Security Protocol Engineer securing protocol-layer components for a Bitcoin ecosystem startup. Leading threat modeling and code reviews with an emphasis on security and software experience.
Responsibilities
Own security across protocol-layer components (L2, bridge, custody)
Act as the final gatekeeper before code hits main
Lead threat modeling, design reviews, and mitigation planning
Write critical patches and drive hardening when bandwidth is limited
Maintain security CI tooling: sig-verification, SAST, fuzzing, secrets scanning
Review 100% of protocol-relevant PRs and enforce automated checks
Run secure coding workshops and pair-program during critical sprints
Interface with auditors and bounty researchers to scope, triage, and fix issues
Authority to block merges or deploys on security grounds
Direct commit access for emergency fixes
Requirements
5+ years in security engineering with hands-on software experience
Strong background in Rust, Go, or Solidity
Deep knowledge of threat modeling and real-world exploit paths
Experience owning or maintaining CI-based security automation
Comfortable leading security without direct org ownership
Bonus: protocol-level blockchain experience, audits, bounties, or custody systems
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