Smart Contract Engineer (web3)
CoW Protocol
About CoW Protocol
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
We’re on the lookout for a Smart Contract Engineer to join our team. If you’re passionate about blockchain tech, love solving complex problems, and thrive on ownership, we’d love to hear from you. We’ve got a packed roadmap full of exciting projects, and we’re all about building innovative, solid, and high-performance solutions as we grow
What you will do
Build new features: work on new CoW Protocol features by developing new smart contracts and laying out support for them in our off-chain infrastructure
Review protocol integrations: advise third parties on how to work with CoW Protocol, write grant proposals and support grantees in their execution
Foster decentralization: contribute to designing the next version of CoW Protocol, in the spirit of removing central authorities and building trust through verifiable execution
Contribute to the upkeep of the protocol: investigate suspicious transactions, detect on-chain misbehavior, support CoW DAO governance by participating in the discussion through its formal proposal process (CIPs)
Maintainable code: collaborative coding through code review, internal feature discussion, full testing coverage, CI, public development process on GitHub
Collaborating with a remote team, sharing feedback, and debugging
Tech stack you'll be in contact with
Smart contracts: Solidity, Foundry, rarely Hardhat
Back-end contract services: Rust, Kubernetes
Debugging and alerting: Tenderly, Grafana, Elasticsearch
Data analysis: Python, Dune Analytics
Governance: Safe Multisig, Snapshot
Communication: GitHub, Slack, Notion, Zoom, Google Docs
Supported chains: Ethreum, Arbitrum, Gnosis Chain, Base
Who you are
Has solid Solidity expertise – with experience working on EVM-compatible chains
Is skilled in Rust or Python – Rust is preferred, but Python works too as long as you’re open to learning Rust
Delivers results – you have a proven history of writing high-quality, functional, and reliable code
Works well remotely – async communication, detailed code reviews, and team collaboration are second nature to you
Excels at problem-solving – you can tackle challenges with creativity and efficiency
Takes ownership – you’re proactive and see things through to the end
A bonus
Familiarity with the DeFi ecosystem
Experience contributing to or managing open-source project
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.
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!