I will test your fintech, payments, or crypto platform for bugs

I test payment and transaction flows for a living. I currently lead QA on a live crypto trading platform (web, Android, iOS), and previously tested payment authorization, capture, and refund lifecycles, plus cashback logic across multiple payment methods, for an e-commerce platform. I know where money-flow bugs hide rounding errors, failed state transitions, duplicate charges, broken refund logic and I test with that risk-first mindset, not just clicking through happy paths.