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Senior Smart Contract Engineer (Web3) | San Francisco, CA

Nexus DeFi Labs
San Francisco
Estimated Salary
USD 180.000 – USD 260.000
New
Live Update
29 Juni 2026
Deadline
29 Jun 2027

Job Description

We are a fast-growing Web3 protocol seeking a Senior Smart Contract Engineer to architect the next generation of decentralized finance (DeFi) infrastructure. If you are passionate about blockchain security, scalable architecture, and building products that empower the global economy, we want to meet you.

As a key member of our technical team, you will be responsible for designing, deploying, and auditing complex smart contracts on the Ethereum Virtual Machine (EVM). You will work in a collaborative environment with world-class engineers and researchers to push the boundaries of what is possible in the crypto space.

Why Join Us?

  • Work with cutting-edge technology in the Web3 ecosystem.
  • Competitive compensation and equity package.
  • Flexible remote-first policy with a hub in San Francisco.
  • Opportunity to shape the future of decentralized applications.

Responsibilities

  • Design, develop, and audit secure, scalable smart contracts using Solidity and Rust.
  • Implement complex DeFi protocols including liquidity pools, automated market makers (AMMs), and lending markets.
  • Optimize smart contract gas consumption and transaction throughput for high-volume environments.
  • Collaborate closely with frontend developers and product managers to integrate on-chain logic with user interfaces.
  • Conduct rigorous security reviews and penetration testing to identify and mitigate vulnerabilities.
  • Contribute to open-source tooling and documentation within the Web3 community.
  • Mentor junior developers and conduct code reviews to maintain high engineering standards.

Qualifications

  • 5+ years of professional experience in software development, with at least 3 years specifically in blockchain/Web3 smart contract development.
  • Deep expertise in Solidity and Rust, with hands-on experience deploying to mainnet.
  • Strong understanding of Ethereum Virtual Machine (EVM), gas optimization techniques, and cryptographic principles.
  • Experience with development frameworks such as Hardhat, Foundry, or Truffle.
  • Familiarity with security best practices, including OWASP standards and formal verification methods.
  • Excellent problem-solving skills and ability to work in a fast-paced, agile environment.
  • Strong communication skills and a proactive approach to technical challenges.

Required Skills

Solidity Rust Web3.js Ethereum Smart Contracts Security Audits DeFi Gas Optimization Truffle Hardhat Foundry

Ready to Take This Challenge?

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