Wallet Security Engineer - Custody Security Lead

We’re looking for a Wallet Security Engineer to lead the charge in designing, implementing, and continuously improving wallet infrastructure security — safeguarding digital assets for both the company and our customers. You’ll play a key role in defending against external threats, insider risk, and operational failure across both custodial and non-custodial systems.
 
This is a mission-critical role for someone who thrives at the intersection of security, cryptography, and blockchain infrastructure.
 
What You'll Be Doing:
 
1. Wallet Infrastructure & Security Design

• Design, secure, and maintain both hot and cold wallet infrastructures
• Implement and manage multisig, TSS (threshold signature schemes), and HSMs
• Monitor on-chain activity and wallet transactions for suspicious patterns

2. Custody Systems Engineering

• Collaborate with engineering to architect secure custodial and non-custodial systems
• Enforce RBAC, secure key management, and provisioning protocols
• Build out robust backup, recovery, and failover processes

3. Threat Modeling & Risk Management

• Identify and mitigate wallet-related vulnerabilities
• Participate in internal red teaming, code audits, and pen tests
• Maintain updated threat models and internal security policies

4. Incident Response

• Lead response efforts for wallet-related incidents or breaches
• Conduct postmortems, root cause analyses, and implement prevention strategies
• Develop incident playbooks to reduce response time and impact

5. Compliance & Security Audits

• Ensure wallet security systems meet relevant regulatory frameworks
• Support and prepare for third-party audits and penetration assessments

6. Monitoring & Automation

• Deploy monitoring tools to track and detect wallet anomalies in real time
• Automate key rotation, access reviews, and security event alerts

What You Bring

• 3–7 years in cybersecurity, preferably within crypto or fintech
• Deep understanding of cryptographic systems (ECDSA, Schnorr, Shamir's Secret Sharing, etc.)
• Hands-on experience with HSMs, TSS, MPC, and advanced key management systems
• Familiarity with leading blockchain platforms (Ethereum, Bitcoin, Solana)
• Awareness of smart contract vulnerabilities (especially for DeFi/DEX)
• Solid understanding of cloud security, containers, and CI/CD pipelines
• Proficiency in Go, Rust, Python, or Solidity is a strong plus
• Security certifications (CISSP, OSCP, CEH, etc.) are a bonus but not required

Who You’ll Work With

• Infrastructure, DevOps, and Blockchain Engineering teams
• Legal, compliance, and risk teams
• External audit firms, wallet vendors, and security researchers

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