Key Responsibilities 

• Perform manual testing of web applications, backend services and end-to-end product workflows, ensuring functionality, reliability and consistency across systems.

• Test and validate merchant-side Server-to-Server (S2S) integrations, ensuring seamless data exchange, accurate transaction processing and reliable communication between TWID and merchant systems.

• Conduct backend API testing using tools such as Postman, validating request and response structures, HTTP status codes, API behaviour, business logic and error handling.

• Perform comprehensive negative testing and validate boundary conditions, timeouts, retries, unexpected API responses and failure scenarios to ensure system reliability.

• Validate end-to-end transaction lifecycles, including transaction initiation, success, failure, pending states, reversals, refunds and duplicate transactions, ensuring accurate transaction status updates and appropriate reversal or rollback handling.

• Write and execute MySQL queries to validate backend data, verify transaction records, reconcile API responses with database entries and identify data inconsistencies.

• Prepare and execute detailed test cases, test scenarios and test plans based on functional requirements, product specifications and integration workflows.

• Perform Functional, Regression, Integration, Smoke, Sanity and End-to-End testing to ensure product quality across releases.

• Validate transaction flows, API responses, database entries and integration behaviour across multiple systems, ensuring consistency and accuracy throughout the transaction lifecycle.

• Identify, document, track and follow up on defects, providing clear reproduction steps, relevant test evidence and detailed observations to support timely resolution.

• Collaborate closely with Engineering, Product and cross-functional teams to understand requirements, clarify expected behaviour, identify edge cases and ensure quality throughout the development lifecycle.

• Use AI-powered coding assistants and code-generation tools to improve test case creation, expand test scenario coverage and enhance testing productivity, while independently reviewing and validating the generated outputs.

• Maintain test documentation, execution reports and defect records, ensuring clear visibility into testing progress, coverage and product quality.