Symbiotic
Senior/Staff Smart Contract Engineer
1w ago
EuropeLeadRemotesolidityblockchainethereumsmart contracts
Senior/Staff role to develop on-chain collateral markets and financial infrastructure using smart contracts.
Responsibilities
- 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
- 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
Other
- Symbiotic is the infrastructure beneath collateral markets, where capital can secure financial obligations, remain productive, and be enforced by code.
- 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. As institutional capital increasingly moves onchain, Symbiotic is positioned to become the coordination layer connecting capital and risk across the onchain economy.
- 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.
- See how Symbiotic is powering the next generation of onchain finance: symbiotic.fi
- 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.
- We’re looking for talented professionals to join us at a defining moment, as Symbiotic helps shape the next generation of onchain finance.
- 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.