• Design, develop, and maintain automated test frameworks for APIs, backend services, and web applications related to the EBizCharge payment gateway • Write and execute automated tests for payment flows including authorization, capture, refunds, voids, tokenization, and recurring payments • Validate PCI-compliant workflows and ensure secure handling of sensitive payment data • Perform API testing (REST/SOAP) for gateway services, integrations, and third-party processors • Conduct integration, regression, and end-to-end testing across ERP and accounting system integrations • Collaborate with software engineers to identify test gaps, reproduce issues, and improve testability • Monitor and improve test coverage, reliability, and execution time in CI/CD pipelines • Perform performance and load testing to ensure the gateway handles high transaction volumes • Participate in code reviews with a quality-first mindset • Document test strategies, test cases, and quality metrics