Senior Smart Contract Engineer

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Senior Smart Contract Engineer

Full-time/Company: 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.

About the role

We are hiring a Smart Contract Engineer to help shape the next iterations of CoW Protocol and extend its real-world use cases.​

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 United States, Australia, or New Zealand

Tech you’ll work with

• Smart contracts: Solidity, Foundry (and occasionally Hardhat).
• Backend and services: Rust and Kubernetes, where contracts connect to off-chain components.​
• Monitoring and debugging: Tenderly, Grafana, and Elasticsearch for tracing and alerting.
• Data and analysis: Python, Dune Analytics.
• Governance tools: Safe multisig, Snapshot.
• Supported chains: Ethereum, Gnosis Chain, Arbitrum, Base, and potentially others as the roadmap expands.​

Who you are:

• You have solid Solidity experience and a track record on EVM-compatible chains, ideally visible through meaningful GitHub activity and collaboration with others.​
• You are strong in Rust or Python; Rust is preferred, but deep Python skills plus a real willingness to learn Rust also work.
• You are a problem solver who likes to dig into issues, reason about trade-offs, and architect “masterpiece” level solutions rather than quick hacks.​
• You are comfortable working in a highly async, remote setup, with thoughtful written communication and detailed code reviews.
• You take ownership, follow through, and are curious about extending and reiterating on the protocol rather than just implementing tickets.​

Nice to have:

Familiarity with the DeFi ecosystem and major protocols.

Experience contributing to or maintaining open source projects.

What we can offer:

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

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