Test Engineer 

Location:

Brussels

Start Date:

18/05/2026

End Date:

31/08/2027

Mission Context:

The Test Engineer specializing in Regression Testing and Test Automation is tasked with ensuring faster, quality releases by adopting effective regression testing in Agile and DevOps practices. This role is crucial for the timely delivery of high-quality products, ensuring all features are tested end-to-end.

Function Description:

• Manage tests from creating test plans and test cases in Octane to developing automated tests and conducting integration tests.

• Support business acceptance tests and collaborate closely with developers, product owners, and DevOps teams.
• Enhance test coverage, reduce manual testing efforts, and accelerate delivery while maintaining high software quality standards.
• Plan, execute, and support various testing instances (Integration, Regression, Business Acceptance).
• Develop automated tests using Java, Rest-Assured, and Cucumber (BDD approach) for backend services related to mortgage loan processing.
• Develop comprehensive test suites for functional, regression, and contract testing for RESTful APIs.
• Integrate the framework with CI/CD pipelines (e.g., Jenkins, GitHub Actions) for automated test execution in Agile sprints.
• Define and maintain test data strategies, including mocking external dependencies for isolated and reliable test execution.
• Analyze API responses for correctness, performance, and security.
• Collaborate with developers to identify and troubleshoot defects.
• Act as a quality advocate within the squad, promoting shift-left testing and test-driven development (TDD/BDD) practices.
• Participate in Agile ceremonies to contribute to testability improvements and risk mitigation strategies.
• Work with Product Owners to refine acceptance criteria and translate business rules into executable test scenarios (Gherkin).
• Monitor and report on test coverage metrics, defect trends, and automation efficiency.
• Mentor junior team members on API testing best practices and automation techniques.
• Stay updated on emerging testing tools and methodologies and propose innovations to the squad.

Education:

Master’s degree or equivalent by experience.

Certifications:

Certifications in testing (e.g., ISTQB, Agile Testing) or API technologies (e.g., Rest-Assured, Insomnia) are a plus.

Languages Requirement:

• French: Not required but nice-to-have

• Dutch: Not required but nice-to-have
• English: Fluent

Telework Expectation:

50% on-site & 50% homeworking

Required Knowledge / Experience:

5+ years of experience in IT Testing.

Technical Experience:

• 5+ years of experience in API test automation using Java, Rest-Assured, and Cucumber.

• Strong background in functional, regression, and integration testing for APIs.
• Ability to design test cases covering positive/negative scenarios, edge cases, and data-driven testing.
• Experience with mocking frameworks (e.g., Mockito, WireMock).
• Hands-on expertise with RESTful APIs, including request/response validation, authentication, and error handling.
• Proficiency in Java 8+ and Spring Boot for backend testing and mocking.
• Experience with version control (Git) and CI/CD tools (Jenkins, GitHub Actions).

Preferable:

• Knowledge of Swagger/OpenAPI for API documentation and contract testing.

• Familiarity with databases (Oracle) and mainframe integrations.
• Basic understanding of performance testing and security testing (OWASP principles).

Business Experience:

Understanding of credit/loan processes (mortgage lending is a strong plus).

Soft Skills:

• Analytical mindset: Ability to break down complex systems into testable components.

• Collaborative, Transparent & Communicative: Works effectively with developers, DevOps, and business stakeholders.
• Proactive: Identifies gaps in test coverage and proposes solutions.
• Detail-oriented: Ensures accuracy in test data, assertions, and defect reporting.
• Adaptable: Thrives in a fast-paced Agile environment with evolving priorities.
• Mentorship: Willingness to share knowledge and uplift team members.