Senior Protocol Engineer (Web3)

TL;DR

Senior Protocol Engineer (Web3): Designing, building, and maintaining production-grade smart contracts for secure, long-lived systems used in high-value production environments with an accent on contract architecture, upgradeability, and lifecycle management. Focus on identifying and mitigating on-chain security risks, preparing contracts for external audits, and managing deployments.

Location: Fully remote role based in Europe (GMT–GMT+2)

Salary: $122,000

Company

Applied research and engineering lab operating at the intersection of cryptography, blockchain, and emerging technologies.

What you will do

• Design, build, and maintain production-grade smart contracts.
• Own contract architecture, upgradeability, and lifecycle management.
• Identify and mitigate on-chain security risks.
• Prepare contracts for external audits and implement remediations.
• Develop robust test suites.
• Manage deployments, upgrades, and live monitoring.

Requirements

• Strong Solidity experience shipping production contracts.
• Deep knowledge of EVM internals and common vulnerabilities.
• Hands-on experience with proxies, upgrades, and audit prep.
• Familiarity with key ERC standards (ERC-20, ERC-721, ERC-4337, ERC-1271).
• Experience maintaining high-value mainnet deployments.
• Excellent testing, debugging, and communication skills.

Nice to have

• ERC-4337 / account abstraction experience.
• Exposure to post-quantum cryptography.
• Experience with AA tooling (e.g. ZeroDev, Biconomy, Alchemy).
• Token launch or vesting contract experience.
• Open-source or Ethereum standards contributions.