Wallet & Crypto Security Engineer

Coins.ph; 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

Join the Pioneer Crypto Brand in the Philippines!

Coins is the most established crypto brand in The Philippines and has gained the trust of more than 18 million users. Through the easy-to-use mobile app, users can buy and sell a variety of different cryptocurrencies and access a wide range of financial services.

Coins is fully regulated by the Bangko Sentral ng Pilipinas (BSP) and is the first ever crypto-based company in Asia to hold both Virtual Currency and Electronic Money Issuer licenses from a central bank.

Responsibilities

• Wallet Architecture Security Construction: Lead and maintain the security architecture of the company’s cold, warm and hot cryptocurrency wallets. Standardize the full lifecycle of private key generation, storage, usage, backup and destruction, and ensure the entire system complies with top‑tier industry security standards including FIPS 140‑2/3.
• MPC & Multi‑Signature Strategy Management: Manage security policy configuration, permission grading and isolation for MPC (Multi‑Party Computation) wallets and multi‑sig smart contracts. Conduct regular disaster recovery drills to eliminate single points of failure, permission abuse and internal malicious risks.
• On‑Chain Transaction & Node Security: Conduct security hardening and daily operation and maintenance for full nodes and RPC interfaces of mainstream public chains including BTC, ETH and Tron, defending against node hijacking, Sybil attacks, unauthorized access and other underlying security threats.
• Smart Contract Interaction Review: Audit the security of business system interactions with external smart contracts such as USDT, USDC and DEXs. Identify and prevent common on‑chain vulnerabilities including approval phishing and reentrancy attacks to avoid asset security risks.

Requirements

• Bachelor’s degree or above in Computer Science, Cybersecurity, Cryptography, Software Engineering, Blockchain or related majors, with 1‑3 years of working experience in Web3 or blockchain security.
• Familiar with basic cryptography principles, proficient in core logic of public and private key management and encrypted storage, familiar with FIPS 140‑2/3 standards and cold/hot wallet architecture.
• In‑depth knowledge of MPC, TSS threshold signature and on‑chain multi‑signature mechanisms, with hands‑on experience in permission control, disaster recovery drills and risk investigation.
• Familiar with the underlying logic of mainstream public chains (BTC, ETH, TRON), with practical capabilities in public chain node operation, RPC interface security hardening and on‑chain attack prevention.
• Familiar with common smart contract security vulnerabilities, able to independently complete contract interaction security audits, risk assessment and problem rectification.
• Strong security risk awareness and sense of responsibility, rigorous and meticulous working attitude, with in‑depth understanding of digital asset and private key security. Experience in wallet security at large platforms is preferred.

Join the Coins Team Now!

Meaningful Collaborations – The successful candidate will work cross‑functionally with other relevant teams to carry out implementations that will improve and create an impact on customer experience.

Scalable Growth – Be part of a fast‑growing organization with the vision to expand its territories outside APAC which will provide opportunities for career advancement.

A Space For Bright Ideas – Let your bright ideas be converted into meaningful changes! Coins culture welcomes new ideas backed up by data to create an impact.