Senior Functional Tester
Brussels-Capital
Digital - Testing and QA
Master
Work experience: 5-7
Reference number: 91986

A major player in the European energy landscape is undergoing a wide operational and digital transformation. Due to the shift to renewable energy and large-scale modernization of maintenance processes, numerous complex IT projects are underway. To support this evolution, we are looking for a Senior Functional Tester who will take over all testing activities that currently limit business analysts from focusing on higher-value analysis work.

What you’ll do

  • Review business requirements and translate them into a clear, structured test plan.
  • Write detailed functional and regression test scenarios based on process flows, diagrams, and business specifications.
  • Prepare and manage test data, ensuring consistency across refreshed test environments.
  • Execute functional tests and regression tests end-to-end within complex multi-system environments.
  • Log defects, follow up on resolutions, and challenge stakeholders where needed.
  • Collaborate closely with business analysts, developers, and project teams to clarify requirements and ensure test coverage.
  • Contribute to the organization of UAT and support business teams during acceptance phases.
  • Work autonomously within a large transformation program and help improve testing processes and quality standards.
  • Provide input to optimize testing frameworks and documentation across projects.
  • Operate in a hybrid environment with multiple systems, integrations, and industrial asset workflows.

What are we looking for?

  • You have a master’s degree in a technical or economic field, or equivalent experience.
  • You have a minimum of 5 years of experience preparing and executing functional and E2E tests.
  • You have proven experience writing test plans and test scenarios.
  • You bring several years of experience as a Test Coordinator in a complex project environment.
  • You are skilled in interpreting process flows and class diagrams, with knowledge of BPMN and UML.
  • You have experience with Jira and Enterprise Architect (EA) or similar tools.
  • You ideally have experience in the electricity sector or in maintenance of industrial assets.
  • You speak English fluently and have an excellent command of Dutch or French, with passive understanding of the second national language.

What do we offer?

  • Location: Brussels (hybrid)
  • Duration: Until end of 2026 (extendable)
  • Contract: Permanent or Freelance

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