Integration & API Tester (IBM WebMethods)

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.