Senior/Lead Smart Contract Engineer

Senior/Lead Smart Contract Engineer (Solidity/EVM) - DeFi Innovation Work Model: Hybrid - 3 days on-site (Monday, Tuesday, Thursday) About Our Client Our client is a well‑funded Swiss technology innovation company at the forefront of decentralized finance. Founded in 2019 and based in the Lausanne region, they’re behind a groundbreaking decentralized exchange (DEX) that addresses one of DeFi’s most persistent challenges: impermanent loss. The Role We’re seeking an exceptional Senior/Lead Smart Contract Engineer with deep Solidity and EVM expertise to join a growing engineering team. This role offers a unique opportunity to shape the future of decentralized finance while building a collaborative engineering culture centered on knowledge‑sharing and innovation. You’ll work on cutting‑edge DeFi protocols, architect and implement sophisticated smart contracts across a multi‑chain EVM ecosystem, and contribute to products that generate millions in TVL and serve thousands of daily users. What You'll Do Design, develop, and deploy advanced Solidity smart contracts for DeFi protocols Architect scalable, secure, and gas‑efficient solutions across multiple EVM‑compatible blockchain networks Deep‑dive into EVM internals to optimize contract execution and gas consumption Collaborate with a high‑caliber engineering team to solve complex technical challenges in DeFi Conduct thorough code reviews and security audits to ensure protocol integrity Optimize smart contract performance and implement best practices for security Contribute to protocol design decisions and technical architecture discussions Mentor junior engineers and foster a culture of knowledge‑sharing and continuous improvement Stay ahead of emerging trends in blockchain technology and DeFi innovations What We're Looking For Required: Master's or PhD in Computer Science, Engineering, Mathematics, or related field (or equivalent exceptional experience) 3+ years of professional experience developing Solidity smart contracts for production environments EVM specialist with deep understanding of Ethereum Virtual Machine internals, opcodes, and execution flow Expert knowledge of Ethereum and EVM‑compatible blockchains (BSC, Polygon, Arbitrum, Base, etc.) Strong knowledge of smart contract security best practices and common vulnerabilities Experience with DeFi primitives: liquidity pools, automated market makers, yield optimization, tokenomics Proficiency with development tools: Hardhat, Foundry, Truffle, Web3.js/Ethers.js Deep understanding of gas optimization techniques and efficient contract design patterns Experience with blockchain auditing processes and security frameworks Understanding of EVM opcodes, bytecode analysis, and low‑level contract optimization Highly Valued: French language skills (not essential but beneficial for team integration) Experience with cross‑chain protocols and bridge mechanisms Contributions to open‑source blockchain projects or EVM tooling Previous experience working in Swiss or European tech ecosystems Published research or papers in blockchain/cryptography/EVM optimization Experience with formal verification and advanced testing methodologies Knowledge of EVM equivalence vs. EVM compatibility trade‑offs Experience with Layer 2 solutions and rollup technologies Ready to Shape the Future of DeFi? If you’re passionate about blockchain technology, excited by complex technical challenges at the EVM level, and want to work with a team that’s genuinely pushing the boundaries of what’s possible in DeFi, we’d love to hear from you. For more information about this confidential opportunity, please contact Austin Werner. Seniority level Director Employment type Full‑time Job function Engineering Services and Financial Services #J-18808-Ljbffr