Head of Payment Security & Transaction Integrity

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