Rhox

Test Engineer, Niveau Expert

Closes on 16/10/2026
Brussels
Hybrid, 60% on site
Starts on 01/12/2026
Remuneration: 4.250 - 5.250 EUR/mo gross+ extralegal advantages ·Freelance also possible

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We're looking for a hands-on expert test engineer to implement for a cloud-based solution using APIs, and .

What you'll do

  • Turn the test strategy into an operational test plan.
  • Validate business logic, data integrity and E2E user flows.
  • Test API contracts, security and integration with external systems.
  • Run performance, stress and load tests.
  • Develop automated test suites within .
  • Implement monitoring and logging across development, test and acceptance environments.

What you bring

  • 10+ years' testing experience; hands-on implementation, integration and use during the last five working years.
  • Higher education degree in computer science.
  • Five years with , API and UI test frameworks; good DOM knowledge.
  • Five years with regression, integration, E2E, performance, stress and load testing.
  • Five years with contract testing, mocking and service .
  • Five years with monitoring, observability and build tools.
  • Five years implementing and integrating tests.
  • Five years scripting in and .
  • Three years programming with SE10+ and using SQL databases.
  • Five years working in delivery teams.
  • Clear communication with technical and non-technical stakeholders; ability to recommend alternatives.
  • Ongoing learning in engineering, development and testing.
  • or , B2.
  • , B2.

Nice to have

  • , Bruno, , , , JMeter, Gatling, Maven or Azure DevOps.
  • and development; development and integration.
  • Cloud, API, microservice and event-based software design.
  • Event-driven architecture, Event Driven Development, or .
  • Knowledge of existing building blocks and services.

What's next?

The people who do well here are the ones who saw themselves in this description. Not because they match every line, but because the mission felt right for them.

We are actively hiring for this position. Applications are reviewed by our team, and matching profiles receive a call to discuss the role in detail.

It takes under a minute to apply. Your email, your CV. That is all we need to start the conversation.