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Wallet Security Engineer - Custody...

Crypto RecruitSingapore

15 days ago

Job description

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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Security Engineer • Singapore