK (UTC +3), CEST (UTC +2), BST (UTC +1), JST (UTC +9), CST (UTC +8), WIB (UTC +7), MMT (UTC +6:30), BST (UTC +6), NPT (UTC +5:45), IST (UTC +5:30), UZT (UTC +5), IRDT (UTC +4:30), GST (UTC +4)

Lock23, Position Description

Senior Full-Stack Engineer: Next.js, Postgresql, Supabase

Contract: Full time contract. Hiring will include a 3-month trial. You have to be registered as self-employed in your jurisdiction and do your own taxes.

Compensation: Competitive salary and benefits ( 30k - 48k USD ).

Where: The position is location independent and 100% remote, but requires 2 hours of daily availability for calls during UTC+7 business hours (Thailand) and 4h of availability for calls with UTC+1 business hours (Portugal)

Overview:

As Senior Full-Stack engineer you would be leading the design and implementation of the entire application. Data security is the first priority and not an afterthought. This is a senior role in which you will not be micro  managed but work in tandem with one other developer.

We offer competitive rates and considerable growth potential, flexible working hours/location, and the  opportunity to become an expert in a major sustainability field. Expect rewarding work, on a team that enjoys doing it.

The Role and Responsibilities:

(i) Designing, Implementation and Security: Much of your work will centre around designing implementing and maintaining our code base. You will take executive decisions and write highly secure, well documented and scalable code with best practises in mind. As we are are handling extremely sensitive supply chain data you need to – in plain English - know what you are doing follow best practises laid out by OWASP.

(ii) Third party API-integration: You are skilled in building API bridges and know how to integrate 3rd party data sources safely into an application.

(iii) Exploring frontier markets. Lock23 is constantly involving and growing. We are interested in solving more and more highly complex supply chain problems in the future and we need your ability to conceptualise IT solutions to facilitate this. You should therefore have an interest to read technical documents about the REC market to thoroughly understand and discover problems that need solving.

Minimum Qualifications:

Most Important Skills:

Nice to Have:

How to Apply:

Please send the following materials, in PDF format, to [email protected]

(i) Cover Letter describing your interest and qualifications for the position.

Notes to Applicants:

Equal opportunity. Lock23 is an equal opportunity employer. Your age, race, ethnicity, religion, gender,

Time zones: EST (UTC -5), MST (UTC -7), ART (UTC -3), UTC -4, UTC -4:30, UTC -3, UTC -2

**

The wholesale distribution industry is ready for a revolution, and Proton is leading the charge. The world relies on distributors to sell nearly every physical product, but despite its massive contribution to the global economy, this industry has been left behind in terms of technology. Proton is changing that. With AI-powered sales software, we’re breaking through the complexity of selling millions of products and making it easier for distributors to anticipate customer needs. Our mission is to bring the distribution industry into the modern age and the results speak for themselves. Distributors using Proton see 10x ROI, faster new hire ramp-up, and happier sales teams.

In 2022, we raised a $20M Series A backed by Felicis Ventures (investors in Twitch, Shopify, Opendoor, and many others) and Battery Ventures. This year, we’re laser-focused on driving customer growth. If you’re excited about the opportunity to wear multiple hats, and continuously learn and experiment, now’s the time to join the Proton team.

**

Proton is looking for an experienced Senior Backend Engineer to join our fast-growing SaaS team! Reporting directly to the Director of Engineering, the Senior Backend Engineer will drive the technical development of the Proton.ai product and platform. In this role, you will be working with the engineering team to help us build a scalable, customizable, performant and secure application.

We're looking for someone technical with a deep understanding and curiosity of modern tech stacks and systems that will help us choose and implement solutions that benefit the future of our engineering.  

Proton collaborates with Oyster HR to hire international employees as full time (long term) contractors within our company.

Gross Salary range is $50,000 - $70,000  USD annually, based on experience level.

What you’ll do:

• Feature Development: Spearhead the backend coding of new features while helping the Product team understand complexity and tradeoffs. Developing across the entire full stack of our product, driving features from idea to production and rapidly delivering value to our customers that makes a real impact.

• Team Collaboration: Be part of a cross-functional team, including software engineering, infrastructure, backend, frontend, and devops, to provide architectural guidance, making sure the stack decisions being made support our future growth. 

• Enterprise Customizability: Leverage your experience with enterprise applications to tailor our solutions to the unique needs of our corporate customers.

• Performance and Reliability: Share your expertise in building high-performance, reliable applications, contributing to end-to-end architecture and data flow discussions.

• *You'll be a great fit for this role if:**

• Proven experience as a principal engineer or similar in startup environments, with a focus on building scalable SaaS solutions. 7+ years of experience building and deploying scalable SaaS applications

• 5+ years of experience with backend technologies preferably Python or Go, but C# or Java are acceptable

• Track record of successful product architecture decisions and system improvements with a large focus on secure coding practices and standards to meet the needs of enterprise class customers and their data.

• Deep understanding of cloud-native technologies and concepts such as cloud providers, databases, application performance, scalability and security

• Curiosity for new technologies. You’re someone who actively seeks to stay informed about the latest frameworks, software advancements, and tools utilized by industry peers. You like contrasting and comparing technologies to find why one fits better for certain use-cases than the other. 

• Experience with enterprise applications is highly preferred.

• Exceptional communication skills for conveying complex technical concepts to erse stakeholders.

**

Backend

• Elasticsearch & Redis as the main databases
• Actively migrating to SQL as primary database 
• API service in Python running in Kubernetes 
• Daily pre-computations run in Airflow 
• Machine learning 
•  AI models - neural networks 
•  Machine Learning Eng focused on experimenting with ways to improve existing models, building new models - training and developing models and deploying them 

Frontend

• Vue.js 3/Nuxt 3
• Migrating Vue Component frameworks from ElementPlus/iView to Vuetify
• Docker and kubernetes to deploy 
• Github Actions for CI

While we have a well-established tech stack, we welcome highly skilled developers who are passionate about learning and expanding their skill set. Don't have experience with everything listed here, but eager to learn? If so, we encourage you to apply!

**

• Competitive Salaries + Company Stock Options - we want to pay you well (and equitably!) and make you feel like an owner.  
• Flexible Schedule - we think high levels of autonomy, responsibility, and working asynchronously foster an amazing workplace.
• Biannual Company Paid Off-sites - time for us to be together, brainstorm, and make magic happen.

Levridge Inc. is a leading ag-tech firm specializing in providing transformative business technology solutions for the agricultural enterprise built on the cloud-based Microsoft platform. Leveraging cutting-edge technology and industry expertise, Levridge empowers agribusinesses to streamline operations, drive efficiency, and optimize performance.  With a portfolio of innovative solutions, including a pioneering SaaS platform for managing equity at cooperatives, Levridge is committed to revolutionizing the agricultural industry. We play as hard as we work, we embrace every opportunity to learn and share our success. What are you waiting for? Join us! Learn more about Levridge at www.levridge.comLevridge is looking for a highly motivated, honest, and passionate Developer who wants to help develop our team. We're creating industry-shaping IP to help agriculture businesses take advantage of the robust infrastructure that Microsoft Dynamics provides. We're looking for someone with development experience in X++ or in .NET.   This role will be instrumental in the hands-on configuration, implementation, support, and optimization of Levridge commodity and ag sales modules. This position is available on a REMOTE basis in the United States.A Day in the Life* Meet with project or product teams to understand their requirements* Develop integrations between systems to meet product and project needs* Modify or create forms, reports, tables or custom logic in X++ according to requirements within the time allotted by the estimates provided* Document features developed* Work with functional consultants and product managers to understand business processes and requirements* Relay status updates as needed to project managers and other team members* Write blogs on development topics to contribute to the Levridge blog* Explain technical features to functional team members* Unit test customizations and product features* When needed, build modifications for clients according to the designs outlining the features and within the time allotted by the estimates provided* Assist product managers and functional consultants with technical questions related to gathering, defining, and documenting requirements* Foster and champion psychological safety and a positive team environmentPreferred Qualifications* 2+ years of experience programming in Dynamics 365 Finance & Operations or 3+ years of experience in .NET* Bachelor’s Degree in Information Technology, Business, Computer Science or related field or equivalent work experience* Certifications in Dynamics platform* Basic understanding of Dynamics platform functionality* Familiarity with version control tools* Experience with Visual Studio* Ability to write statements querying a SQL database * Ability to work in a team environment and independently * Willing to constantly update oneself on new software and market conditions * Ability to communicate effectively in both spoken and written EnglishTravel Required: Incumbent is expected to periodically meet with client teams across the United States and will be asked to attend industry events from time to time.Compensation* Our philosophy is to provide compensation that is Competitive, Equitable, and Driven by Performance.  Various factors impact our pay ranges including market conditions and national salary data. To determine competitive salaries within this range we consider candidates skills, qualifications, and experience. These are national ranges, inclusive of bonus opportunities and could represent multiple role levels.US (USD): $80,000 - $110,000Health and Wellness* Medical Insurance (premiums for employees paid for by the company)* Dental Insurance* Vision insurance* 401(k) contribution program (US) or RRSP Benefits (Canada)* Life insurance* Disability Benefits* Paid parental leave* Paid flexible time off* Paid sick time (US) or floater days (Canada)* Paid holidays* Flexible work schedules* Mobile/internet reimbursement* Employee and family assistance program* Learning and development allowance* Employer charitable contribution* Social wellness clubs* Paid business mileage* Home office and wellness allowance (US Only)* HSA contribution (US Only)We live and breathe our core values:Integrity | Technical Excellence | Tenacity | Client Centric | Enjoy Our Work They are the fabric of our company and a reflection of our organizational culture. Our values are a part of our talent acquisition process, how we operate our company and how we partner with our clients. We enjoy our work by exhibiting our technical excellence and tenacity while being inherently client-centric with integrity toward every customer engagement.We will comply with local guidelines regarding infectious diseases and vaccine requirements.  Team members who are required to travel to client sites, conferences and events that are not in Levridge/Stoneridge Software offices, must comply with the client's COVID-19 policies and procedures or have an approved exemption. We are committed to creating a erse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status and all the other fascinating characteristics that make us unique. We acknowledge that iniduals from marginalized communities are statistically less likely to apply to a position that they don’t meet all of the qualifications for. We encourage these iniduals to apply. Growing the best team is at the center of our strategic plan. To be successful in this, we strive to create an inclusive environment and build a sense of belonging by celebrating our differences and ensuring fair and equitable treatment for all our team members.  #Salary and compensation

Time zones: EST (UTC -5), CST (UTC -6), MST (UTC -7), PST (UTC -8), AKST (UTC -9), HST (UTC -10), ART (UTC -3), UTC -4, UTC -4:30, UTC -3, UTC -2

**

**

**

Motia is an open-source, event-driven framework that orchestrates multi-language “Steps” into dynamic Flows. Our Workbench helps developers visualize, debug, and refine these flows, while MotiaHub is our enterprise production platform—enabling one-command deployments, advanced observability, environment management, and versioning.

We’re a driven startup, setting out to unify everything from business process automation to AI-based agent flows under a single, event-driven architecture. We value:

• Ownership & Accountability – Inspired by authors like Jocko Willink, we prioritize iniduals who take genuine ownership of their work and see tasks through—even when it’s not easy.
• Embracing Challenges – Echoing JFK, We choose to do this, not because it is easy, but because it is hard, because that goal will serve to organize and measure the best of our energies and skills.
• Pragmatic Decision Making – As a fast-moving company, we make smart tradeoffs while staying focused on delivering robust, high-impact solutions.

**Role Overview

You’ll split your time between Open Source Core + Workbench and MotiaHub’s production-facing features and DevOps architecture:

Open Source, Workbench & MotiaHub

• Strengthen our Node/TypeScript engine, ensuring seamless cross-language “Step” integrations (Python, Ruby, etc.).
• Enhance the React + Vite-based Workbench UI for better visualization, debugging, and the upcoming AI/agent workflows.

MotiaHub, DevOps & Production

• Web Application front and back end for hosting, deployment, observability, etc
• Drive orchestration (AWS, Kubernetes, or similar).
• Improve CI/CD pipelines, implement environment versioning.
• Collaborate on advanced environment strategies—multi-tenant staging, ephemeral test setups, secure multi-environment deployments, and real-time cluster management.

**

• Core: Open Source Framework: Implement a new cross-runtime “Step” runner so devs can incorporate AI logic seamlessly.
• Workbench: Improve open source React-based flow visualizations—e.g., better node grouping and advanced logging insights.
• Hub: Design secure, zero-downtime deployment flows for enterprise customers.
• DevOps: Tune automated QA checks, add new performance instrumentation, and ensure container updates integrate smoothly with minimal downtime.

**

• Professional Experience:
  • Minimum of 5 years in software development, with a focus on full-stack development and DevOps practices.
  • Proven experience in managing Linux-based infrastructures and Linux/Unix administration.
  • Demonstrated experience in leading software engineering teams and managing complex projects.
• Technical Skills:
  • Proficiency in Node.js and TypeScript, with experience in integrating multiple programming languages such as Python and Ruby.
  • Strong front-end development skills using React and Vite, including experience in building intuitive user interfaces.
  • Expertise in cloud services, particularly AWS, including Infrastructure as Code (IaC) tools like CloudFormation and Terraform.
  • Hands-on experience with containerization technologies like Docker and orchestration tools such as Kubernetes.
  • Proficiency in building and maintaining CI/CD pipelines, with tools like Jenkins, GitLab CI, or CircleCI.
  • Strong scripting skills in languages such as Python, Perl, or Ruby for automation purposes.
• Open-Source Contributions:
  • Active participation in open-source projects, with a demonstrable history of contributions.
  • Experience in collaborating within open-source communities, including code submissions, issue tracking, and peer reviews.
  • Familiarity with open-source development workflows and tools, such as Git and GitHub.
• AI-First Development:
  • Experience in integrating AI capabilities into software applications from the ground up, ensuring intelligent and adaptable solutions.
  • Understanding of machine learning models and their application in enhancing software functionality.
  • Ability to design systems that leverage AI to improve user experience and operational efficiency.
• AI-Driven Workflow Automation:
  • Proven experience in implementing AI-powered workflow automation tools to streamline business processes.
  • Familiarity with AI workflow automation platforms such as Zapier, Make, or Microsoft Power Automate.
  • Ability to design and deploy AI-driven solutions that enhance productivity and reduce manual intervention.
• DevOps Expertise:
  • Experience in designing and implementing secure automation solutions for development, testing, and production environments.
  • Ability to manage and maintain system architecture, ensuring scalability and reliability.
  • Familiarity with monitoring and observability tools to ensure system performance and availability.
• Soft Skills:
  • High Ownership: You approach tasks like you’re the owner. You proactively solve problems and don’t pass the buck.
  • Hard Work & Drive: You thrive when challenges are steep, whether it’s scaling an AI-based system or orchestrating complex containers in production.
  • Pragmatism: You know when to refactor for the long haul and when to be mindful of immediate milestones—especially in a startup environment.

**

• Team Unity: We openly discuss design ideas, share code reviews, and celebrate each other’s wins.
• Fearless Exploration: We’re not satisfied with typical solutions. We push boundaries with AI agent flows, concurrency, and advanced automation.
• Real-World Impact: Both Motia Core (open source) and MotiaHub (production) are used by teams solving tough problems. Your work can influence entire ecosystems.

**

• Shape the Future: Be part of a young platform bridging open-source collaboration with enterprise-scale needs (AI, advanced orchestration, etc.).
• Ownership & Growth: You won’t be a cog. You’ll get to design, build, and see your changes deliver real outcomes—fast.
• Respect for Craft & Balance: We believe in building robust systems. At the same time, we make practical decisions to move forward as a startup.
• Open Source Impact: Your code is in the open, benefiting from and contributing to a global developer community.

**

• Email your resume/GitHub/portfolio to [email protected] with “Senior Full-Stack/DevOps” in the subject.
• In a short note, tell us about a tough challenge you tackled (technical or otherwise), what you learned, and how you owned that outcome.

Are you a talented Senior Developer looking for a remote job that lets you show your skills and get decent compensation? Look no further than Lemon.io — the marketplace that connects you with hand-picked startups in the US and Europe.

What we offer:

• Earn $5k—$10,4k monthly: the rate depends on your seniority level, skills and experience. We've already paid out over $11M to our engineers.
• No more hunting for clients or negotiating rates — let us handle the business side of things so you can focus on what you do best.
• We'll manually find the best project for you according to your skills and preferences.
• Choose a schedule that works best for you. It’s possible to communicate async or minimally overlap within team working hours.
• We respect your seniority so you can expect no micromanagement or screen trackers.
• Communicate directly with the clients. Most of them have technical backgrounds. Sounds good, yeah?
• We will support you from the time you submit the application throughout all cooperation stages.
• Most of our projects involve working in a fast-paced startup environment. We hope you like it as much as we do.
• Through our community, we will connect you with the best developers from more than 50 countries.

Requirements:

• 4+ years of software development experience.
• 3+ years of commercial experience with React.js.
• 3+ years of commercial experience with Python AND/OR 4+ years of experience with Node.js.
• For React & Python Developer: hands-on experience with Next.js, PostgreSQL would be a plus, 3+ years of experience with AWS and TypeScript is a must
• For React & Node Developer: hands-on experience with AWS, Next.js, TypeScript is a must.

• Strong technical skills: as a Senior Developer, you are expected to be able to create projects from scratch and have a deep understanding of application architecture.
• Clear and effective communication in English — advanced ability to discuss business tasks, justify decisions, and communicate issues. Good self-presentation is also essential for upcoming client calls.
• Strong self-organizational skills — ability to work full-time remotely with no supervision.
• Reliability — we want to trust you and expect that you won’t let us and the client down.
• Adaptability and Flexibility — the ability to onboard the project promptly after accepting it and start delivering results quickly.

Sounds good for you? Apply now and join the Lemon.io community!

NOT YOUR TECH STACK?

We have different projects for Senior Developers, so if you have 4+ years of commercial experience in software development and you are fluent with AI Engineering, Python & Node.js, we would be happy to communicate and provide you with a project that matches your experience. Just apply, and we will share more details with you.

If your experience matches our requirements, be ready for the next steps:

• VideoAsk — watch a short video about our startup, up to 10 minutes
• Complete your profile on our website
• 30-minute screening call
• Technical interview
• Feedback
• Magic Box (we are looking for the best project for you).

P.S. We work with developers from 50+ countries in different regions: Europe, LATAM, Asia (Philippines, Indonesia), Oceania (Australia, New Zealand, Papua New Guinea), Canada, and the UK. However, we have some exceptions.

At the moment, we don’t have a legal basis to accept applicants from the following countries:

• European: Iceland, Liechtenstein, Kosovo, Belarus, Russia, and Serbia.
• Latin America: Cuba and Nicaragua
• Most Asian countries and Africa.

We expand and shorten the list of exemptions regularly.

Do you represent a company with engineers who match the description and want to collaborate with us through staff augmentation? Then register here.

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

👀 No monitoring system

🚫 No politics at work

🎅 We hire old (and young)

👋 We’re looking for a backend engineer to join us in building Amondo, an audience engagement platform for global brands including the Olympics, New Balance and Live Nation.

(We’re also looking for a frontend engineer - see our other job post!)

The Role

We’re looking for an experienced backend engineer to support our ambitious development roadmap.

As part of a small, dynamic engineering team of five, you’ll play a key role in building a platform used by some of the world’s most iconic companies, including Fortune 500 brands. You’ll collaborate closely with the founder, product team, and designers to develop innovative backend features, refine infrastructure, and ensure our platform meets the highest standards of scalability and reliability.

This is an exciting opportunity to join a fast-growing, innovative startup at a pivotal stage of its journey.

What we value

The ideal developer for Amondo is someone who is a self-starter, understands the product deeply, is confident engaging with stakeholders, can plan their work and communicates proactively with the team.

Autonomy: The ability to work independently, make informed decisions and manage time effectively.

Communication: Strong communication skills are essential at every level. Developers should communicate clearly and concisely with team members, customers and other stakeholders, keeping everyone informed of progress, challenges and solutions.

Technical competency: Possesses strong technical skills to efficiently tackle complex problems, execute tasks efficiently and deliver high-quality results.

What you'll do

• Design and develop new platform features, including a GraphQL API for internal dashboards, user-facing APIs, media transformation pipelines and server infrastructure.
• Optimise and enhance development processes and workflows to boost efficiency and team productivity.
• Implement robust monitoring and analytics tools to improve the observability, reliability and performance of our services.
• Ensure smooth transitions between platform iterations, maintaining backward compatibility and seamless user experiences.
• Conduct R&D on GPT-powered features and traditional “smart” algorithms to drive innovation and expand platform capabilities.

The tech

• Node.js, NestJS, Cucumber.js, GraphQL, PostgreSQL, Turborepo, pnpm
• Docker, Sentry, Grafana, GitHub Actions
• AWS, S3, Render, Heroku, PostHog
• GitHub, Slack, Notion, Linear
• Frontend: React, Remix, Tailwind, Vite, Jest, Cypress, Storybook, Radix, Chromatic

About you

• Strong, demonstrable working experience with PostgreSQL and GraphQL
• Confident working with AWS and Heroku
• TDD, Git and CI development experience
• Awareness of best DevOps practices
• Experience working in a lean startup environment
• Enjoy using modern collaboration tools - Linear, Notion, GitHub
• Not afraid to work with frontend part of the product
• Bonus: Experience working with third-party APIs including Instagram, Twitter/X Facebook, YouTube and Spotify
• Bonus: Experience with Cloudinary, SendGrid, RabbitMQ, Infosec, S3+CloudFront

What we offer

• Interesting and challenging work
• Work remotely, no commuting to the office
• 4 day work week
• 5 weeks of paid vacation
• Flexible work hours
• Employee autonomy
• Annual international team retreats
• Other perks in the pipeline

Equal opportunities

We value ersity and believe success comes from teams where everyone can be their authentic selves. We welcome applicants from underrepresented backgrounds and are committed to an inclusive, non-discriminatory environment for all.

The application process

1. Submit your application via the form (with an optional video submission)
2. A call with the founder to discuss the company, mission and team
3. A call with one/some of our engineering team to discuss stack and processes
4. A paid trial project - which will give both sides a hands-on opportunity to get to know each other

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

🏖 Paid time off

📆 4 day workweek

🏔 Company retreats

💰 Profit sharing

👀 No monitoring system

👋 We’re looking for a frontend engineer to join us in building Amondo, an audience engagement platform for global brands including the Olympics, New Balance and Live Nation.

(We’re also looking for a backend engineer - see our other job post!)

The Role

We’re looking for an experienced React developer to support our ambitious development roadmap.

As part of a small, dynamic engineering team of five, you’ll play a key role in building a platform used by some of the world’s most iconic companies, including Fortune 500 brands. You’ll be responsible for developing new user-facing features using elegant and scalable UI components, as well as collaborating closely with the founder and design team to rapidly implement and iterate on new feature concepts.

This is an exciting opportunity to join a fast-growing, innovative startup at a pivotal stage of its journey.

What we value

The ideal developer for Amondo is someone who is a self-starter, understands the product deeply, is confident engaging with stakeholders, can plan their work and communicates proactively with the team.

Autonomy: The ability to work independently, make informed decisions and manage time effecively.

Communication: Strong communication skills are essential at every level. Developers should communicate clearly and concisely with team members, customers and other stakeholders, keeping everyone informed of progress, challenges and solutions.

Technical competency: Possesses strong technical skills to efficiently tackle complex problems, execute tasks efficiently and deliver high-quality results.

What you'll do

• Develop new features for our platform, including internal dashboards, JavaScript embeds, and integrations with media and third-party services.
• Enhance and refine our development processes and workflows for greater efficiency.
• Build a real-time editor to enable seamless multi-user collaboration.
• Implement monitoring and analytics to improve the observability and reliability of our services.
• Support smooth transitions between platform iterations and ensure backward compatibility.
• Work with high-quality designs to create modern, responsive, and visually appealing user interfaces.

The tech

• React, Remix, Tailwind, Vite, Jest, Cypress, Storybook, Radix, Chromatic
• Node.js, Cucumber.js, GraphQL, PostgreSQL, Turborepo, pnpm
• AWS, S3, Render, Heroku, PostHog
• GitHub, Slack, Notion, Linear

About you

• Strong, demonstrable working experience with React
• Have an eye for design, and enjoy creating pixel perfect web pages from Figma files
• Strong working knowledge of Javascript (ES6, ES7), CSS, HTML, TypeScript, Node, Remix (React-Router)
• Experience working in a lean startup environment
• TDD, Git and CI development experience
• Awareness of best DevOps practices
• Excellent communication skills

What we offer

• Interesting and challenging work
• Work remotely, no commuting to the office
• 4 day work week
• 5 weeks of paid vacation
• Flexible work hours
• Employee autonomy
• Annual international team retreats
• Other perks in the pipeline

Equal opportunities

We value ersity and believe success comes from teams where everyone can be their authentic selves. We welcome applicants from underrepresented backgrounds and are committed to an inclusive, non-discriminatory environment for all.

The application process

1. Submit your application via the form (with an optional video submission)
2. A call with the founder to discuss the company, mission and team
3. A call with one/some of our engineering team to discuss stack and processes
4. A paid trial project - which will give both sides a hands-on opportunity to get to know each other

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

🏖 Paid time off

📆 4 day workweek

🏔 Company retreats

💰 Profit sharing

👀 No monitoring system

UserEvidence is a SaaS platform that unlocks stories from happy customers, and automatically creates a library of beautiful content assets. We are the only platform purpose-built to unlock customer love at scale. Credibility and noise are huge issues in B2B marketing and sales. We believe companies can sell a lot more when they let their customers do the talking, and show real-life evidence and feedback from their users.

**Responsibilities

You’ll be part of a small team of senior engineers responsible for developing the core UserEvidence application.

In this role, you will:

• Design, develop, and maintain scalable and high-performance features for our core Ruby on Rails application.
• Collaborate with cross-functional members to gather requirements, design solutions, and implement new features.
• Optimize application performance, database queries, and overall system architecture.
• Write clean, maintainable, and testable code following best practices and industry standards.
• Conduct code reviews and provide constructive feedback to junior team members.
• Identify and troubleshoot software defects, performance bottlenecks, and system failures.
• Stay up-to-date with the latest trends and advancements in Ruby on Rails and web development.

**Requirements

• At least six years building software in a team environment or equivalent experience. Years of experience doesn’t always capture expertise, so we encourage you to apply if you can demonstrate you’re well versed in building software in a team environment
• At least two years working professionally on a Ruby on Rails application or equivalent experience.
• Experience writing code that is accessible, scalable, maintainable, and performant
• Experience with any modern frontend framework (Vue, React, Angular, ...)
• Experience working with background job processing environments - like Sidekiq or other ActiveJob processors
• Experience writing complex queries for relational databases - we use PostgreSQL.
• Comfortable working remotely in an autonomous environment - you don’t mind asking questions and problem solving in public communication channels.
• Able to work in US time zones - you don’t have to live in those time zones, but you have to be able to collaborate with your teammates during those times.
• You must be located in South or Central America regions. We are currently not accepting US-based or Europe-based applicants.

**Benefits

• Competitive salary and bonus + a large equity stake. We pay in the 75th percentile of market rates.
• Unlimited PTO + 13 paid holidays per year.
• $4,000 equipment allowance for your first two years, $3,000 budget every following two years.
• Health, dental, vision insurance.
• Inidual learning + development budget (up to $2,500/year).
• Flexible work schedule and remote work options.
• Coworking space membership reimbursement.

Twilio is hiring a remote Software Engineer Intern (12 weeks, June start). This is an internship position that can be done remotely anywhere in Estonia.

Twilio - Build the future of communications.

About Helius

Helius is a leading developer platform on the Solana blockchain, dedicated to inspiring and accelerating the creation of crypto-powered software. Our mission is to empower developers and businesses by providing them with the tools and resources they need to build the future of decentralized applications. We specialize in developing RPCs, indexers, webhooks, APIs, and more for the Solana ecosystem.

We’ve raised over $34M from Haun Ventures, Founders Fund, Foundation Capital, 6th Man Ventures, Reciprocal Ventures, Chapter One and angel investors including Solana co-founders Anatoly Yakovenko and Raj Gokal, and Balaji Srinivasan. Our team members have previously built mission-critical, scalable infrastructure at AWS, Coinbase, Stripe, Google, Digital Ocean, and more. Here is the Helius Manifesto so you know what to expect if you join Helius.  

Role Description

We are looking for a Senior Backend/Infrastructure Engineer with experience in building and scaling distributed systems to join our growing team. If you have a passion for blockchain technology and a high sense of ownership, we’d love to hear from you!

Responsibilities:

• Design, implement, and maintain scalable and reliable backend infrastructure to support our growing suite of developer tools and services
• Collaborate with cross-functional teams to ensure seamless integration of infrastructure components with existing systems
• Identify bottlenecks and optimize performance of our services to handle increasing traffic and load
• Develop monitoring and alerting systems to maintain high levels of system availability and performance
• Continuously improve system architecture, security, and best practices to stay up-to-date with industry standards
• Mentor and support other team members in understanding and implementing complex technical concepts

Requirements:

• 3+ years of experience in backend development and infrastructure engineering, with a focus on distributed systems
• Strong understanding of blockchain technology, particularly the Solana ecosystem
• Proficient in programming languages such as Rust, Go, and Typescript
• Experience with cloud computing platforms (AWS, GCP, Azure) and containerization technologies (Docker, Kubernetes)
• Knowledge of database technologies (SQL, NoSQL) and data processing frameworks (Apache Kafka, RabbitMQ)
• Strong problem-solving and analytical skills, with the ability to adapt to new technologies quickly
• Excellent communication and collaboration skills, with a high degree of ownership and agency

What We Offer

• Competitive salary and equity package
• Flexible work hours and remote-friendly environment
• Generous vacation and time-off policy
• Opportunities for personal and professional growth in a fast-paced, dynamic industry

Helius is an equal opportunity employer.

About Helius

Helius is a leading developer platform on the Solana blockchain, dedicated to inspiring and accelerating the creation of crypto-powered software. Our mission is to empower developers and businesses by providing them with the tools and resources they need to build the future of decentralized applications. We specialize in developing RPCs, indexers, webhooks, APIs, and more for the Solana ecosystem.

We’ve raised over $34M from Haun Ventures, Founders Fund, Foundation Capital, 6th Man Ventures, Reciprocal Ventures, Chapter One and angel investors including Solana co-founders Anatoly Yakovenko and Raj Gokal, and Balaji Srinivasan. Our team members have previously built mission-critical, scalable infrastructure at AWS, Coinbase, Stripe, Google, Digital Ocean, and more. Here is the elius Manifesto so you know what to expect if you join Helius.  

Role Description

We are looking for a Principal Engineer to help found our Platform Engineering Team. You will be responsible for building the internal developer platform and accelerating our engineering team. Your work will involve scaling our host & software management solutions to support thousands of bare-metal servers, including our Solana validator(s) and our RPC fleet. You will build service frameworks which provision and manage globally distributed services, ensuring high-reliability and uptime as they handle billions of customer requests per day.

If you have a passion for blockchain technology and a strong sense of ownership, we’d love to hear from you!

Responsibilities

• Design, implement, and manage automated systems for deploying, monitoring, and maintaining our bare-metal servers and services.
• Develop and maintain CI/CD pipelines to streamline the deployment process.
• Enhance the security of our infrastructure and networks by implementing best practices and proactive measures.
• Monitor system performance, identify and resolve issues to ensure high availability and reliability.
• Lead incident response and root cause analysis for system outages and issues.
• Implement robust security measures to safeguard sensitive data and protect against cyber threats and attacks.
• Collaborate with the engineering team to optimize performance and scalability of our services.
• Establish and enforce policies and procedures to ensure compliance with industry standards and regulations.

Requirements

• A minimum of 8 years of experience in a DevOps or Site Reliability Engineering role, preferably in a high-performance, low latency environment.
• Experience managing and optimizing bare-metal server environments.
• Expert scripting and programming skills (e.g., Bash, Python, Go).
• Experience in Rust, Golang, Java, or a similar language.
• Proficiency with monitoring and logging tools (e.g., Prometheus, Grafana, ELK stack).
• Strong knowledge of automation tools and frameworks (e.g., Ansible, Terraform, Puppet, Chef).
• Expertise in CI/CD tools and practices (e.g., Jenkins, GitLab CI, CircleCI).
• Excellent problem-solving skills and the ability to troubleshoot complex issues.
• Strong communication skills and the ability to collaborate effectively with cross-functional teams.
• Ability to work independently and take ownership of projects from start to finish.

Preferred Qualifications

• Experience with blockchain technologies, particularly Solana.
• Prior experience in a startup or fast-paced environment.

What We Offer

• Competitive salary and equity package
• Flexible work hours and remote-friendly environment
• Generous vacation and time-off policy
• Opportunities for personal and professional growth in a fast-paced, dynamic industry

Helius is an equal opportunity employer.

Job description

• We are seeking a highly skilled Senior Software Engineer to join our team and contribute to the transformative tech evolution in healthcare. 
• This critical role involves developing, integrating, and optimising our backend and database systems. 
• You will work closely with our Chief Engineer and CTO to build and refine our software solutions, ensuring they remain at the cutting edge of innovation.

Your Role:

• Develop and maintain robust backend services using NestJS and Node.js, ensuring top-tier performance and security.
• Design and manage efficient REST API endpoints to optimise interactions with our SQL database.
• Collaborate with cross-functional teams to define, design, and deploy new features, focusing on backend logic and database performance.
• Ensure the scalability, security, and responsiveness of backend services.
• Uphold rigorous data protection standards and implement industry-leading security measures.
• Participate in code reviews to uphold high coding standards and foster continuous improvement within the development team.

What Youll Bring:

Essential Skills & Experience:

• At least 7 years of experience with:
• React
• React Vite
• REST API development
• Strong knowledge and hands-on experience with SQL.
• Proficiency in Prisma for database management.
• A minimum of 5 years of experience in REST API development using the NestJS framework.
• Expertise in backend development, specifically with NestJS, Node.js, REST APIs, and PostgreSQL.
• Experience in developing single-page applications using ReactJS.
• Strong understanding of TypeScript and Object-Oriented Programming (OOP) principles.
• Solid grasp of commonly used data structures.
• Proven experience with cloud hosting services (preferably AWS) and integrating them into development workflows.
• Exceptional problem-solving skills and meticulous attention to detail.
• A proven ability to thrive in collaborative, remote work environments, showcasing excellent communication skills and a commitment to team success.
• A portfolio demonstrating relevant projects.

Nice-to-Haves:

• Experience with CI/CD pipelines and version control systems like Git.
• Familiarity with agile development methodologies and project management tools.
• Knowledge of Redux for state management.
• A degree in Computer Science or a related field.

"

About Helpcare AI

At Helpcare AI, our mission is to expand the world’s capacity to care, 3x the care received per year, and break the 40-year interoperability barrier by eliminating the administrative burden that slows healthcare providers. Helpcare's autonomous AI agents find, call, and schedule, freeing medical teams to prioritize patient care & access to healthcare.

Who You Are:

* Data Story Teller: You excel at onboarding data from multiple sources, accurately understanding the numbers, generating new insights, and clearly articulating that story.

What You’ll Do:

* Onboard Data: Work with multiple data sources to import and normalize client data, ensuring seamless integration with our systems.

What We’re Looking For:

* Proven Data Engineering Expertise: 5+ years of experience as a data engineer, with a focus on healthcare data integration and management.

Why Join Helpcare AI?

* Shape and Grow: As a founding team member, you'll influence the direction and culture of a YC-backed startup, engaging in a dynamic environment with significant opportunities for personal and professional development.

Also in the process of establishing a formal 401(k) and health plan to further support our team.

How to Apply

Send us:

* Resume / Cv / Cover Letter

Let’s talk.

",

"

About Helpcare AI

At Helpcare AI, our mission is to expand the world’s capacity to care by 3x, and break the 40-year interoperability barrier by eliminating the administrative burden that slows healthcare providers. Helpcare's autonomous AI agents find, call, and schedule freeing medical teams to prioritize patient care & access to healthcare.

Who You Are:

* Front-End Innovator: You’re an expert in modern front-end frameworks, design principles, and creating seamless, user-friendly interfaces.

What You’ll Do:

* Craft Engaging Interfaces: Design and build beautiful, intuitive front-end interfaces that enable healthcare providers to co-create duties with AI Agents, and interact with knowledge and tasks.

What We’re Looking For:

* Proven Front-End Expertise: 6+ years of experience as a front-end engineer, with a strong portfolio showcasing your work in production environments. You should have built websites for internal and external consumption, and know the difference. Be able to develop without a live backend, so proficiency in various levels of mocking: within unit tests, within your development flow and with multiple backends.Understand session and cookie management.

Why Join Helpcare AI?

* Shape and Grow: As a founding team member, you'll influence the direction and culture of a YC-backed startup, engaging in a dynamic environment with significant opportunities for personal and professional development.

Also in the process of establishing a formal 401(k) and health plan to further support our team.

How to Apply

Send us:

* Resume / Cv / Cover Letter

Let’s talk.

",

"

About Helpcare AI

At Helpcare AI, our mission is to expand the world’s capacity to care by 3x, and break the 40-year interoperability barrier by eliminating the administrative burden that slows healthcare providers. Helpcare's autonomous AI agents find, call, and schedule freeing medical teams to prioritize patient care & access to healthcare.

Who You Are:

* Full Stack Innovator: You’re comfortable working across the stack, from front-end frameworks to back-end systems, and thrive in turning complex ideas into reality.

What You’ll Do:

* Laying the Foundation: Join us to set and build a full-stack infrastructure, delivering scalability and reliability to these newborn Agents, setting infra, observability, dev ops standards. These agents call, text, chat, email, use computers, and hold context.

What We’re Looking For:

* Proven Full Stack Expertise: 6+ years of experience working as a full-stack engineer, with a strong portfolio of delivering production-quality systems. You should have built multiple websites or apps in teams of 3 to 5 devs, for internal and external users,while adding complex features like usage tracking, subscriptions etc. Bonus points for building a self service platform with adequate levels of authentication and authorization.

Why Join Helpcare AI?

* Shape and Grow: As a founding team member, you'll influence the direction and culture of a YC-backed startup, engaging in a dynamic environment with significant opportunities for personal and professional development.

Also in the process of establishing a formal 401(k) and health plan to further support our team.

How to Apply

Send us:

* Resume / Cv / Cover Letter

Let’s talk.

",

The Autonomys Network (formerly, Subspace Labs)

Autonomys is an early-stage, venture-backed startup pioneering a new category at the intersection of AI and Web3. With our upcoming mainnet launch this year, the Autonomys Network is a radically decentralized, next-generation layer one blockchain powered by an innovative proof-of-archival storage (PoAS) consensus mechanism. Our project serves as a foundation for global collaboration between humans and AI, ushering in a new era of possibilities. The Subspace Protocol is based on original research funded by the US National Science Foundation.

To learn more, visit our technical whitepaper.

In this role, you will…

• Build user flows across both web and backend (React and Node).
• Integrate directly with other blockchain networks using native RPCs.
• Collaborate with Product, Design, and Engineering to define, prioritize, and build features for Web3 users.
• Drive detailed project definition and cross-functional alignment.

Key Requirements:

• 3+ years of experience building open-source code that is clean, maintainable, and well-tested, for production networks at scale.
• 2+ years of experience working with Typescript and Node.js.
• 2+ years of experience of experience with Ethers/Web3.js or Polkadot.js.
• 2+ years of experience working with React.js.
• A passion for decentralized, peer-to-peer systems and Web3 technologies.

Preferred Skills:

• Familiarity with Substrate and the Polkadot ecosystem.
• Familiarity with Next.js, Tailwind CSS and other modern frontend frameworks.
• Experience with SubQuery data indexing and querying framework.
• Experience building developer SDKs and internal tools.
• Experience developing AI tools, including Retrieval-Augmented Generation (RAG) systems, AI agents, and custom chatbots.
• Experience integrating smart contracts with frontend.
• Theoretical knowledge of blockchains and distributed systems.

What We Offer

• The ability to work from anywhere in the world
• A competitive salary with generous equity and token grants
• Medical, dental, and vision insurance (US-based only)
• A unique opportunity to shape the future of the internet
• Team off-sites in various locations around the globe

What are we all about?

We are a team of builders and researchers on a mission to empower enterprises and developers worldwide to access and build on decentralized systems.

Our expertise covers several domains: Ethereum and Starknet protocol engineering, layer-2, AI, cryptography research, protocol research, decentralized finance (DeFi), security auditing, formal verification, real-time monitoring, smart contract development, and dapps and enterprise engineering.

Working to solve some of the most challenging problems in the blockchain space, we frequently collaborate with renowned companies, such as Ethereum Foundation, Starknet Foundation, Gnosis Chain, Flashbots, Forta Protocol, Lido, EigenLayer, Open Zeppelin, RISCZero, Aleph Zero, and many more.

Today, we are a 350+ strong team working remotely across 66+ countries.

Role Overview:

As a Senior Fullstack Engineer, you will be responsible for designing, developing, and maintaining both frontend and backend components. You will work closely with product managers, designers, and other engineers to deliver high-quality, secure, and scalable solutions that meet the needs of our clients. This role requires a deep understanding of both frontend technologies like React and backend systems.

We are looking for candidates located in the EMEA region.

Why You’ll Love This Role

• Impactful Work: Your contributions will directly influence the way stakeholders interact with and perceive the security of blockchain networks through both the dashboard and the Insights API.
• Collaborative Environment: Join a team of passionate professionals who are committed to innovation, quality, and making a tangible impact in the blockchain space.
• Professional Growth: Enjoy opportunities for professional development and career progression in a rapidly evolving industry.

About You

An ideal candidate has 5+ years of Full-Stack Development experience and contributed to blockchain-related projects. We are looking for candidates who have worked on complex projects in a distributed team.

• Problem-Solving Attitude: Creative thinker with a knack for solving intricate technical challenges.
• Communication: Excellent communication skills, with the ability to convey technical concepts to non-technical stakeholders.
• Autonomous: The ability to work independently, make informed decisions, and take initiative without needing constant supervision, ensuring high productivity and effective problem-solving.
• Mentorship and Leadership: Provide technical guidance and mentorship to team members, fostering a culture of continuous learning and improvement.

Responsibilities:

• Collaborate with cross-functional teams, including product managers, designers, and other developers, to deliver high-quality projects on time.
• Writing clean, efficient, and maintainable code: Writing code that is easy to understand and modify is crucial.
• Debugging and testing: Ensuring that the frontend code is error-free and performs optimally through debugging tools and testing methodologies.
• Staying up-to-date with emerging trends and technologies: The web development industry is constantly evolving, and it is essential to stay current with the latest technologies, trends, and best practices.
• Documenting code and maintaining code repositories: To ensure that the development team can easily understand and modify the codebase, it is crucial to document your code and maintain code repositories.
• Participating in code reviews: Code reviews help identify potential issues and ensure that the codebase meets quality standards. You should be prepared to participate in code reviews and provide feedback on other team members’ code.
• Assisting with deployment: You may be involved in the deployment process, which includes configuring web servers, managing version control systems, and resolving any issues that arise during deployment.
• Provide guidance and mentorship to more junior developers, promoting continuous learning and improvement within the team.

Skills:

• Excellent skills in modern JavaScript/Typescript, Python or Java
• A deep understanding of the architecture of modern client- and server-side React applications
• Experienced in designing scalable APIs
• Experienced in testing backend and frontend
• Experienced in modern database design and interaction (SQL and/or NoSQL)
• Expertise in architecture principles, design patterns, and the ability to analyze and address trade-offs in business requirements, system performance, reliability, and maintainability
• Experience in working closely with a DevOps team to design and deploy cloud-native infrastructure, to ensure scalability and reliability

Nice to have:

• Blockchain application experience (e.g. DeFi Protocols, Wallets, DEXs, block explorers, blockchain user-facing applications)
• Experience with smart contract development and interaction (e.g., Solidity, Web3.js, ethers.js)
• Small team leadership experience
• Financial Services and Markets understanding

Keep up to date on what we are working on by following us on our social channels:

• Discord
• LinkedIn
• Twitter

About Vac

public good protocols for the decentralized web. We do applied research based on which we build protocols, libraries and publications.

The role

We are seeking a skilled and passionate Software Developer in Test with experience in Low Level Programming to join our Vac QA team. As a Test Automation Engineer, you will play a crucial role in ensuring the reliability, performance, and scalability of distributed systems within Vac and the IFT.

Your responsibilities will include automating comprehensive test plans, as well as contributing to the identification and resolution of complex issues. Leveraging your expertise in programming and systems knowledge, you will help validating the functionality of distributed systems.

Key responsibilities

• Implement (Nim, Rust, TS, Python), and maintain integration tests in collaboration with other QAs and Devs.
• Execute and automate test plans, test cases, and test scripts to validate the functionality, performance, and scalability of distributed systems.
• Identify, reproduce, and debug complex issues in distributed systems, working closely with Logos development teams.
• Work with Docker, Kubernetes, and POSIX-like systems.
• Create and maintain scalable test automation frameworks.
• Integrate automated tests into CI pipelines using tools like Github Actions.

You ideally will have

• Solid experience with systems programming languages like Rust, Nim, Go.
• Working knowledge of Docker, Kubernetes, and POSIX-like systems.
• Experience with scripting languages like Python.
• Knowledge of tests automation tools, best practices and design patterns.
• Excellent written and conversational communication skills.
• Alignment with our core values and principles.

Bonus points

• Experience with off-the-shelf networking stacks such as libp2p.
• Experience in blockchain technology.
• Experience working for an open-source organization.
• Experience with desktop UI automation.

[Don’t worry if you don’t meet all of these criteria, we’d still love to hear from you anyway if you think you’d be a great fit for this role. Just explain to us why in your cover letter].

Hiring process

The hiring process for this role will be:

1. Interview with our POps team
2. Interview with team member from the Vac QA team
3. Take home assignment & interview with team member from the Vac QA team
4. Interview with Vac team lead

The steps may change along the way if we see it makes sense to adapt the interview stages, so please consider the above as a guideline.

Compensation

The expected compensation range for this role is negotiable, dependent on how we assess your skills and experience throughout our interview process. We are happy to pay in any mix of fiat/crypto.

Wikimedia Foundation is hiring a remote Senior Software Engineer (PHP). This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Wikimedia Foundation - The non-profit that operates Wikipedia.

"

At Spaceium, we’re redefining space exploration by developing cutting-edge systems that power our stations. As a Mechanical Engineer – Fluid Storage and Transfer Systems, you’ll be at the forefront of designing and optimizing fluid systems for space applications. Your role will focus on sourcing critical components and designing custom parts to enable reliable storage and transfer of fluids in challenging space environments. Collaboration with multidisciplinary teams will be vital, and a solid understanding of fluid dynamics, thermodynamics, and mechanical design is essential.

Responsibilities

* Design and develop systems for fluid storage and transfer in space, ensuring high performance and reliability.

Basic Qualifications

* Bachelor’s degree in Mechanical Engineering or a related field.

We’re working on innovative technologies that have never been developed before, so direct experience isn’t always necessary. If you’re eager to learn, ready to take on ambitious challenges, and passionate about space exploration, we encourage you to apply. Whether you’re new to the field or have extensive expertise, we value your creativity and dedication to solving tough problems.

Preferred Skills and Experience

* Passion for spaceflight and high-reliability electronic systems with familiarity in aerospace design practices.

Additional Requirement

* Extended hours and weekend work may be required to support critical project and mission milestones.

Compensation:

* Pay range: $90k-$110k USD per year

",