Senior/Staff Smart Contract Engineer

Symbiotic

Senior/Staff Smart Contract Engineer at Symbiotic developing on-chain collateral markets for traditional and crypto-native finance. Working across smart contract codebase and building new modules.

Posted 7/1/2026full-timeRemote • 🇬🇧 United KingdomSeniorWebsite

Tech Stack

Tools & technologies

GoJavaScriptPythonRustSolidityTypeScript

About the role

Key responsibilities & impact

Design, write, optimize, and audit smart contracts in Solidity, with a focus on performance, clarity, and security
Build DeFi primitives from scratch — vaults, lending mechanics, staking, and related protocol-level components
Develop adapters, connectors, and plugins for our Liquid Lane product across varying levels of complexity
Contribute to the design and buildout of greenfield financial products.
Conduct and support security audits, addressing vulnerabilities and hardening contracts against common attack vectors
Where needed, build beyond the contract layer, leveraging AI as a multiplier: simple frontends, indexers, internal tooling, to move a piece of work end to end

Requirements

What you’ll need

Expert in Solidity, with deep knowledge of EVM internals: execution flow, memory/storage models, gas mechanics, and precompiles
Strong grasp of DeFi protocols and primitives — how lending protocols, DEXes, stablecoins, work, where they break, and the common pitfalls of building them
Strong security mindset: familiar with common attack vectors, contract optimization, and the audit process
Comfortable working across the stack when a task calls for it — you become a fullstack developer if the job requires it
Solid computer science fundamentals — algorithms, low-level reasoning about how code executes
Nice to Have: Deep specialist knowledge in one protocol domain, even if exposure to others is lighter — we value genuine depth/expertise
Experience in compiler development
Experience in Rust, Go, C/C++
Practical coding experience in Python and JavaScript/TypeScript
Exposure to Yul, Vyper, or Huff

Benefits

Comp & perks

Flexible working hours
Professional development opportunities

ATS Keywords

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Hard Skills & Tools

Smart Contract DevelopmentEVM InternalsContract OptimizationAlgorithmsPython ProgrammingJavaScript ProgrammingTypeScript ProgrammingRust ProgrammingGo ProgrammingYul Exposure