Smart Contract Engineer (Web3)

TL;DR

Smart Contract Engineer (Web3): Designing, building, and iterating on the CoW Protocol to extend its real-world use cases with an accent on decentralization, verifiable execution, and on-chain order settlement. Focus on DeFi integrations, detecting on-chain misbehavior, and contributing to hirify.global governance.

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

Salary: Earn 5.000 USDC or USD with the refer-to-earn program.

Company

hirify.global is on a mission to protect Ethereum users from MEV and optimize trade execution across DeFi.

What you will do

• Build new protocol features by designing and implementing smart contracts and ensuring they integrate cleanly with our off-chain infrastructure.
• Work on sophisticated DeFi integrations such as flash loan-based flows with top protocols, as well as collaborations with leading wallets and lending markets.
• Help reshape the next iteration of CoW Protocol, focusing on decentralization, verifiable execution, and pragmatic on-chain order settlement.
• Support the health of the protocol by investigating suspicious transactions, detecting on-chain misbehavior, and contributing to hirify.global governance discussions and proposals.
• Review and advise on integrations from external teams, including grant proposals and support for grantees building on top of CoW Protocol.
• Collaborate in a remote-first environment through code reviews, async discussions, and a public GitHub-driven development process with strong testing and CI.

Requirements

• 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.

Culture & Benefits

• Flexible work environment: Join our hub in Lisbon or work remotely
• Token plan: Have a stake in our mission and shape the future of hirify.global
• 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
• Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance