Fun
Protocol Engineer
New York, NY · Hybrid · Full-time · Posted Sep 22, 2025
About the job
Designs and implements secure smart contracts and blockchain integrations for Web3 payments infrastructure across multiple chains.
What you'll do
- Design, develop, and deploy smart contracts and protocol implementations across blockchain platforms.
- Collaborate with backend and product teams to architect blockchain solutions; write and test code and participate in security audits.
- Research blockchain technologies and DeFi protocols, and help respond to incidents and debug on-chain issues.
What they ask for
- Strong experience building and deploying production smart contracts on major blockchain platforms.
- Deep understanding of blockchain architecture, consensus mechanisms, and cryptographic principles.
- Hands-on experience with smart contract languages such as Solidity, Rust, or Move.
- Knowledge of DeFi protocols, token standards, cross-chain communication patterns, and common smart contract vulnerabilities.
Nice to have
- Production experience with multiple blockchain ecosystems, or work at a crypto startup or Web3 infrastructure company.
- Experience with bridges, oracles, interoperability protocols, high-volume DeFi or DEX infrastructure, open-source contributions, formal verification, or advanced testing frameworks.
Tools
Solidity, Rust, Move, Ethereum, Solana, L2s
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