Head of Security & Transaction Integrity

Position: Head of Payment Security & Transaction Integrity
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.
Role Summary
Coins is seeking a senior leader to establish and own our Payment Security and Transaction Integrity function. This role is responsible for protecting the integrity of payment flows across QRPH, Wallet, Merchant Payments, Crypto‑Fiat rails, and future payment products. Unlike traditional cybersecurity roles, this position focuses on business logic vulnerabilities, payment fraud, transaction manipulation risks, settlement integrity, and adversarial testing of payment systems.
Responsibilities
Payment Security Architecture

Review and approve payment flow designs before production launch
Conduct payment threat modeling for all new payment products
Define secure transaction integrity standards
Establish source‑of‑truth and immutable payment context frameworks

Transaction Integrity

Prevent amount tampering, currency manipulation, replay attacks, merchant spoofing, and settlement abuse
Build transaction verification controls and payment validation mechanisms
Define critical payment control requirements across all payment products

Adversarial Testing

Establish a Payment Red Team program
Simulate malicious user behavior against payment systems
Conduct business logic attack testing and abuse‑case validation

Incident Response

Lead investigations of payment‑related security incidents
Conduct root cause analysis and drive remediation
Build a payment incident review and governance framework

Fraud & Risk Partnership

Partner with Fraud, Risk, Operations, Compliance, and Engineering teams
Design monitoring and alerting frameworks for transaction anomalies
Reduce financial losses caused by abuse, fraud, and system weaknesses

Governance

Chair Payment Security Review Board
Define payment security standards and launch approval processes
Create risk acceptance and escalation frameworks

Requirements

8+ years in payments, fintech, acquiring, banking, or transaction risk
Deep understanding of payment systems, merchant acquiring, settlement, reconciliation, and transaction processing

Experience with payment fraud, transaction abuse, or payment security
Strong understanding of business logic vulnerabilities and adversarial thinking
Ability to work across Engineering, Risk, Compliance, and Operations teams

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