Senior/Staff Smart Contract Engineer

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🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

📜 Smart Contract Engineer

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Symbiotic

WebsiteLinkedInAll Job Openings

11 - 50 employees

₿ Crypto

💳 Fintech

🌐 Web 3

Crypto • Fintech • Web 3

Symbiotic is the universal staking framework enabling decentralized networks to bootstrap powerful, fully sovereign ecosystems. Projects use the Symbiotic protocol to source operators and to scale economic security for their decentralized network.

📋 Description

• 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

🏖️ Benefits

• Flexible working hours • Professional development opportunities