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Senior Smart Contract Engineer (Web3)

Apex Protocol Labs
New York
Estimated Salary
USD 180.000 – USD 250.000
New
Live Update
1 Juli 2026
Deadline
1 Jul 2027

Job Description

The Opportunity: Join Apex Protocol Labs, a trailblazing force in the decentralized finance (DeFi) ecosystem. We are seeking a visionary Senior Smart Contract Engineer to architect the next generation of high-speed, secure blockchain infrastructure. If you are passionate about cryptography, scalable systems, and building the future of money, this is your stage.


Why Join Us?

  • Work with state-of-the-art technologies in a fully remote-first environment.
  • Competitive compensation package including equity options.
  • Contribute to protocols with billions in Total Value Locked (TVL).

We are looking for a technical expert who can bridge the gap between theoretical cryptography and production-grade code.

Responsibilities

  • Design, develop, and audit high-security smart contracts primarily in Solidity, with opportunities to contribute to Rust or Move-based chains.
  • Optimize gas consumption and improve transaction throughput for Layer 2 solutions.
  • Lead code reviews and implement rigorous testing strategies (unit, integration, and fuzz testing).
  • Collaborate with the frontend team to integrate Web3 libraries (ethers.js, web3.js) into user-friendly interfaces.
  • Identify and mitigate potential security vulnerabilities in smart contract code.
  • Contribute to the technical roadmap for upcoming protocol upgrades and feature releases.

Qualifications

  • 5+ years of professional software engineering experience, with at least 2 years specifically in blockchain development.
  • Deep expertise in Solidity and the Ethereum Virtual Machine (EVM).
  • Experience with Rust or Go is highly preferred.
  • Strong understanding of cryptographic principles, hash functions, and zero-knowledge proofs.
  • Proven track record of deploying and maintaining production-grade smart contracts on Ethereum or similar networks.
  • Excellent problem-solving skills and ability to thrive in a fast-paced, agile environment.

Required Skills

Solidity Rust Ethereum Web3.js Truffle Hardhat Security Audits Smart Contract Architecture DeFi Blockchain Go Cryptography

Ready to Take This Challenge?

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