QA Integration Engineer

About the Role

Master-Works is seeking a QA Integration Engineer to ensure the robustness, reliability, and security of enterprise integration flows and middleware components. This full-time role focuses on systems built on the IBM webMethods integration layer. The position requires 5-10 years of experience, with a specific focus on developing comprehensive test plans, automating API verification, and executing rigorous scenario-based testing across various platforms.

Role Context and Focus

The QA Integration Engineer will work with core operational back-office platforms, third-party web services, and middle-tier microservices. This involves validating integration points and ensuring seamless data exchange and functionality across complex distributed systems.

Key Responsibilities

• Review integration specifications, Swagger/OpenAPI documentation, and data mapping sheets to formulate end-to-end testing strategies.
• Design, build, and execute functional, regression, boundary, and negative test scenarios for REST and SOAP APIs running across IBM webMethods.
• Validate bidirectional data exchange and state changes between external/internal APIs and underlying operational systems (ERP, enterprise asset management, legacy databases).
• Build and maintain automated API test suites integrated with CI/CD deployment pipelines.
• Conduct payload structure validation, schema validation (JSON/XML), data transformation checks, and transaction rollback verification.
• Execute non-functional integration testing, including rate limiting, API latency benchmarks, error-handling resilience, and token authentication (OAuth, mTLS).
• Track and document integration defects, coordinate root-cause analysis with the webMethods development team, and monitor fixes to closure.

Qualifications and Experience

• Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or equivalent practical experience.
• 5+ years of dedicated software quality assurance experience.
• At least 2 years of experience focused specifically on middleware, microservices, and API integration testing.
• Direct working knowledge of testing within Enterprise Service Bus (ESB) or integration middleware ecosystems (IBM webMethods, Software AG, or comparable platforms like MuleSoft/TIBCO).

Required Skills

• High proficiency in API testing tools such as Postman, Newman, SoapUI, ReadyAPI, or JMeter.
• Strong grasp of API authentication protocols, message brokers, HTTP status code semantics, and distributed system architectures.
• Proficiency in writing complex SQL queries to validate database-level state changes after API execution.

Preferred Qualifications

• ISTQB Certified Tester (Advanced Level - Technical Test Analyst or Agile Tester), Postman API Fundamentals / Certified Automation, and IBM Certified Associate (webMethods) certifications.
• Skills in automated testing scripts (Python/JavaScript), CI/CD test automation (Azure DevOps/GitLab), XML/JSON parsing, and mock service virtualization.