Senior/Staff Smart Contract Engineer

About the role

strong>About Symbiotic br> br> /strong>Symbiotic is the infrastructure beneath collateral markets, where capital can secure financial obligations, remain productive, and be enforced by code. br> br>By changing the economics of onchain collateral, Symbiotic enables new categories of neofinance applications that were previously impossible to build - including credit, insurance, RWA liquidity, and more. br> br>As institutional capital increasingly moves onchain, Symbiotic is positioned to become the coordination layer connecting capital and risk across the onchain economy. br> br>Backed by Paradigm, Pantera, Cyber.fund, and Coinbase Ventures, we power 80+ vaults, 74,000+ active stakers, and 111 operators - with Chainlink, Nexus Mutual, and Cap Labs among the teams live in production. br> br>See how Symbiotic is powering the next generation of onchain finance: symbiotic.fi br> br> strong> strong>Our People br> br> /strong> /strong>We re a tight-knit team of experienced builders working at the forefront of financial infrastructure. Our backgrounds span high-growth tech start-ups, leading crypto companies, major banks, insurers, and financial institutions. We work with ownership, a high bar for craft, and the urgency of an early-stage company - in an environment where people are trusted to take initiative and supported to do their best work. br> br>We re looking for talented professionals to join us at a defining moment, as Symbiotic helps shape the next generation of onchain finance. br> br> strong>About The Role br> br> /strong>We re building on-chain collateral markets for both traditional and crypto-native finance. We re scaling our core protocol and the products built on top of it, and you ll work across our existing smart contract codebase - core contracts, core extensions, and middleware SDK - while building new modules from the ground up. Your work will span extending mature, in-production systems and architecting greenfield financial products designed and built from scratch on our stack. br> br> strong> strong>What You ll Do br> br> /strong> /strong> ul> li>Design, write, optimize, and audit smart contracts in Solidity, with a focus on performance, clarity, and security /li> li>Build DeFi primitives from scratch - vaults, lending mechanics, staking, and related protocol-level components /li> li>Develop adapters, connectors, and plugins for our Liquid Lane product across varying levels of complexity /li> li>Contribute to the design and buildout of greenfield financial products. /li> li>Conduct and support security audits, addressing vulnerabilities and hardening contracts against common attack vectors /li> li>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 br> br> /li> /ul> strong> strong>Who You Are br> br> /strong> /strong> ul> li>Expert in Solidity, with deep knowledge of EVM internals: execution flow, memory/storage models, gas mechanics, and precompiles /li> li>Strong grasp of DeFi protocols and primitives - how lending protocols, DEXes, stablecoins, work, where they break, and the common pitfalls of building them /li> li>Strong security mindset: familiar with common attack vectors, contract optimization, and the audit process /li> li>Comfortable working across the stack when a task calls for it - you become a fullstack developer if the job requires it /li> li>Solid computer science fundamentals - algorithms, low-level reasoning about how code executes br> br> /li> /ul> strong> strong>Nice to Have br> br> /strong> /strong> ul> li>Deep specialist knowledge in one protocol domain, even if exposure to others is lighter - we value genuine depth/expertise /li> li>Experience in compiler development /li> li>Experience in Rust, Go, C/C++ /li> li>Practical coding experience in Python and JavaScript/TypeScript /li> li>Exposure to Yul, Vyper, or Huff br> br> /li> /ul>

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