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Senior Web3 Back-end Engineer

mLabs

$150,000 - $250,000
Dec 5, 2025
Remote, US
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Building the foundational yield engine for the crypto economy by creating a unified layer that intelligently and continuously reallocates capital across Decentralized Finance (DeFi) protocols to maximize returns.

Requirements

  • 3+ years of demonstrable experience building and releasing production-grade Web3 backend systems.
  • Strong track record of integrating with various protocols and smart contracts, including managing complex transaction flows and seamless RPC node interaction.
  • Deep understanding of EVM (Ethereum Virtual Machine) fundamentals, smart contract best practices, and current industry patterns in DeFi.
  • Extensive experience with popular Web3 development and testing tools/libraries (e.g., Tenderly, ethers, viem, wagmi, or similar).

Responsibilities

  • Architect and build a comprehensive multichain yield platform*, a key piece of DeFi infrastructure.
  • Design and implement robust backend systems to interface directly with various on-chain protocols and smart contracts across multiple networks.
  • Own and optimize intricate transaction flows, including secure interaction with RPC nodes, managing state, and ensuring reliable, idempotent on-chain execution.
  • Play a key role in defining and implementing the next generation of on-chain yield strategies and products.
  • Maintain the highest standards for security, quality, and robustness for all production-grade Web3 systems.

Other

  • Strong bias towards action and the ability to work autonomously, thriving in high-ambiguity environments.
  • Possess the perseverance to figure out the solution to any complex, previously unsolved technical challenge.
  • Prior experience deploying smart contracts to mainnet and various EVM-compatible chains.
  • Remote-first culture with flexibility built into the core.
  • Must have 5hrs overlap with EST