Security Engineer (Web3)

TL;DR

Security Engineer (Web3): Maintain and improve custody systems for validator keys, operational keys, and on-chain operations with an accent on key generation, storage, access controls, and recovery procedures. Focus on hardening signing paths, building anti-scam tooling, conducting code reviews, and participating in incident response for blockchain infrastructure.

USA (Remote)

$140K – $190K

Company

hirify.global creates foundational infrastructure to accelerate adoption of decentralized protocols based on blockchain technologies like Sui.

What you will do

• Maintain and improve custody systems for validator keys, operational keys, and on-chain objects, including key generation, storage, access controls, signing, rotation, and recovery.
• Harden end-to-end signing paths by reviewing and improving code, infrastructure, and operational practices for transaction authorization and submission.
• Build anti-scam and anti-abuse tooling to detect phishing, malicious dApps, drainer contracts, and partner with wallet teams on mitigations.
• Conduct code and design reviews for components handling sensitive keys or on-chain assets, focusing on cryptography, access control, and safety.
• Investigate and respond to security incidents related to custody or ecosystem abuse, driving fixes to prevent recurrence.

Requirements

• 3+ years of hands-on experience in security engineering, application security, or product security.
• Knowledge of key management in production, such as HSMs, cloud KMS, MPC, threshold signatures, hardware wallets, or similar.
• Proficiency in Rust, TypeScript, Python, or Move, with experience reviewing and writing security-sensitive code.
• Solid understanding of applied cryptography fundamentals and common misuses.
• Builder mentality: operate with ambiguity, dive into unfamiliar codebases, and ship fixes.
• Strong written and verbal communication to explain issues to engineers and stakeholders.

Nice to have

• Interest in web3; prior experience in crypto, fintech, or regulated environments.

Culture & Benefits

• Comprehensive health insurance including medical, dental, vision for you and dependents; HSAs and FSAs.
• 18 weeks paid parental leave.
• Wellbeing programs: family planning, mental health support, EAP, fitness/nutrition apps.
• Short/long-term disability, life, accident insurance, traveler insurance.
• 401(k), wellness stipend, flexible PTO, 11 paid holidays.
• Team offsites, annual retreat, complimentary privacy protection.