Senior QA Integration Engineer - API & Middleware Expert

Master-Works; Makkah Region; On-site; SAR 180,000 - 300,000; Full time

Job summary

Master Works seeks a QA Integration Engineer to strengthen enterprise integration testing across IBM webMethods and middleware components. You will design test plans, automate API verification, and run scenario-based tests across core back-office systems and microservices.

You will validate data flows, oversee CI/CD test automation, and ensure security and reliability of integrations through rigorous non-functional testing and defect tracking.

Qualifications

• 5+ years of dedicated software quality assurance experience, with at least 2 years 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).
• 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.
• Skills in automated testing scripts (Python/JavaScript), CI/CD test automation (Azure DevOps/GitLab), XML/JSON parsing, and mock service virtualization are preferred.

Responsibilities

• Review integration specifications, Swagger/OpenAPI docs, 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.

Skills

API testing

CI/CD

SQL queries

Automation scripting

Security testing

Education

Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or equivalent practical experience

ISTQB Certified Tester (Advanced Level - Technical Test Analyst or Agile Tester)

Postman API Fundamentals / Certified Automation

IBM Certified Associate (webMethods)

Tools

Postman

Newman

SoapUI

ReadyAPI

JMeter

Job description

Master Works seeks a QA Integration Engineer to strengthen enterprise integration testing across IBM webMethods and middleware components. You will design test plans, automate API verification, and run scenario-based tests across core back-office systems and microservices.

You will validate data flows, oversee CI/CD test automation, and ensure security and reliability of integrations through rigorous non-functional testing and defect tracking.