Protocol Engineer

Summary

Join the Uniswap Foundation as a Protocol Engineer and contribute to the development of smart contracts for in-house projects, the Uniswap Protocol, Unichain, and grantee collaborations. You will play a key role in designing, implementing, and optimizing smart contract systems, participating in technical design discussions, and providing design feedback. Responsibilities include designing, implementing, and optimizing Solidity-based smart contracts, providing technical guidance to external developers, exploring new DeFi primitives, participating in code reviews, and implementing testing and optimization strategies. The ideal candidate possesses strong DeFi and smart contract architecture understanding, significant Solidity experience, proficiency with Foundry, and experience with testing methodologies. Additional beneficial skills include Yul and low-level opcode experience, gas optimization techniques, and invariant testing.

Requirements

• Strong understanding of DeFi patterns and smart contract architecture
• At least two years of experience writing complex Solidity smart contracts with an emphasis on readability, maintainability, and security
• Proficiency with Foundry, including cheatcodes, foundry.toml, and script execution
• Experience with unit testing and fuzz testing for smart contract security
• Confidence using Git and managing version control in a collaborative engineering environment
• Ability to design clean abstractions and reusable smart contract components
• Familiarity with Uniswap v4 contracts and related DeFi protocols

Responsibilities

• Design, implement, and optimize Solidity-based smart contracts for Uniswap-related projects, with a focus on security, efficiency, and maintainability
• Provide technical guidance and design feedback for external developers building on Uniswap and Unichain, including hook developers and DeFi projects
• Explore and prototype new DeFi primitives, trading mechanisms, and smart contract architectures to expand Uniswap’s capabilities
• Participate in design sessions and code reviews, ensuring high standards in code quality, security, and organization
• Implement unit tests, fuzz testing, and gas optimizations to ensure smart contract reliability and performance
• Work on Hooks and reference implementations for Uniswap v4
• Work on Experimental swapping UX designs
• Work on Indexers and graph traversal algorithms
• Work on Composable DeFi legos
• Work on SDK abstractions and developer tooling
• Work on Periphery integrations such as liquidity management tools and swap-and-add functionalities

Preferred Qualifications

• Experience with Yul and low-level opcodes for gas-efficient smart contract development
• Knowledge of gas optimization techniques
• Experience with invariant testing for smart contract correctness
• Public speaking experience for developer outreach and technical presentations
• Familiarity with TypeScript for SDK and front-end integrations