Integration & API Tester (IBM WebMethods)

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Job Summary We are looking for an experienced Integration & API Tester (IBM webMethods) to validate enterprise integrations, APIs, middleware services, and end-to-end message flows. The ideal candidate will have hands-on experience in IBM webMethods, REST/SOAP API testing, integration testing, and data validation across multiple systems. The candidate should be capable of identifying integration issues, validating error-handling mechanisms, and ensuring reliable data exchange between internal and external applications. Key Responsibilities Perform integration testing of enterprise applications, middleware services, APIs, and message flows using IBM webMethods. Conduct functional, negative, and end-to-end API testing for REST and SOAP services. Validate data integrity, consistency, and accuracy across interconnected systems. Test idempotency, retry mechanisms, timeout handling, error responses, and exception-handling scenarios. Validate request and response payloads, headers, status codes, schemas, and business rules. Design, develop, and execute test cases, test scenarios, and test data for integration workflows. Use API testing tools such as Postman and SoapUI to validate API functionality and service behaviour. Verify message transformation, routing, and data mapping across integrated applications. Identify, document, track, and retest defects in collaboration with development and integration teams. Perform regression testing following middleware configuration changes, API updates, and defect fixes. Collaborate with developers, business analysts, and technical teams to troubleshoot integration failures. Prepare test execution reports, defect summaries, and test completion documentation. Required Skills & Experience Hands-on experience with IBM webMethods and enterprise integration testing. Strong knowledge of REST and SOAP APIs, including request/response validation and HTTP status codes. Experience with middleware, message flows, and system-to-system integrations. Proficiency in API testing tools such as Postman and SoapUI. Experience validating data integrity, data mapping, transformations, and consistency across systems. Strong understanding of functional, negative, regression, and end-to-end integration testing. Practical experience testing idempotency, retries, timeouts, exception handling, and failure scenarios. Ability to analyse API responses, logs, and integration errors to identify root causes. Experience in test case design, defect reporting, and test documentation. Strong analytical, troubleshooting, communication, and problem-solving skills. Preferred Skills Experience with API automation and scripting. Knowledge of JSON, XML, XSD, and message payload validation. Familiarity with SQL and database queries for backend data verification. Understanding of authentication and authorization mechanisms, including OAuth 2.0 and API tokens. Exposure to CI/CD pipelines and automated regression testing. Experience working in Agile/Scrum environments and using defect-tracking tools such as Jira. Education Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline, or equivalent practical experience.