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Stitch Fix is hiring a remote Machine Learning Engineer - Foundational Models. This is a full-time position that can be done remotely anywhere in the United States.

Stitch Fix - Your online personal stylist.

About aPriori

aPriori is an MEV infrastructure and liquid staking protocol, designed for the parallel execution era and natively built on Monad. We are building the foundational infrastructure for the next era of decentralized finance, helping stakers, protocols and validators maximize yield with transparency and efficiency. Our team is composed of experts in high-performance trading, DeFi protocols, distributed systems, and blockchain infrastructure.

The Role

We’re looking for a strong Senior or Staff Backend Engineer passionate about solving complex problems with high-performance solutions. You will play a pivotal role in our journey from testnet to mainnet, with significant ownership in all stages from design, development, deployment, and maintenance. You’ll work closely with a highly experienced, crypto-native team to architect and implement performant backend systems.

What You’ll Do

• Design, build, and maintain scalable, mission-critical backend services and APIs powering liquid staking, mev infrastructure and other foundational DeFi systems
• Work on high-performance systems that interact with blockchain networks in real-time
• Collaborate with smart contract engineers, frontend engineers, and leadership to ship end-to-end features
• Contribute to technical decisions and engineering culture across the stack, including system architecture and design patterns

What We’re Looking For

• 4-10 years of backend software engineering experience in one of the following: Golang, Rust, C/C++, Python, Java, Node.js
• Experience in designing, developing, and maintaining scalable, high-performance backend systems and public-facing APIs
• Experience in managing and optimizing databases like PostgreSQL to ensure data integrity, enhance performance, and achieve scalability
• Excellent communication and collaboration skills
• Strong sense of ownership and a passion for driving complex technical decisions
• Ability to move fast and ship software to production with rapid iteration
• Academic background from a top-tier university and/or experience at a well-regarded technology company is a strong plus.

Nice to Haves:

• Experience in building backend systems interacting with blockchains
• Experience designing and developing liquid staking solutions, dexes and/or mev infra in production
• Knowledge of blockchain infrastructure, validator clients and p2p networking
• Deep knowledge of DeFi legos

Why Join Us

• Work at the frontier of crypto and DeFi infrastructure
• Join a tight-knit, low-ego team with deep technical chops
• Competitive compensation, bonus and token upside
• Fully remote, flexible work culture

We’re based on over 15 years of success, producing world-class video content and building, developing, and managing a number of high-traffic websites. Our award-winning content and websites are created exclusively by us and directly for the use of millions of users worldwide. At Kodify, we’re not just pushing boundaries in online entertainment—we’re rewriting the script! Our goal is to empower our people with everything they need to pioneer innovation in our industry. Our culture is our secret sauce, and we’re committed to preserving and enhancing it every step of the way.

Join our crew, where the Kodify team is not just an asset—it’s our crown jewel. We prioritize their growth and well-being above all else, ensuring they’re set up for success and always inspired to deliver their best work.

As a rapidly expanding company with erse hubs across the globe and over 20 vibrant national cultures, working with us means embracing thrilling challenges tailor-made for a star QA Automation Engineer!

At Kodify, we love tech and are always thinking about what’s next! R&D and optimizations are part of our spirit.

Your Role

We are looking for a talented QA Automation Engineer to join our remote team and contribute to the development and maintenance of automated testing frameworks. This role is open to remote candidates based in the European Union (a must for us). You will work closely with developers, DevOps engineers, and other QA team members to ensure the quality and reliability of our applications through automation.

As part of our team, you will help design, implement, and maintain robust test automation strategies while collaborating with cross-functional teams to enhance software quality. You will be responsible for ensuring that automation is seamlessly integrated into our CI/CD pipelines and that our applications meet the highest quality standards.

Your Responsibilities

• Develop, maintain, and enhance automated test suites for UI, API, and performance testing.
• Collaborate with developers and QA engineers to ensure comprehensive test coverage.
• Identify, document, and track defects while ensuring their timely resolution.
• Assist in defining and implementing QA best practices, including CI/CD integration.
• Support and improve automated testing efforts for regression, functional, non-functional, and security testing.
• Analyse test results, identify trends, and provide actionable insights to improve software quality.
• Ensure automation is scalable and efficient, identifying opportunities for optimisation.
• Contribute to performance, stress, and load testing to ensure our applications perform at scale.
• Work in an Agile/Scrum development process, participating in sprint planning, stand-ups, and retrospectives.
• Stay up to date with emerging technologies, tools, and industry best practices in test automation and security testing.

You

• You thrive in a collaborative environment and enjoy working with cross-functional teams.
• You are proactive, detail-oriented, and take ownership of your work.
• You love problem-solving and have a passion for delivering high-quality software.
• You are an excellent communicator who enjoys giving and receiving constructive feedback.
• You stay updated with industry trends, especially in test automation and cybersecurity, and continuously seek to improve your skills.
• You enjoy working in a fast-paced and evolving environment.

What We Offer

• Fully remote position or, if preferred, working in our awesome Barcelona office!
• Agile environment
• Top-notch tech stack!
• Upskill Fridays! Developers take time on Fridays to improve your skills, learn and research new trends that will allow us to level up our stack and processes
• Flexible working hours + core hours!
• 10% on top of your salary for learning and development - of your choice!
• Latest MacBook Pro!
• Company Amazon book account!
• Kodify off-sites, on-sites, events, and team activities!
• Amazing international team!
• 1 day off on your birthday
• Generous vacation and personal days
• 1 month paid sabbatical after 3 years
• Extended parental leave
• Health & Wellness budget

Job requirements

• 4+ years of experience in QA automation.
• Strong experience with JavaScript/TypeScript and related test automation frameworks such as Playwright, TestCafe, Cypress, Webdriver.io, Mocha, Chai, Jest.
• Solid understanding of API and web services testing (REST, GraphQL, Postman, or similar).
• Experience integrating test automation into CI/CD pipelines (GitHub Actions, Jenkins, GitLab CI, or similar).
• Familiarity with performance testing tools (Lighthouse, JMeter, K6) and best practices.
• Hands-on experience with security testing tools such as OWASP ZAP, Burp Suite, or similar.
• Good understanding of version control workflows (e.g Git).
• Strong analytical and debugging skills, with the ability to provide meaningful insights to developers.
• Experience with security testing methodologies, including vulnerability scanning, penetration testing, and security automation in CI/CD pipelines.
• Understanding of common security threats (e.g., XSS, SQL injection, CSRF, authentication vulnerabilities) and how to test for them.
• Excellent communication and collaboration skills.
• A strong passion for software quality, automation, and security.

Bonus Points

• Experience with TypeScript.
• Industry certifications related to security testing (e.g., CEH, OSCP, GIAC).
• Hands-on experience in penetration testing for web applications.
• Experience working in high-traffic environments.
• Knowledge of Microservices Architecture.
• Experience with cloud platforms (AWS, Kubernetes, Docker).
• Strong understanding of frontend performance testing.
• Previous experience working remotely and within distributed teams.

We are looking for a highly technical Developer Relations Engineer who is passionate about blockchain development and interoperability. This role is not just about engaging with the community—it’s about building, teaching, and supporting developers in integrating ZetaChain’s technology into their projects. You will be hands-on with Solidity, and other smart contract languages, creating technical content, supporting developer teams, and growing the ZetaChain ecosystem.

What You’ll Do

• Developer Engagement & Advocacy
  • Build relationships with developers and projects to help them successfully integrate ZetaChain.
  • Provide hands-on technical support to teams building universal applications on ZetaChain.
  • Manage and engage in developer communities (Discord, GitHub, X, Telegram) by answering questions, sharing insights, and gathering feedback.
  • Focus on outreach and content, with about 70% “relational” work (e.g., community engagement) and 30% coding.
• Technical Content & Education
  • Write deep-e blog posts, tutorials, and technical documentation to guide developers in building cross-chain applications.
  • Conduct live coding sessions, workshops, and webinars to onboard new developers.
• Hackathons, Bounties & Developer Acceleration
  • Organize online hackathons and developer bounties to foster innovation.
  • Support early-stage projects building on ZetaChain through mentorship and funding initiatives.
  • Design challenge tracks for developer events, ensuring they align with ZetaChain’s strategic goals.
• Ecosystem & Tooling Support
  • Collaborate with external service providers to improve the developer experience on ZetaChain.
  • Work closely with the engineering team to provide developer feedback and improve ZetaChain’s protocol and tools.

What You Bring

• Strong Technical Background
  • Proficiency in Solidity (required), with experience writing and deploying smart contracts.
  • Familiarity with TypeScript, Rust and Move (optional).
  • Experience working with blockchain node infrastructure, RPCs, and cross-chain messaging.
• Developer Relations & Community Building
  • Experience in DevRel, Developer Advocacy, or Technical Education.
  • Experience managing developer communities and providing technical support.
  • Strong communication skills and ability to explain complex technical topics clearly.
• Startup & Ecosystem Growth Mindset
  • Proactive, self-motivated, and comfortable working in a fast-moving environment.
  • Excited about interoperability, cross-chain development, and universal apps.
  • Passion for open-source projects and contributing to the blockchain ecosystem.
• Travel Requirements
  • This position requires frequent travel to attend conferences, hackathons, and developer events globally.
  • Must be eligible to travel to the US without a VISA.
  • Candidates based in San Francisco (SF) or New York City (NYC) will be prioritized, but we are open to exceptional candidates from other locations.

Compensation

Base Salary: $135,000 – $175,000 (San Francisco benchmark)

In addition to the base salary, all full-time team members receive an additional 10% to 25% in liquid benefits with upside based on role, experience, and impact. We believe in building together and sharing in the long-term success of the network. Compensation packages are designed to be competitive and aligned with the growth of both the team and the ecosystem.

As the Protocol Engineering Lead at ZetaChain, you will be responsible for driving the architecture, design, and development of our core blockchain protocol. You will lead a team of talented blockchain engineers, guiding the technical direction of the protocol and ensuring it meets the highest standards of performance, and security. This role requires deep expertise in blockchain systems, and strong leadership.

Responsibilities

• Lead the design, development, and optimization of the protocol, ensuring code quality, maintainability, and performance.
• Make key architectural decisions and guide long-term protocol strategy in alignment with the company’s goals.
• Manage and mentor a high-performing team of blockchain engineers, fostering a culture of excellence, ownership, and collaboration.
• Drive technical planning, execution, and delivery of the protocol SDLC including CI testing and mainnet upgrades.

Experience

• 6+ years of software development experience
• 3+ years of blockchain protocol experience, including Cosmos SDK or similar ecosystems
• Prior experience leading and mentoring engineering teams, with a strong sense of ownership
• Deep understanding of distributed systems, consensus algorithms, and performance optimization
• You are not expected to be an expert in all smart contract languages but strong Solidity knowledge is a must.
• Smart contract experience from chains like Solana, SUI, Bitcoin, or TON is a huge plus

Our tech stack

We’re a polyglot team and value engineers who can navigate across boundaries but you are not expected to be an expert in every area. Our core stack includes:

• Smart contracts: Solidity, Rust (Solana), Move (SUI), FunC (TON)
• Protocol: Go (Cosmos SDK, geth, btcsuite)
• CI/Infra: Docker, Kubernetes, GitHub Actions

Location

Hybrid position in San Francisco is preferred but open to excellent candidates remotely in US or EU regions only.

Compensation

Base Salary: $150,000 – $200,000 (San Francisco benchmark)

In addition to the base salary, all full-time team members receive an additional 10% to 25% in liquid benefits with upside based on role, experience, and impact. We believe in building together and sharing in the long-term success of the network. Compensation packages are designed to be competitive and aligned with the growth of both the team and the ecosystem.

Fold is looking to hire a Senior Front End Engineer to join their team. This is a full-time position that can be done remotely anywhere in the United States.

Datadog is hiring a remote Principal Sales Engineer (EMEA). This is a full-time position that can be done remotely anywhere in Germany.

Datadog - Modern monitoring & analytics.

‍Overview‍

Daisychain is excited to announce the opening for a Software Engineer to join our team. This inidual will be a part of our small, innovative team that is giving progressive community organizers new ways to bring data about their supporters together, orchestrate outreach, and automate busy-work – while scaling the impact they have in the world.  

We’re seeking a software engineer who is excited about using their talents to deepen the impact of the causes we work with while having an opportunity to shape the technical direction of our product.

‍Daisychain is building a modern platform for effective organizing. Our customers include progressive political campaigns, grassroots organizations, and ambitious non-profits. Collectively, they're using Daisychain to win critical campaigns, build powerful movements, and create a more just and equitable world. 

‍Job Title: Software Engineer

‍Reports to: CTO

Schedule: Full-Time

‍Location: We're building a remote product and engineering team with a center of gravity in the New York City metro area. Work from anywhere with high speed internet as long as your work day overlaps with the U.S. East Coast business hours, so we can talk on Zoom and Slack. For candidates outside of the NYC metro area, this role requires travel to a team gathering 1-2 times per year.

‍Responsibilities

• ‍ Work collaboratively to deliver new features of the Daisychain product to customers.
• Take part in planning new features, understanding high-level customer requirements, and shaping the vision for the Daisychain product.
• Participate in peer code review, technical planning and architectural decision making.

‍Experience Requirements

• At least 3 years of experience writing ambitious full-stack software for the web.
• Experience with a modern javascript framework like React or Vue.js
• Experience with a model-view-controller web framework like Express.js, Django or Rails.
• Experience with or openness to working remotely as part of a collaborative team.
• Familiarity and experience with the ways that organizations and campaigns use the internet to create social change and organize people.
• A passion for positive and progressive social change.
• Fluent in written and spoken English

‍Preferred Qualifications

• Experience with AI/ML techniques.
• Experience with voter files and other technologies that make up the political technology ecosystem.
• Experience with column oriented databases or large scale data integration.

Technical Background

Our tech stack includes Ruby, Vue.js, Typescript, Clickhouse and Postgres, deployed on AWS. We are passionate about software engineering as a craft.  Daisychain is built on a solid foundation of best practices like continuous delivery, acceptance tests, monitoring and code review.

Compensation and Benefits

‍We’re considering both full-time salaried roles for candidates within the United States and contractor roles for candidates based outside of the United States.

• The salary range for this position for full-time US Candidates is $120k - $160k depending on experience. The contractor compensation range for this position is dependent on location and experience.
• Profit Sharing: Full-time employees are eligable to participate in Daisychain's profit-sharing program, aligning with our commitment to sharing the financial rewards of our collective efforts.
•  Benefits: Daisychain offers a comprehensive benefits package to full-time employees, including medical, dental, vision, matching 401(k), and paid time off.

‍Daisychain is an Equal Opportunity Employer

We believe that ersity of ideas and perspectives makes our products and the movements that we serve stronger. We are proud to be an inclusive and equal-opportunity workplace, where all applicants and employees are considered for hire, promotion and job status without regard to race, ethnicity, color, religious affiliation, national origin, age, gender identity or expression, sexual orientation, or physical handicap.

Salary and compensation

Benefits

💰 401(k)

🌎 Distributed team

🤓 Vision insurance

🦷 Dental insurance

🚑 Medical insurance

🏖 Paid time off

💰 401k matching

🏔 Company retreats

🏬 Coworking budget

💰 Profit sharing

🎅 We hire old (and young)

H1 is hiring a remote Big Data Engineer. This is a full-time position that can be done remotely anywhere in the United States.

H1 - Creating a healthier future.

Help Scout is hiring a remote Senior Frontend Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Help Scout - Simple customer service software and education.

We are seeking a skilled Smart Contract Engineer to develop secure and reliable smart contracts specifically for our robotics identity layer. This role is integral to bridging blockchain technology with robotics, enabling secure, verifiable, and scalable identity management solutions. Success in this role means deploying robust smart contracts, ensuring blockchain best practices are followed, and contributing to the advancement of decentralized robotics infrastructure. You will collaborate closely with robotics engineers, blockchain architects, and product managers to integrate innovative blockchain solutions into robotics platforms.

What Success Looks Like:

• Deploying reliable, secure, and efficient smart contracts.
• Seamless integration of smart contracts with robotics identity systems.
• Proactive identification and mitigation of potential security risks and vulnerabilities.
• Effective collaboration across engineering teams, contributing actively to system architecture decisions.
• Consistent adherence to coding standards, testing protocols, and best practices in blockchain technology.
• Responsibilities:
• Design, develop, test, and deploy Ethereum-compatible smart contracts using Solidity.
• Integrate smart contract solutions within robotics identity layers, ensuring compatibility and performance.
• Conduct comprehensive audits and tests of smart contracts to identify and mitigate security vulnerabilities.
• Maintain comprehensive technical documentation and ensure code transparency.
• Collaborate with cross-functional teams to define system requirements and blockchain integration strategies.
• Stay updated with emerging blockchain technologies, providing strategic recommendations on technology adoption.

Qualifications:

• Proven experience developing and deploying Solidity smart contracts in production environments.
• Strong understanding of blockchain fundamentals, Ethereum architecture, and decentralized applications (dApps).
• Familiarity with tools such as Hardhat, Foundry, or similar smart contract development frameworks.
• Experience performing smart contract audits and code reviews.
• Solid understanding of cryptographic protocols and secure coding practices.
• Excellent problem-solving skills and ability to work independently and collaboratively in a fast-paced environment.
• Strong verbal and written communication skills.
• Bachelor’s degree in Computer Science, Engineering, or a related technical field preferred, or equivalent professional experience.

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

Dropbox is hiring a remote Full Stack Software Engineer, Dropbox Sign. This is a full-time position that can be done remotely anywhere in Poland.

Dropbox - Keep life organised and work moving – all in one place.

ActiveCampaign is hiring a remote Senior iOS Engineer. This is a full-time position that can be done remotely anywhere in Poland.

ActiveCampaign - Grow your business with customer experience automation.

OpenSea is looking to hire a Staff Frontend Engineer to join their team. This is a full-time position that can be done remotely anywhere in the United States.

Job overview:

We’re looking for a Front-End Developer to join our team as we bring Cork to market and build out the product and developer ecosystem. This role is ideal for a developer who is not only skilled in front-end engineering and Web3 development but also has experience in designing onboarding funnels, managing product analytics, and building compelling data displays to optimize user activation, conversion and retention.

Key Responsibilities:

• Front-End Development: Build, maintain, and optimize our React/Next.js-based Web3 front-end.
• Web3 Integration: Implement smooth user interactions with smart contracts using ethers.js, viem, wagmi, and other Web3 libraries.
• User Experience Optimization: Identify and reduce friction in user flows based on behavioral data, funnel drop-off points, and user feedback.
• Performance Optimization: Enhance UI/UX speed, responsiveness, and accessibility.
• Ad-hoc Product Support: Provide insights on feature prioritization, UX design improvements, and A/B testing strategies.

Requirements

• 5+ years of experience in front-end development; 2+ years in blockchain preferred
• Proficiency in complex ABI-encoded data structures, including nested structs and dynamic types, handling decimals and rounding.
• Experience working with the Permit2 and ability to efficiently batch multiple on-chain calls using Multicall or similar meta-transactions
• Ability to filter smart contract event logs, identify storage slots for simulating smart contract calls and async loading using react.lazy, suspense and dynamic imports.
• Strong background with timeseries data with proficiency in rendering charts of different granularity using libraries like ECharts, AntV.vision, or ApexCharts
• Experience working with RESTful APIs and GraphQL Data Management techniques such as Schema Stitching, Subscriptions and Client-side Caching.
• Proven experience designing onboarding funnels and improving user activation and usage based on user behavior
• Understanding of UI/UX principles and ability to implement high-quality, conversion-optimized interfaces.
• Ability to work independently in a fast-moving, startup-like environment.

Customer.io is hiring a remote Technical Support Engineer. This is a full-time position that can be done remotely anywhere in Americas.

Customer.io - Power automated communication that people like to receive.

GitLab is hiring a remote Intermediate Backend Engineer (Golang), Platform Insights. This is a full-time position that can be done remotely anywhere in Canada, Europe or the United Kingdom.

GitLab - A single application for the entire DevOps lifecycle.

Chess.com is hiring a remote Senior Backend (Java & PHP) Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Chess.com - The world's largest chess community.

Stripe is hiring a remote Full Stack Engineer, Growth & SEO. This is a full-time position that can be done remotely anywhere in Spain.

Stripe - Online payment processing for internet businesses.

Role: Senior Fullstack Software Engineer

Remote: anywhere in the world

Blotato helps content creators go viral: https://www.blotato.com

Preferences: vim, emacs, fullstack, no hypechase js, ai

Tech stack: nextjs, fastify, typescript, supabase, heroku, aws

This is a fulltime, permanent position, no contractors/consultants.

Interested? apply with your resume and explain your favorite AI coding tool.

Salary and compensation

Benefits

🌎 Distributed team

🏖 Unlimited vacation

📚 Learning budget

🖥 Home office budget

⬜️ No whiteboard interview

👀 No monitoring system

🚫 No politics at work

🎅 We hire old (and young)

About Us

Chorus One is one of the leading operators of infrastructure for Proof-of-Stake networks and decentralized protocols. Tens of thousands of retail customers and institutions are staking billions in assets through our infrastructure helping to secure protocols and earn rewards. Our mission is to increase freedom and speed of innovation through decentralized technologies.

We are a erse team of around 75 people distributed all over the globe. We value radical transparency, striving for excellence and improvement while treating each other with kindness and generosity. If this sounds like you, we’d love to hear from you.

Role

As a Data Engineer, you will be responsible for the design, implementation, and maintenance of data pipelines that power user-facing products as well as internal tools. You will integrate with internal blockchain RPC nodes and third-party APIs to fetch stake and rewards data for multiple blockchains, and store and process this data to power internal reports and dashboards, as well as external customer reporting. You will play a critical role in enabling data-driven decision-making.

Our current data pipelines are implemented in Python, and run on a mix of Apache Airflow and Kubernetes, storing data in Postgres and Google Cloud Storage. We use various dashboarding and analysis tools, including Streamlit.

Responsibilities

• Implement data pipelines that ingest rewards, pricing and commercial contract data. Ensure data quality via automated sanity checks.
• Maintain automated workflows that make assets-under-management numbers and APY data available to our website and third parties.
• Develop and maintain internal dashboards for the presentation and analysis of company revenue data, assets under management, and a detailed breakdown of these numbers.
• Work with cutting-edge blockchain technology, so all of the above data is available at the moment when a new blockchain network launches.
• Collaborate with our Networks, Engineering, Finance, and Customer Success teams to understand data needs and deliver on business requirements.

Job requirements

What we are looking for:

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field
• Prior experience with Python and REST APIs
• Experience with SQL, preferably PostgreSQL
• Strong communication skills to collaborate effectively with both technical and non-technical stakeholders
• Familiarity with dashboarding tools such as Streamlit, Metabase, or Observable, and pipeline orchestrators such as Apache Airflow or Dagster
• Affinity or interest in blockchains and proof of stake. Prior experience is not a requirement, but definitely an advantage.
• You are able to work in the following time zone: Switzerland ± 6 hours

Our Offer

• Autonomy and ownership in a friendly and supportive work environment and the opportunity for rapid growth.
• Competitive fixed compensation (65k–110k USD commensurate with experience) + equity.
• Part-time optional, 80% – 100%.
• All-expense paid biannual team retreats at various destinations. Past retreats took place in Egypt, Serbia, Kenya, USA, South Korea, Dubai, Thailand, Spain, and Japan.
• Remote, but not alone. We are a strong global collaborative environment.
• Remote working budget (laptop, co-working space, etc.)
• Personal development budget
• Gather experience and build your network in the vibrant crypto ecosystem.
• Learn about state-of-the-art protocols that lay the foundation for an open, transparent, and programmable financial system.

Xapo Bank is looking to hire a Front-End Web Developer to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

We are seeking a backend engineer to contribute to our trading platform. You will develop, test, and maintain our API, working closely with smart contract and frontend engineers.

What we are looking for:

• A developer with deep experience building backend services on top of smart contracts
• Familiarity with DeFi
• A security-oriented mindset
• Experience writing clear documentation for end users is a plus

About

IFT is a mission-driven startup studio building public goods to safeguard civil liberties in the digital age. We build open source and decentralised technologies to push back against digital overreach — and now, we’re looking to go all-in on AI.

We’re hiring an AI Operations Engineer to help us integrate AI deeply and responsibly across everything we do. Learn more at free.technology.

Role

IFT is seeking an AI Operations Engineer with a strong technical background and a passion for decentralisation. This role is key to supporting the deployment, management, and coordination of AI-driven tools and systems across all of our projects. You’ll play a hands-on role in making AI systems function smoothly while interfacing across engineering, research and operations.

This is a unique opportunity for someone who loves to tinker with new tech, enjoys working with both code & people; someone who isn’t afraid of a steep learning curve. You’ll help to implement cutting-edge AI application pilots across the organisation to help capture success metrics, including; AI agents for financial summaries, automated onboarding for hiring, AI-powered analytics for portfolio management and querying internal knowledge systems.

Key Responsibilities

AI Tooling & Deployment

• Implement and support day-to-day operations of AI tools across multiple teams.
• Manage and monitor AI agents in production environments.
• Build and maintain pipelines for model deployment and iteration.

Cross-team Collaboration

• Interface with engineering, research, and operations teams to identify high-impact AI opportunities.
• Help teams articulate their needs and translate them into scalable AI workflows.
• Prioritise AI tasks by mapping them to real operational pain points.

Optimisation & Documentation

• Create documentation and support feedback loops for internal tools.
• Continuously evaluate and improve AI tool performance and user experience.
• Help build the systems and culture of an “AI-native” organisation.

Requirements

• 3–7 years in technical operations, DevOps, or IT with hands-on exposure to software tooling and automation workflows.
• Strong technical grounding: able to grasp key AI/ML concepts, data structures, APIs, and system architecture.
• Experience in, and/or a passion for Web3 & Blockchain technology
• Preferably, experience working with open-source communities or projects
• High emotional intelligence and proven stakeholder relationship management skills; comfortable interfacing with both deeply technical and non-technical contributors at IFT.
• Curiosity and humility, you should be willing to unlearn conventional ops models to help shape a native-AI org.
• Understanding of modern LLM tooling and platforms — e.g. LangChain, OpenAI APIs, vector databases (like Pinecone, Weaviate), and orchestration tools (e.g., LangGraph, AutoGen).
• Strong organizational skills and operational intuition.

Bonus skills

Previous experience working in agile, iterative, and distributed environments.

[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

• Interview with our Talent team
• Interview with Arwen, Chief of Staff
• Interview with Jonathan, People Operations Lead
• Interview with Corey, Head of Insights

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 $60,000 - $90,000 USD annually (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.

About CoW DAO

CoW DAO is on a mission to protect Ethereum users from MEV and optimize trade execution across DeFi. We achieve this through the CoW Protocol, CoW Swap (a leading intent-based DEX aggregator), and the innovative MEV Blocker, which together help secure, aggregate, and route trades for optimal outcomes. We also fund values-aligned projects via the CoW Grants Program.

CoW Protocol is consistently ranked among the top DEX aggregators by monthly volume and is the largest intent-based exchange. Our MEV Blocker protects trades from harmful MEV extraction and is integrated across the Ethereum ecosystem. The CoW AMM is the only live AMM designed to protect liquidity providers from LVR (loss-versus-rebalancing).

With over 100 open-source repositories on Dune Analytics dashboard showcases billions in cumulative trading volume and a rapidly growing user base. As we continue to scale, CoW DAO remains at the forefront of DeFi innovation, prioritizing security, efficiency, and decentralization.

Learn more

About the role

Location: We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in Europe or remote +/- 4 hours CEST time

Please note we’re not hiring from the US, Australia, or New Zealand

Position: Full-time contractor

We need a Site Reliability Engineer who’s hungry for impact, loves building things from scratch, and enjoys keeping critical infrastructure running like a well-oiled machine. You’ll be working with a team that values autonomy, ownership, and a growth mindset—if that sounds like you, keep reading! 🚀

What You’ll Do

• Keep things running smoothly – You’ll build, maintain, and optimize our Kubernetes workloads while ensuring scalable, resilient cloud infrastructure using Infrastructure-as-Code
• Build cool stuff – Automate deployments, reduce tech debt, and optimize AWS costs to improve infrastructure efficiency
• Shape the future of DevOps at CoW – Drive CI/CD workflow standards, contribute to platform architecture & security, and enhance on-call and postmortem processes to foster a strong DevOps culture
• Strengthen our blockchain infrastructure – Deploy and manage Ethereum nodes & validators, establish SLAs, and ensure high availability across our network
• Own reliability metrics – Establish SLIs/SLOs for our solver competition, RPCs, and trades; build and manage error budgets with stakeholders
• Lead operational excellence – Rotate with the on-call team, lead blameless retrospectives, and automate runbooks to continuously improve resilience
• Teach and share – We love knowledge sharing! Be ready to collaborate, mentor, and even lead a small presentation for the team
• Automate and optimize – Modify and extend Pulumi configurations for AWS, fine-tune deployments, and continuously improve alerting solutions
• Enhance observability & security – Improve logging architecture, security measures, and database health to ensure reliable infrastructure performance

Our Tech Stack

• Our SRE Stack: AWS, Kubernetes, Pulumi, Flux, Ansible, OpenSearch, Nginx, Prometheus, Grafana, Docker and Linux
• Blockchain Nodes: Erigon, Reth, Nitro

Who You Are

• Kubernetes Mastery – You’ve deployed and maintained production-grade K8s clusters before
• Cloud & DevOps Expertise – Strong experience with AWS, CI/CD, Docker, and Linux
• Blockchain Expertise? Even Better! – Experience running Ethereum nodes (or other blockchain infra) is a plus.
• On-Call Ready – You’re comfortable handling incidents and making sure things don’t break (or fixing them fast if they do!)
• Monitoring Pro – You know your way around Prometheus, Grafana, and Elasticsearch
• Database Knowledge – We use Postgres, but any database experience is a plus
• Coding Background – You’ve written production-level code in Python, Go, Rust, or similar for at least 1-2 years
• Team Player & Communicator – We’re a remote team, so documentation, knowledge sharing, and collaboration are key

What We Can Offer You

• Impact & Ownership – Your work will directly shape the future of DeFi.
• Flexibility – Remote-friendly with the option to join our Lisbon hub
• Token Plan – Be part of our mission and shape the future of CoW DAO
• Team Gatherings – Regular meetups & off-sites retreats to connect IRL.
• Well-being Learning Budget – We support your growth, mental health, active life style
• Hardware Budget – Get the setup you need to Moo 🐮

Ready to Join the Herd?

Hit that apply button and let’s chat! 🚀

Referral Program

Earn 5.000 USDC or USD with the refer-to-earn program. More details here.

Culture

Life within the CoW Protocol is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we’re all about feedback, coming together, and enjoying the journey along the way!

At CoW Protocol, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our erse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.

Chess.com is hiring a remote Senior Java Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Chess.com - The world's largest chess community.

We are looking for an experienced Solidity developer to work with our Rust-based team building cutting edge AVS-infrastructure. Your work will involve writing contracts and deploy scripts, and helping Rust devs properly interface with these contracts. We are building a multi-chain protocol based on Eigenlayer restaking, and you will are expected to have deeper EVM/Ethereum knowledge than any other teammate. You should feel comfortable making architecture decisions and recommendations on best integrations with Ethereum and other EVM-based chains.

Responsibilities:

• Writing secure Solidity Contracts
• Extending eigenlayer-middleware contracts
• Writing deploy scripts (solidity / bash / foundry)
• Providing solidity interfaces to the Rust team
• Participating in architectural discussions
• Providing recommendations on Solidity/Ethereum best practices
• Properly testing our Solidity-based infrastructure

Requirements

• 5+ years of professional software development
• 2+ years of production work on Solidity / Ethereum
• Experience with TDD and CI workflows
• Basic working knowledge of Rust
• Working knowledge of bash scripts
• Within 1 hour of CET timezone
• Good written and spoken communication in English
• Experience working in a remote team

Company Overview - Layer Labs

Layer is a fast-growing Web3 startup, launched in September 2024, with the mission to enable developers to build an entirely decentralized stack and create novel applications. We develop a Rust-based blockchain stack that supports decentralized compute for AVSs, GPU, storage, and ZK proofs, paving the way for the future of the web3 ecosystem. Our vision is to resurrect the true principles of web3, creating a trust-based, decentralized internet and shifting away from techno-feudalism. Recently, Layer announced a seed fundraising round of $6 million, with a valuation of $72 million, solidifying our position as a leader in decentralized infrastructure innovation.

Layer was co-founded by three blockchain pioneers:

• Jake Hartnell (CEO), who previously co-founded Juno, Stargaze and DAO DAO;
• Sam Cassatt (CBO), former Chief Strategy Officer at ConsenSys; and
• Ethan Frey (CTO), founder of CosmWasm and architect of key protocols like IBC for the Cosmos ecosystem.

Benefits

This is an hourly rate, contract-based position.

Our Culture:

• You’ll be hands-on, collaborating, and learning right away. We embrace creative complexity together.
• We are a full-stack organization with a strong engineering culture, which values open-source.

What We Offer:

• Remote working environment
• International, collaborative team
• Competitive fees

CrazyGames.com is an HTML5 browser games platform with 40M monthly active users from countries around the world. In just a few years, we’ve grown from a hobby project to a team of 35 experts. CrazyGames is now expanding its reach and looking for a remote Mobile App Developer.

You will be working in a small, fully remote engineering team where you will build and enhance our mobile applications for both iOS and Android. These apps primarily extend our Progressive Web App (PWA) foundation. The short-term plan is to enrich the current PWA with compelling native features to deliver the optimal mobile gaming experience. CrazyGames is already used by millions of users daily, providing a massive audience for your work from day one. While skills across both platforms are valued, we are particularly seeking strong iOS expertise to complement our team's current capabilities.

Key outcomes for the role:

• Within 1 month, you have a good understanding of the current architecture of the website and successfully built and shipped native features or enhancements within our mobile apps.

• Within 3 months, you have proactively identified and implemented a tangible improvement to mobile build pipelines, automated testing and development workflow, demonstrably saving time or reducing friction for the mobile development process.

• Within 6 months, you take ownership over significant mobile app features or modules (especially iOS-centric ones), managing them from scoping through development, testing, and release.

• Within 9 months, you propose architectural improvements to our mobile app codebase or the web-native integration layer, enhancing maintainability, performance, and future feature development.

On a typical day you might:

• Implement and refine both native and web UI elements and interactions based on designs for our iOS and Android apps.

• Develop and integrate native functionalities (e.g., push notifications, platform-specific APIs) that enhance the core PWA experience.

• Work on the bridge and communication layer between the web view and the native app shell.

• Propose and discuss mobile-specific user experiences and native integrations together with the designer, and product manager.

• Identify performance bottlenecks or areas for improvement in the mobile apps and refactor code or implement native solutions.

• Break down mobile-focused features or epics into specific tasks and discuss implementation strategies, especially for iOS, with the tech lead and team.

What we offer:

• Top-notch engineers as colleagues. We like to hire experts.

• A modern mobile development environment leveraging web technologies combined with native development (Swift for iOS, Kotlin for Android). Experience with bridging technologies is a plus.

• Your work directly impacts millions of users across the globe playing hundreds of millions of game sessions per month.

• A lot of responsibility and freedom. We hire only experts and trust them to deliver excellent results.

• Flexible working hours and location. The results are what count!

• Team weeks: we organize a week somewhere in Europe once or twice per year. We pay for transport and accommodation so you can have fun with the team.

• The opportunity to play games and claim it's work.

Reach out if:

• You have demonstrable experience developing native mobile applications, with a strong focus and deep understanding of iOS development (Swift/Objective-C and core iOS frameworks). Experience with Android (Kotlin/Java) is a significant plus.

• You have experience with or are eager to learn more about React web development.

• You have experience working with or integrating web views (WKWebView/WebView) or PWAs within native mobile applications.

• You have experience optimizing mobile applications for responsiveness, and smooth user experience across various iOS devices and versions.

• You can think from the perspective of the mobile user and understand platform conventions.

• You have experience interpreting mobile analytics to drive development choices.

• You are intelligent, efficient, and organized. You have an attention to detail.

• You like open, efficient, and to-the-point communication and you have experience working effectively in a remote team.

• Bonus points for experience with web-to-native bridging technologies (like Capacitor or custom implementations) or cross-platform frameworks (like React Native, Flutter) even if not directly used here.

Salary and compensation

Benefits

🌎 Distributed team

⏰ Async

🏖 Paid time off

🏔 Company retreats

🏬 Coworking budget

📚 Learning budget

🖥 Home office budget

💰 Profit sharing

⬜️ No whiteboard interview

👀 No monitoring system

🚫 No politics at work

"

As a Front-End Engineer at Eloquent AI, you’ll play a central role in shaping the interfaces that connect humans and AI in high-stakes enterprise environments. You’ll work closely with our product designers, AI engineers, and backend developers to build clean, fast, and intuitive UIs for our AI agents and dashboards.

This role is ideal for someone who thrives in fast-moving, design-conscious environments, is excited by the challenge of creating seamless user experiences for complex AI workflows, and who brings technical excellence and a deep attention to detail.

You will:

* Build beautiful, performant UIs that make AI-powered tools intuitive and powerful for enterprise users.

Requirements:

* 3+ years of experience in front-end development, preferably building SaaS or AI-powered applications.

Bonus Points If…

* You’ve built interfaces for AI or data-intensive applications.

",

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

Mercury - Banking built for startups.

We’re on the lookout for a talented full-stack engineer with a passion for artificial intelligence! You’ll be responsible for building both front-end and back-end solutions, while seamlessly integrating AI features into our applications. If you’re excited about working with cutting-edge tech in a fast-paced, dynamic environment, we’d love to hear from you!

What you’ll do:

• Build user-friendly and efficient front-end solutions
• Design and maintain back-end systems that integrate smoothly with AI technologies
• Bring AI capabilities to life in both new and existing applications
• Work closely with cross-functional teams to deliver top-quality products

The Opportunity

As a Backend Engineer on the Nascent engineering team, you will design and build the next generation of our world-class trading system. You’ll take ownership of critical components, including design, implementation, and maintenance, and integrate directly with financial exchanges. From developing backend architecture in Rust to rigorous code reviews and testing, you’ll champion quality engineering practices across your work. Along the way, you’ll bring structure to ambiguous problems, help shape system architecture and interface design, and serve as an integral partner to our trading team.

You’ll thrive in this role if you love having the freedom to move fast, think creatively, and solve tough problems with a builder’s mindset. You care deeply about doing things right without getting bogged down, you’re comfortable adapting quickly as requirements evolve, and you find as much joy in starting a project as you do in refining and optimizing it over time. If you’re excited to e deep into Rust, contribute to complex and iterative system development, and help shape the future of trading and crypto, we’d love to work with you. This is a remote position with opportunities for in-person collaboration, requiring core working hours within 5 hours of Eastern Standard Time.

Responsibilities

• Architect, design and build the next phase of a world-class trading system.
• Support development and implementation of a backend, microservice-driven, Rust architecture.
• Ensure resilience and stability through quality code reviews, unit, regression and user acceptance testing, and apply and be a proponent of quality engineering practices.
• Use documentation and specifications to build integrations between selected exchanges and our internal systems.
• Take full ownership of multiple components including design, implementation, and maintenance.
• Bring clarity and structure to ambiguous problems, identifying key requirements and proposing actionable solutions.
• Contribute to system architecture and interface design.

About you

• You crave autonomy and agency to deliver against a shared vision and find real joy in providing solutions to complex problems
• You are resourceful and can toe the line between moving fast and breaking things and moving methodically to get things right the first time
• You are as excited by starting a project as you are completing, maintaining and continually optimizing it
• You proactively contribute creative ideas and novel approaches to product and engineering challenges, pushing the boundaries of what’s possible.
• You are extremely agile and have a strong ability to adapt quickly to evolving requirements.
• You thrive in less structured environments and are at your best when driving and delivering results with the freedom to build and execute your own plan

Preferred experience

• 2-8 years of full-time software engineering experience, ideally as a systems programmer (Rust, C++, GO). Bonus if you have experience with and/or interest in learning Rust.
• Experience beyond testing (e.g. quality processes, verification & validation)
• Experience building scalable, performant, production-level applications with regular release cycles
• Performance sensitive engineering including multi-threading, streaming data, and concurrency
• Distributed systems, micro services
• Experience building trading systems is a strong plus, with an interest in and enthusiasm for financial markets or the crypto space.

About Nascent…

Founded in 2020, Nascent exists to build, expand, and capture opportunity, in open markets and permissionless technologies. Building from a base of permanent capital, we deploy assets across a range of both liquid and long-term strategies that ensure we are among the most active users of the open financial system we are helping to build. We’ve made venture investments in 100+ early-stage teams that we believe have the potential to create substantive change, expand boundaries, and find new horizons. We are consistently on the hunt for the most competitive and curious minds exploring the edges of the crypto ecosystem and leverage our hyper flexible structure to accelerate ideas into fully deployed strategies.

Our Team & Culture

At Nascent, we are an interdisciplinary team of investors, builders & creators, capable of achieving more together than we can as iniduals. We offer the opportunity to contribute to building the future global economic system with a world-class team and culture that pairs the freedom to explore, experiment & play with a competitive drive to win. We invest in our people by providing the autonomy to build, coupled with accountability & honest feedback to help learn, grow, perform & win. Our distributed team understands the value of in-person time—we encourage team members to come together for more frequent in-person work.

Principles that drive our team & work

• Compete to win
• Explore, experiment, play
• Always be building
• Seek and speak truth
• Own your shit.

What We Offer

At Nascent, we offer a competitive total compensation package heavily weighted toward bonus, ensuring that when we perform at our best and the firm wins we all win.

• The opportunity to learn, experiment and build in an entrepreneurial environment
• Remote and distributed working environment
• Comprehensive health benefits package including dental, vision, and life
• 16 weeks fully paid parental leave & supported return to work
• Home office setup and stipend or coworking space and wellness stipend
• Retirement plan matching contributions
• Open vacation policy as well as flexible work hours and location
• Team activities and in-person team retreats

We are an equal opportunity employer and celebrate ersity and differences of perspectives. We do not discriminate on the basis of any status, inclusive of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

VDEX is a fast-growing DeFi startup focused on building a decentralized perpetual exchange. VDEX is backed by Binance Labs and Gate Exchange and passed $10 million in volume last month.

Powered by Virtual Rollups, the VDEX architecture is designed to overcome the performance and cost limitations of traditional blockchain systems by allowing the users to trade with instant finality, ZeroGas fees and omnichain (trade among different chains without requiring any bridge).

VDEX offers competitive salary and generous equity/token.

Level: Mid to Senior

Responsibilities

• Collaborate with senior developers and blockchain engineers to design and develop backend services in Golang for our DeFi platform and improve our frontend in Typescript.
• Maintain and improve existing backend, frontend, and our smart contracts on EVM chains.
• Write clean, efficient, and well-documented code.
• Participate in code reviews and contribute to improving engineering practices.
• Support integration with new features and DeFi protocols.

Requirements

• Solid programming skills in Golang (Go) and Typescript, or willing to learn.
• Understanding of blockchain fundamentals and DeFi concepts like EVM, tokens, yields.
• Strong backend engineering experience, including designing APIs, services, and distributed systems with a focus on reliability and performance.
• Clean code principles: writes well-structured, readable, and testable code, adheres to SOLID principles and practices good software design patterns.
• Previous experience in remote first team, or ability to work independently in a remote-first team.
• Knowledge of basic cryptographic principles and key management.
• Comfortable using Git, Docker, AWS and CI/CD tools.
• Good communication and collaboration skills.
• Self-starter mindset and willingness to learn fast.

Nice to Have

• Understanding of traditional finance concepts like order books, perpetuals and trading concepts.
• Ability to reason in mathematical terms and provide formal arguments of correctness and security of a system.
• Experience working with smart contracts (Solidity).
• Familiarity with Ethereum and etherjs library.
• Contributions to other open-source projects or previous work in DeFi and crypto.
• Understanding of performance tuning, observability, and distributed tracing in backend systems.

Automattic is hiring a remote Experienced Software Engineer. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Automattic - We are passionate about making the web a better place.

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

Udacity - Advance your career with online courses.

Solana Foundation is looking to hire a Technical Project Manager, Ecosystem to join their team. This is a full-time position that can be done remotely anywhere in the United States.

0x is looking to hire a Senior Design Engineer, Matcha to join their team. This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Reddit is hiring a remote Staff Data Scientist, Consumer. This is a full-time position that can be done remotely anywhere in the United States.

Reddit - The front page of the internet.

HashiCorp is hiring a remote Sr. Developer Advocate. This is a full-time position that can be done remotely anywhere in the United Kingdom.

HashiCorp - Cloud infrastructure automation.

Who We Are And What We Do:

Contra is a network of independent creatives, connecting you with the talent and tools to get work underway. Our platform offers all the necessary tools for discovering, hiring, onboarding, managing, and paying flexible talent.

Why Join Contra's Journey?

Contra is building the platform for the future of work. People, companies, and agencies are looking to adopt more flexible working styles, and we are leading the way, with a network of over 1M freelancers and 50k clients who depend on Contra to work together and collaborate, 100% commission-free. We’ve raised over $44M from top VC’s including NEA, Unusual Ventures and Cowboy Ventures.

About You:

• You are an excellent, independent problem solver.
• You have high standards for craft, quality, and attention-to-detail for the work that you ship, and motivate others to raise the bar.
• You know how to articulate and balance the tradeoffs of rapid pace exploration and building performant, scalable, reliable, and quality systems.
• You have high standards for verbal and written communication and are experienced at working in a remote organization, preferring to over-communicate and collaborate synchronously when able.
• You thrive in a fast-paced and dynamic environment. Our team knows how to execute and is relentless about our velocity.
• You apply an ownership mentality to everything you ship, and collaborate cross-functionally with other teams to achieve success.
• You dedicate effort to staying up to date with new technologies, patterns, and AI.

In a day at Contra, you’ll probably:

• Contribute to our end-to-end TypeScript, GraphQL, React monorepo.
• Contribute to our Vitest/Playwright test suite.
• Participate in the RFC process, building alignment around new database and API schemas and new patterns.
• Participate in all parts of the product development process, like design critiques, code reviews, and cross-functional planning with your team.
• Work on maintaining a tidy home: eliminate technical debt, improve performance, address customer bugs, improve developer experience, etc.

Our Stack:

• Backend: TypeScript, PostgreSQL, GraphQL, NodeJS, Redis, Temporal
• Frontend: React, Relay, PandaCSS
• Data: Airbyte, dbt, Google BigQuery
• DevOps: ArgoCD, Docker, GitHub, Google Cloud Platform, Kubernetes
• Testing: Playwright, Vitest
• Tools: Linear, Mergify, PostHog, Slack, Turbo
• AI: OpenAI, Cursor, Supermaven, CodeRabbit (for code reviews — it’s actually great!)

Total Comp:

• Salary: $170,000 - $200,000 CAD
• Health + dental benefits
• Home Office Budget
• We will provide you with a company laptop on your start date

Interview Process

1. Intro Call with Recruiting Team (15-20 minutes)
2. Technical Interview with Hiring Manager (45 minutes)
3. Culture & Cross-Functional Interview (45 minutes)
4. Paid Technical Assessment (3 hours) + Presentation (60 minutes)
   1. CTO & Co-Founder
   2. Engineering Manager

Contra is an equal opportunity employer, committed to ersity and inclusion. We do not discriminate based on race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

Note: Contra communicates with applicants through @contra.com domains only. We never ask for money from potential employees. For the latest job postings, visit Contra Careers.

Salary and compensation

**公司简介：

2UP.io 是一个全新且令人兴奋的在线赌场和体育博弈平台，正准备正式上线。我们是从一个在全球范围内极具知名度的品牌中衍生出来的，该品牌曾是多名英超联赛足球队的主要赞助商。我们专注于下一代的iGaming（在线博弈），尤其是在加密货币、原创游戏、体育和电子竞技方面，致力于在全球舞台上发挥重要作用。Test site: 2uptest.com, password = 8888

**职位介绍：

我们正在寻找一位经验丰富、注重细节且责任心强的测试主管，加入我们全球化的在线加密赌场平台。该岗位将全面负责测试团队的搭建与管理，确保平台在快速迭代中保持高质量交付。您将直接与产品、技术、项目等团队协作，制定并优化测试流程、方法与标准，确保软件在功能、性能、安全等方面达到行业一流水准。

如果您拥有丰富的测试经验、出色的沟通能力，以及在细节和逻辑判断上极高的敏感度，我们期待您的加入，共同打造一个稳定、安全、极致体验的博彩平台。

**理想候选人：

**

您是一位对产品质量和用户体验高度执着的测试专家，具备全面的测试实战经验与成熟的团队管理能力。您曾主导多个复杂系统或数据敏感型产品的测试项目，擅长从0到1搭建测试流程与标准，并能够在快速迭代的节奏中精准识别风险与关键缺陷。

您学习能力强，能够迅速理解产品业务与技术方案，具备根据需求编写测试用例、拆解测试任务并组织实施的能力。您熟悉各种测试工具与方法，具备手动与自动化测试的全面能力，并对数据正确性、逻辑严谨性有极高的敏感度。您注重细节、思路清晰，能高效整理并呈现测试文档与分析报告，同时善于跨部门沟通，推动产品不断优化。

如果您具备博彩、加密货币、金融、电商等对数据要求高的产品背景，并拥有带领远程测试团队的经验，将是极大的加分项。我们期待您带领团队，在保障平台稳定性的同时，为用户提供极致体验的产品质量保障。

**岗位职责：

• 领导测试团队，制定测试战略、测试流程及测试规范，保障平台各模块质量稳定；

• 设计、编写并执行复杂和详尽的测试用例，覆盖核心功能模块及边界场景；

• 负责测试计划、测试报告、回归测试、上线验收等全流程管理；

• 组织并推动自动化测试策略，持续优化测试覆盖率与效率；

• 精通并操作测试工具（如 Selenium、Postman、Cypress、JMeter、TestRail、JIRA 等）；

• 执行 API、压力、性能、安全等专项测试；

• 敏锐识别缺陷，协助研发定位问题根因，提出合理化建议；

• 熟悉测试数据类应用的逻辑与验证机制，对数据正确性与逻辑链条有高度把控；

• 与产品、开发、设计、项目团队保持高效协作，参与评审与需求澄清；

• 对测试中发现的问题进行整理、分析、可视化汇报与演示，为产品质量提供有力依据；

• 在不断变化的需求和产品迭代中持续推进测试流程优化，确保质量与效率的双重提升。

**任职要求：

**

• 经验：至少4年作为QA测试相关经验，能够在软件开发生命周期的各个阶段执行有效的测试流程；

• 团队管理：具有带领测试团队并进行项目管理的经验优先，有手动和自动化测试经验者优先；

• 技能: 掌握软件测试的相关知识，能够熟练运用Selenium、Cypress、JIRA和TestRail等测试工具执行测试用例、跟踪缺陷及进行回归测试；

• 思维模式：具备逻辑思维和问题解决能力，能够迅速适应并处理复杂的测试场景。在面对复杂的项目需求或不明确的测试规范时，保持灵活性和韧性至关重要；

• 协作能力：具备良好的协作、责任感、情绪管理与跨部门沟通能力，推动测试与产品开发高效衔接；

• 测试工具: 熟练使用 Selenium、Cypress、Postman、TestRail、JIRA 等主流测试工具，熟悉 RESTful API 测试、性能测试工具（如 JMeter）及测试数据管理；

• 测试技能：熟练掌握功能测试、回归测试与自动化测试，具备完整测试流程实战能力，优先考虑具备复杂系统或数据敏感型产品（如博弈、金融、数据平台等）测试经验者；

• 数据分析：对数字敏感，高度注重细节与数学逻辑严谨性，能准确校验公式及数据处理逻辑，仔细分析测试结果，清晰记录缺陷并确保问题及时处理；

• 文档呈现：具备出色的文档能力，能将测试结果、Bug描述、分析结论清晰呈现；

• 问题解决能力：极强的问题分析与解决能力，能在多线程、多模块环境中快速定位并复现问题；

• 软技能：协作、沟通、主动性、责任感和情商是这一角色的核心能力；

• 沟通能力：拥有优秀的沟通能力，能够清晰地汇报测试结果、提出改进建议，并与团队成员进行有效的沟通和反馈；

• 语言能力：中英文阅读能力良好，能理解技术文档及中英文界面者优先。

**加分项：

**

• 熟悉中国及全球在线博彩市场和产品；

• 熟悉Online Crypto Casino在线博彩市场和产品；

• 有搭建测试框架、引入 CI/CD 流程、构建测试报告系统等经验；

• 熟悉加密支付、钱包、体育游戏、Slot 等模块测试流程；

• 有国际化测试协作经验，或能胜任多语言环境下的多平台兼容性测试。

Eyeo is hiring a remote Frontend Engineer (Growth). This is a full-time position that is 100% remote with no geographical restrictions. Work remotely from anywhere.

Eyeo - Develops open source software and makers of AdblockPlus.

Apollo is hiring a remote Developer Advocate, Growth. This is a full-time position that can be done remotely anywhere in the United States.

Apollo - We help developers build great apps.

Infrastructure & DevOps Engineer at Raiku

As an Infrastructure & DevOps Engineer at Raiku, you will lead critical engineering efforts that drive the performance and scalability of next-generation distributed systems. You’ll join a highly proficient team of core engineers, all of whom have contributed to foundational and novel infrastructure innovations.

We believe in hiring exceptional iniduals who are deeply motivated by complex core infrastructure challenges and guided by a coherent system design philosophy that moves our industry forward. Expect frequent group discussions on architecture, design specs, and code reviews. We ship quality code quickly and often — and we are deeply committed to it.

About Raiku

Raiku is reimagining Solana’s transaction and consensus ecosystem by enabling validators to connect directly with purpose-built execution environments. Our platform delivers unprecedented performance, guaranteed transaction inclusion, and deterministic settlement for the next generation of internet-native applications. We unlock radical bandwidth and latency improvements by shifting Solana’s focus to efficient state verification — enabling high-velocity, reliable applications at massive scale​.

About the Team

Our entire platform is built in Rust, connecting Solana’s L1 with advanced L2 extensions and enabling deeply complex network interactions. Your primary focus in this role will involve Rust systems programming, infrastructure architecture (e.g., Kubernetes), and operational scripting across languages such as Rust, Go, and Typescript. Full-stack understanding — from bare metal to application interfaces — is critical to success here.

What You’ll Bring

• 4+ years of experience in infrastructure engineering, preferably within high-standard fintech, data, cloud, or DevOps environments.
• Senior-level experience as an SRE or Infrastructure Engineer with a strong Kubernetes background.
• Deep proficiency with Infrastructure as Code tools (Terraform/Terragrunt) and infrastructure automation (Helm, GitOps).
• Familiarity with monitoring and alerting using Prometheus and PromQL.
• Experience with infrastructure and data security practices, including KMS and HashiCorp Vault.
• Ability to ship high-quality, opinionated architectural choices and uphold software best practices.
• Strong communication skills in English (both written and spoken).

Our Stack

• Infrastructure: AWS/GCP + bare metal, Kubernetes, Terraform/Terragrunt, Prometheus/Thanos, Helm, HashiCorp Vault, FluxCD
• Languages: Rust, Golang, Typescript, PostgreSQL
• Smart Contract Development: Anchor, Solana Program Library (SPL)

Preferred Qualifications

• Experience operating validators on distributed networks.
• Active engagement with the blockchain security research community, through open-source contributions, publications, or speaking at conferences.

Benefits

• Competitive compensation packages based on ongoing market analysis, including tokens.
• Remote-first culture with flexible hours — self-initiative and independence are highly valued.
• Work with highly talented engineers passionate about building the future of the internet.
• A collaborative and dynamic work environment that rewards inidual ownership and impact.
• Opportunities for rapid professional growth within one of the most technically ambitious projects in web3.

About the Role

As a Protocol Research Engineer at Raiku, you’ll e deep into Solana’s consensus mechanisms, validator dynamics, and block-building edge cases to help push the boundaries of what’s possible on-chain. Your work will directly inform and evolve Raiku’s infrastructure — including ahead-of-time auctions, deterministic inclusion, and decentralized execution environments.

This role is ideal for an engineer who obsesses over protocol-level behavior, from slashing conditions and fork choice rules to novel token incentive structures and inclusion guarantees. You will collaborate closely with our core engineering team, lead technical research deep-es, and shape future SIMD proposals and Raiku-native designs.

Core Responsibilities

Protocol Research & Development

• Analyze Solana protocol changes (SIMDs) and model their impact on consensus, block production, and validator incentives.
• Explore alternative leader schedules, transaction scheduling policies, and failure recovery mechanisms.
• Design and prototype changes to Raiku’s validator sidecar, ackermann-node, and execution environment logic.

Incentives & Economics

• Simulate and reason about token-level economics (e.g. fee markets, slot auctions, stake redistribution) in the context of Raiku’s architecture.
• Collaborate with the team on reward structures that align validators, apps, and execution primitives.
• Contribute to internal tooling for simulating validator behavior under new fee models or coordination layers.

Research & Thought Leadership

• Write internal memos and public-facing research exploring protocol edge cases, inclusion determinism, and priority fee market design.
• Lead technical discussions and workshops across the team and ecosystem partners.
• Represent Raiku in upstream governance and protocol forums (e.g., GitHub SIMDs, community calls).

What We’re Looking For

• Deep understanding of Solana’s architecture, consensus algorithm (Tower BFT), and validator mechanics.
• Proficiency in systems programming (Rust or C++) and experience working with validator or node clients (Agave, Jito, etc.).
• Comfort reasoning about distributed systems, forks, slashing, transaction lifecycle, and fee markets.
• Demonstrated ability to write clear, technical research — either internal design docs or public content.
• A rigorous, systems-level thinker who thrives in ambiguity and wants to help shape the frontier of internet-scale consensus.

Bonus Points

• Experience contributing to SIMD proposals or L1 protocol development (Solana, Cosmos, Ethereum, etc.).
• Familiarity with execution environments (SVM, EVM, Move) or decentralized scheduling infrastructure.
• Interest in MEV mitigation, slot auctions, or validator tokenomics.
• Past experience in distributed systems research, zero-knowledge design, or compiler/runtime engineering.

Why Join Raiku?

Raiku is building a high-performance execution layer atop Solana that enables guaranteed transaction inclusion, pre-confirmations, and slot-level coordination — unlocking a new design space for ultra-reliable onchain apps. We’re backed by leading investors, deeply technical, and shipping fast.

• Work with a world-class engineering team building core infrastructure from first principles.
• Help define the next evolution of block production and validator coordination on Solana.
• Remote-first, async culture optimized for focus, ownership, and velocity.
• Competitive salary + meaningful token upside.
• Home office and workstation setup stipend.

About Chainlabs

Chainlabs is a data startup focused on enabling web3 analytics. We specialize in identifying blockchain address ownership and tracking addresses linked to illicit activities. Our work supports industry leaders like Nansen, Chainalysis, and Arkham in their wallet labeling efforts.

Our primary clients include anti-money laundering (AML) service providers, as well as law enforcement, traders, and academic researchers. Backed by Lunar Rails (200 employees), Chainlabs maintains the agility and independence of a startup while benefiting from financial stability and strong industry connections.

Position Overview

We are seeking a Senior Back End Engineer to develop key data pipelines, including web scrapers, ETL workflows, and AI agents. Your work will enable us to extract critical data from clearnet and darknet platforms and power our blockchain intelligence solutions.

In this role, you’ll design high-performance systems that move data seamlessly into PostgreSQL and BigQuery environments. By tackling complex challenges in web scraping and data engineering, you’ll help us collect, organize, and analyze the web3 ecosystem at scale.

Key Responsibilities

Web Scraping**:

• Design and deploy web scrapers to extract data from complex websites like Etherscan, Arkham, ChainAbuse, etc.
• Implement data collection mechanisms with support for IP rotation, CAPTCHA handling, and dynamic content rendering.
• Help us build Crawlers and Scrapers to find hidden web3 wallets on the Darknet.

Data Engineering**:

• Build and maintain ETL pipelines to ingest scraped data into PostgreSQL or Bigquery.
• Classify the collected web3 wallets into predefined categories (e.g., Swap, Bridge, Scam, Ransomware) according to our taxonomy definitions.

API Maintenance**:

• Maintain and enhance Chainlabs API endpoints to provide seamless access to the data.
• Utilize Python frameworks (e.g., Flask) to support and extend RESTful APIs.

Data Analytics**:

• Use SQL to analyze on-chain data, ie, the behavior of collected wallets, their interaction with other entities, and other on-chain trends

Requirements

• Proficiency in Python for data engineering, web scraping, API development; and databases like PostgreSQL.
• Experience with frameworks such as Scrapy, Selenium and BeautifulSoup.
• Understanding of advanced Web Scraping techniques, including IP rotation, proxy management, and CAPTCHA handling.
• Familiarity with modern AI models, APIs, and SDKs (e.g. OpenAI, LLMs).
• Hands-on experience with ETL orchestration tools like Apache Airflow
• Strong problem-solving and not afraid to work with a wide variety of data.
• Ability to work independently and meet deadlines in a remote environment.
• A passion for blockchain and web3 technologies. An interest in combatting financial cybercrime.
• *Nice to Have: Familiarity with RESTful API development using_ Flask framework.
• Nice to Have: Strong experience with SQL and some exposure to Javascript.
• Nice to Have: Experience with on-chain analytics

Benefits

• Competitive salary.
• Remote work environment with a flexible schedule.
• A team that values data and AI; our founder is a data scientist.
• A company culture that values transparency, speed, courage, and curiosity.
• Opportunities for fast personal and professional growth.
• Exposure to a global network of industry experts and partners.

QuickNode is looking to hire a Support Engineer II to join their team. This is a full-time position that can be done remotely anywhere in Portugal or Spain.

*About CoW DAO

CoW DAO is on a mission to protect Ethereum users from the dangers of DeFi. It does this by supporting the development of CoW Protocol, CoW Swap, MEV Blocker, and CoW AMM, and by funding values-aligned projects through the CoW Grants Program.

CoW Protocol is the second-largest DEX aggregator by monthly volume and the first-largest intents-based exchange. MEV Blocker is currently involved in ~4% of all Ethereum transactions, making it the category leader. CoW AMM is the only live AMM that protects LPs from LVR (loss-versus rebalancing).

As a member of CoW DAO’s core team, you will have the opportunity to shape these essential products, and contribute to the Ethereum ecosystem more broadly.

About the role**

Location: We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in Europe or remote +/- 4 hours CEST time

Please note we’re not hiring from the US, Australia, or New Zealand.

Position: Full-time contractor

We are looking for an enthusiastic, self-motivated, Senior Backend Engineer to help us build the next generation of decentralised trading protocols. As a dedicated backend engineer, you will gain ownership of our existing backend services and influence the creation, design, and execution of future features and products. You will work on technically challenging aspects of our off-chain services and our developer-facing APIs and help ensure the delivery of reliable and performant features to improve CoW Protocol.

Our Tech Stack

• Backend Code: Rust, Tokio, Cargo, Git (https://github.com/cowprotocol/services)
• Infrastructure: Pulumi, AWS, Docker, Kubernetes, Grafana, Prometheus, Elasticsearch
• Other codebases: Typescript, Python, Solidity

What you will do

• Architect and design our off-chain services (core auction protocol as well as the orderbook) to support feature growth and the rapidly changing requirements that come from being an application on a constantly evolving blockchain.
• While your focus will be writing concurrent backend systems in Rust, you will also interact with our Smart Contracts written in Solidity and develop your understanding of auction mechanisms and DeFi protocols
• Participate in our on-call rotation to help ensure the reliability of our production systems (on-call work is additionally compensated)
• Work closely with researchers and the product team to ship features and come up with new solutions for challenging technical problems
• Deliver high-quality code for features from concept until production (including state-of-the-art monitoring of our production systems)
• Give thoughtful and in-depth code reviews of your colleagues’ contributions to our open-source codebase

Who you are

• You have 5+ years of production experience with systems-level programming languages, with at least 1+ year of hands-on production experience using Rust
• You have practical experience working in web3 (ideally in DeFi and the Ethereum ecosystem)
• You have excellent computer science, programming, and algorithmic skills
• Experience with operating, maintaining, and architecting complex software systems
• You care deeply about the quality, readability, observability, and testability of your code
• You proactively give technical direction to improve performance, prevent issues, optimise data usage, and refactor the codebase
• You are a team player, strong communicator, and gladly share your expertise with others
• You collaborate effectively with a remote-first team on a large, open-source codebase
• Ideally, someone senior who can mentor colleagues and provide direction.
• You are excited to explore and gain experience with Ethereum

What we can offer you

• Flexible work environment: Join our hub in Lisbon or work remotely
• Token plan: Have a stake in our mission and shape the future of CoW DAO
• Periodic gatherings: Enjoy opportunities to connect with the rest of the team through regular trips
• Conference allocation: Stay up-to-date with ecosystem advancements using our conference budget
• Learning budget: Use our learning budget to support your higher ambitions
• Hardware budget: Take advantage of a hardware budget for acquiring necessary equipment
• Make an impact: You are joining a startup where you can make a huge difference. Your work matters!
• Flat hierarchies mean fewer processes and bureaucracy - see more of your ideas come to life!
• Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance
• Growth: If you’re someone who loves taking the initiative and getting things done, CoW offers lots of opportunities for your inidual growth

Referral Program

Earn 6.000 USDC or USD with the refer-to-earn program. More details here.

Culture

Life within the CoW Protocol is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we’re all about feedback, coming together, and enjoying the journey along the way!

At CoW Protocol, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our erse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.

Udacity is hiring a remote Back-end Engineer II. This is a full-time position that can be done remotely anywhere in the United States.

Udacity - Advance your career with online courses.