Job Description
Senior Application Tester / QA Engineer (Hybrid – Brussels)
We are looking for an experienced Senior Application Tester / QA Engineer to support a large-scale modernization program focused on migrating a legacy platform to a modern microservices and Kubernetes-based architecture.
The role involves ensuring software quality across API-driven and event-based systems while working closely with Agile delivery teams in a complex enterprise environment.
Key Responsibilities
Design, prepare, and execute manual and automated test plans and test cases
Validate functional and non-functional requirements
Perform API testing and integration testing across distributed systems
Identify, document, and track defects and quality issues
Support exploratory testing and edge-case analysis from an end-user perspective
Contribute to Agile/Scrum delivery processes and continuous quality improvement
Coach and support team members on testing best practices
Collaborate with developers, analysts, QA teams, and stakeholders to ensure software quality
Produce clear reporting and documentation of testing activities and results
Required Skills & Experience
Strong experience in software testing within Agile environments
Expertise in:
BDD and Gherkin
API testing (Postman, SoapUI, OpenAPI)
Jira, Confluence, and Xray
Test planning, defect management, and test documentation
Message queue testing (ActiveMQ, RabbitMQ, DLQ handling)
JSON, API versioning, pagination, idempotency, and error semantics
Good understanding of programming logic and system interactions
Experience with exploratory testing and critical quality analysis
Knowledge of Selenium and Playwright is considered a plus
ISTQB or similar testing certifications are highly valued
Languages
English: Active knowledge
French and/or Dutch: Nice to have
Work Conditions
Hybrid working model
Long-term strategic modernization program involvement
Location
Brussels
