Crypto Wallet Security Engineer (MPC & Wallet Architecture)

Medium; Singapore; On-site; SGD 12,564 - 25,128; Full time

Job summary

Coins is seeking a security-focused professional to guard our wallets across cold, warm, and hot storage. You will lead the security architecture, implement MPC and multi‑signature controls, and ensure robust on‑chain operation for BTC, ETH, and Tron.

You’ll audit smart contract interactions and drive risk mitigation from day one. The role requires 1–3 years in Web3 security, strong cryptography knowledge, and practical experience with private key management in large platforms.

Qualifications

• Bachelor’s degree or above in a relevant field with 1–3 years of Web3 or blockchain security experience.
• Familiar with basic cryptography, key management, and encrypted storage; know FIPS 140‑2/3.
• In‑depth knowledge of MPC, TSS, and on‑chain multi‑signature mechanisms; disaster recovery drills.
• Familiar with BTC, ETH, TRON public chains; capable in RPC interface security hardening.
• Know common smart contract security vulnerabilities; able to conduct audits and risk assessments.
• Strong security risk awareness and experience with wallet security in large platforms preferred.

Responsibilities

• Lead security architecture for cold, warm, and hot wallets; standardize private key lifecycle and ensure compliance with top security standards.
• Manage MPC wallet security policy configuration, permissions, and disasters drills to prevent single points of failure and abuse.
• Harden on‑chain security for full nodes and RPC interfaces across major chains; defend against hijacking and Sybil attacks.
• Audit security of interactions with external smart contracts (USDT/USDC/DEXs) and mitigate on‑chain vulnerabilities like reentrancy and phishing.

Skills

Web3 security

Wallet security

MPC & multi-signature

Node security

Smart contract auditing

Cryptography basics

Education

Bachelor’s degree in Computer Science, Cybersecurity, Cryptography, Software Engineering, Blockchain or related majors

Job description

Coins is seeking a security-focused professional to guard our wallets across cold, warm, and hot storage. You will lead the security architecture, implement MPC and multi‑signature controls, and ensure robust on‑chain operation for BTC, ETH, and Tron.

You’ll audit smart contract interactions and drive risk mitigation from day one. The role requires 1–3 years in Web3 security, strong cryptography knowledge, and practical experience with private key management in large platforms.