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Smart Contract Engineer at MLabs. Smart Contract Engineer (EVM + Rust). Location: . European timezones. Compensation: . highly competitive rates; salary bands are flexible and scale directly with your seniority and depth of DeFi expertise.. We are looking for a highly skilled . Smart Contract Engineer. with deep expertise in both . Solidity (EVM). and . Rust. to join our elite engineering team at MLabs. In this role, you will be subcontracted to work directly with one of our premier clients—leading innovators in the DeFi space—building next-generation financial infrastructure on . Base, Arbitrum. , and other EVM-compatible networks.. As a bridge between the smart contract layer and high-performance systems, you will architect, develop, and secure complex DeFi protocols. You aren’t just writing code; you are building the "money legos" of the future, ensuring they are gas-efficient, battle-tested, and capable of handling significant TVL (Total Value Locked).. Key Responsibilities. Architect & Develop:. Design and implement robust, production-grade smart contracts in Solidity for deployment on L2s like Base and Arbitrum.. Systems Engineering:. Build high-performance backend services, tooling, or blockchain components using Rust to support on-chain logic.. DeFi Logic:. Develop complex on-chain financial logic including AMMs, lending/borrowing mechanics, staking protocols, or yield-generating products.. Optimization:. Perform deep-dive gas optimizations and performance tuning for both smart contracts and Rust-based infrastructure.. Security & Risk:. Apply rigorous security best practices to protect against common DeFi attack vectors (reentrancy, oracle manipulation, etc.) and participate in internal code reviews.. Solidity Expertise:. Proven experience writing, testing (Foundry/Hardhat), and deploying smart contracts in a production environment.. EVM Mastery:. A deep understanding of the Ethereum Virtual Machine, including gas optimization, memory layout, and L2-specific nuances.. Rust Proficiency:. Professional experience building backend services or blockchain-related tooling in Rust, with a comfort level working across the full systems stack.. L2 Experience:. Hands-on experience deploying and managing protocols on Arbitrum, Base, or similar Rollup solutions.. Domain Experience. DeFi Background:. Previous experience working on Decentralized Finance protocols (e.g., DEXs, Lending, Restaking, or Tokenomics-heavy systems).. Architecture Tradeoffs:. A strong grasp of on-chain vs. off-chain architecture and the security considerations specific to financial protocols.. Upgradeability:. Familiarity with common proxy patterns and upgradeable contract design is a major plus.. Company Location: Germany.