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Important information
Contract type:
Freelance
Daily rate:
Salary according to profile
Location:
Brussels, Belgium
Starting date:
Urgent
Work mode:
Hybrid
Published on:
27 April 2026
What they need
Role & Responsibilities
As a Test Engineer, you will be responsible for the full testing lifecycle, from design to execution and automation:
Plan, execute, and support different testing phases: Integration, Regression, and Business Acceptance Testing
Design and maintain test plans and test cases (e.g., in Octane)
Develop and maintain automated tests using Java, Rest-Assured, and Cucumber (BDD)
Build comprehensive test suites for RESTful APIs (functional, regression, contract testing)
Integrate automated tests into CI/CD pipelines (Jenkins, GitHub Actions)
Define and manage test data strategies, including mocking external dependencies (e.g., mainframe APIs)
Analyze API responses (status codes, payloads, performance, security)
Collaborate closely with developers to identify, reproduce, and resolve defects
Support Business Acceptance Testing (BAT) with business stakeholders
Act as a quality advocate, promoting shift-left testing and TDD/BDD practices
Participate in Agile ceremonies (refinement, planning, retrospectives)
Translate business requirements into executable test scenarios (Gherkin)
Monitor and report on test coverage, defect trends, and automation performance
Mentor junior team members on testing best practices and tools
Continuously improve testing approaches and propose innovations
Profile wanted
Experience
Minimum 5+ years of experience in IT Testing
Strong experience in API Test Automation
Technical Skills
Mandatory
Strong experience with:
Java (8+)
Rest-Assured
Cucumber (BDD)
Solid background in:
API testing (RESTful services)
Functional, integration, and regression testing
Experience with:
CI/CD tools (Jenkins, GitHub Actions)
Version control (Git)
Mocking frameworks (Mockito, WireMock)
Knowledge of:
Authentication methods (OAuth2, Basic Auth)
Test design (edge cases, negative scenarios, data-driven testing)
Nice to have
Swagger / OpenAPI
Oracle databases
Mainframe integrations
Performance & security testing (OWASP basics)
Business Knowledge
Understanding of credit/loan processes (mortgage is a strong plus)
Experience in financial services or banking environments is highly desirable
Languages
English: Fluent (mandatory)
French / Dutch: Nice to have
Education & Certifications
Master’s degree or equivalent experience
Certifications (ISTQB, Agile Testing, API testing tools) are a plus
Soft Skills
Strong analytical mindset
Proactive and solution-oriented
Detail-oriented with high quality standards
Team player with strong communication skills
Comfortable in Agile environments
Mentoring mindset
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