QA Engineer - Payment

Own end-to-end functional and non-functional testing for payment products spanning mobile apps, backend services, and payment systems. Partner with product managers, developers, and stakeholders to verify stability, security, and compliance across payment gateways, merchant acquiring, and third-party payment workflows. Perform backend API and database validation, analyze transaction flows for security risks, and keep QA aligned with Agile sprint delivery while staying current on payment and telecom compliance standards.