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’re looking for an experienced Backend Team Lead who will manage and guide our engineering team while also being highly technical. This person will help resolve problems, offer mentorship, and ensure the team delivers clean, maintainable code while avoiding over-complication. You’ll work closely with our Tech Lead, collaborating on both high-level technical decisions and hands-on execution to drive the team’s success.

This position is a mix of technical expertise and people management—ensuring that the team has everything they need to succeed, both technically and personally.

What you will do

• Lead, support, and mentor the backend team: Guide team members in developing their technical skills, improving performance, and overcoming challenges while providing mentorship, feedback, and opportunities for career growth
• Encourage clean and simple solutions: Foster a development culture that prioritizes simplicity, efficiency, and streamlined workflows to enhance productivity and maintainability
• Code reviews and technical guidance: Perform code reviews, provide constructive feedback, and ensure that the team’s code adheres to best practices and high-quality standards
• Work closely with the Tech Lead: Collaborate closely with the Tech Lead to support the team in implementing solutions, overcoming obstacles, and ensuring smooth development processes
• Problem-solving: Identify roadblocks or inefficiencies in the team’s processes and help resolve them in a way that aligns with CoW’s long-term goals
• Collaborate with cross-functional teams: Work closely with product, research, and other engineering teams to ensure smooth delivery of features and high-quality results

Our Tech Stack

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

Who you are

• Technical expertise: You have experience in backend development (languages such as Rust, Go, Python, etc.) and building distributed systems. While Web3 experience is a plus, it’s not a requirement.
• People-oriented leader: You have experience leading teams, providing mentorship, and fostering a growth-oriented environment. You know how to motivate people, resolve conflicts, and build trust within a team
• Tech-Savvy Leader: You can step in and help with complex technical challenges, but your main focus is on the people and processes
• Simplifying Solutions: You care about and understand the importance of keeping things simple and ensuring that the team follows best development practices
• You work well with others: You have a collaborative mindset and can work with both technical and non-technical team members and ensure everyone is aligned with the team’s goals
• Code quality: You are experienced in code reviews and are passionate about helping team members improve through constructive feedback
• Remote team leadership experience: As a remote-first company, we need a Team Lead with a strong track record of managing fully remote teams, fostering collaboration, and maintaining high engagement and productivity across different time zones
• Excited about web3: While you don’t need prior web3 experience, you’re eager to explore the space, especially with EVM chains, and learn more about DeFi and blockchain technologies

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 individual 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 diverse 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.

📍 Remote | ⏳ Full-time | 🌍 Elys Network

Build the Future of DeFi on Cosmos

Elys Network is a high-performance Layer-1 blockchain built on Cosmos SDK, designed for universal liquidity and next-gen DeFi applications. Our flagship product, UniFi, is redefining decentralized trading with on-chain order execution, liquidity aggregation, and yield generation.

We’re looking for a senior-level blockchain engineer (5+ years experience) who thrives in a structured setting with a steady rhythm but is just as comfortable charting unknown territory, solving complex problems, and rolling up their sleeves when necessary.

We respect work-life balance, but when urgent situations arise (rare, but real), you’re the kind of person who steps up to ensure everything runs smoothly—even if it means working outside normal hours on occasion. The most innovative products are built by those who embrace both structure and the unknown, adapting with intention and vision.

🚨 Disclaimer: If you’re not deeply involved in DeFi and blockchain protocol development, please don’t apply. This role requires expert-level knowledge of Cosmos SDK, CosmWasm, and blockchain architecture.

Your Impact

⚡ Blockchain Protocol Development

• 5+ years of experience designing and optimizing high-performance blockchain infrastructure on Cosmos SDK.
• 3+ years developing and deploying CosmWasm smart contracts for DeFi applications.
• Architect and maintain on-chain order execution, staking, and liquidity aggregation mechanisms.
• Enhance cross-chain interoperability through IBC integrations and custom relayers.

🔗 Blockchain Security & Optimization

• 3+ years working with security-first blockchain practices, including gas efficiency optimization, mempool processing, and transaction finality.
• Monitor network health, validator performance, and chain upgrades to ensure stability.
• Implement MEV mitigation strategies, front-running protections, and advanced transaction handling.

🚀 Leadership & Adaptability

• 5+ years of leadership or senior engineering experience, guiding teams in blockchain development.
• Mentor and review the work of junior and mid-level blockchain engineers.
• Collaborate closely with front-end engineers, product teams, and ecosystem partners.
• Thrive in ambiguity—some days require methodical planning, others demand quick decision-making in uncharted territory.
• Be flexible when urgency demands it—it’s rare, but when the stakes are high, we show up.

🛠️ Must-Have Skills (Senior-Level Experience)

• 5+ years in blockchain development, with deep expertise in Cosmos SDK and Tendermint.
• 3+ years of smart contract development, specializing in CosmWasm and Rust.
• 3+ years working with staking modules, IBC transactions, and cross-chain communication.
• 5+ years of experience in DeFi mechanics, including AMMs, lending, staking, liquidity provisioning, and governance.
• 3+ years working on network security, cryptographic principles, and consensus mechanisms.
• Proven ability to scale blockchain networks and optimize transaction throughput.
• 3+ years of hands-on experience with Golang, WASM optimizations, and validator infrastructure.
• Contributions to open-source Cosmos SDK, Tendermint, or CosmWasm projects.
• Founder-style ownership mindset—you don’t wait for permission to solve problems.

📈 Bonus Points

• Experience with AI-powered smart contract security analysis and automation.
• Deep knowledge of MEV, front-running protection, and on-chain data indexing.

Why Join Elys?

• 🚀 Work on the cutting edge of DeFi—structured, yet always evolving.
• 🌎 Remote-first, flexible hours, global team of builders.
• 💰 Starting salary: $90K – $150K, open to discussion. Option for tokens as part of salary—let’s talk.
• 📈 Long-term career growth in Web3 & DeFi.
• ⚡ Balanced workflow—steady rhythm when possible, deep problem-solving when needed.

Ready to Build?

• 📌 Apply Now – Send your resume, GitHub, and portfolio to:
• 📧 Email: email
• 💬 Telegram: t.me/jstamp
• 🐦 X (Twitter): x.com/mitchell_mmxxi

Join Elys Network and help redefine DeFi trading, universal liquidity, and blockchain scalability on Cosmos! 🚀