Senior Functional Tester (API Automation & UI Manual Testing)
Brussels-Capital
Digital - Testing and QA
Work experience: 7-10
Reference number: 92701
You will be responsible for validating that software applications function correctly at both functional and technical levels.
You work as part of a software delivery team, collaborating closely with functional analysts, developers, and engineers.
Your role covers end-to-end testing activities, from integration and qualification to user acceptance support, with a strong focus on quality assurance and continuous improvement.
Your responsibilities include
- Defining and maintaining the overall test strategy for assigned applications and projects.
- Reviewing business requests, functional analyses, and technical documentation from a testing perspective.
- Designing, creating, and executing test cases, test scenarios, and test plans.
- Performing manual UI testing and automated API testing.
- Following up on defects and issues, including reporting, tracking, and validation of fixes.
- Producing structured test reports and quality status updates.
- Automating test cases using appropriate tools based on technology and context.
- Supporting delivery teams by estimating testing effort and contributing to test planning.
- Participating in end-to-end testing involving external partners.
- Supporting end users during user acceptance testing (UAT).
- Contributing to continuous improvement of testing processes, standards, and deliverables.
- Supporting quality assurance initiatives across the software delivery lifecycle.
What are we looking for?
- You hold a Bachelor’s degree or higher.
- You have a minimum of 5 years of relevant experience in software testing.
- You have proven experience with manual UI testing.
- You have proven experience with automated API testing.
- You have experience defining and executing test strategies.
- You have strong knowledge of testing processes and methodologies.
- You have experience testing Java-based services, web services, and REST APIs.
- You have experience working with XML, XSD, WSDL, and related open standards.
- You have solid experience analysing and modelling complex processes and workflows.
- You have hands-on experience with Jira, Xray, and ReadyAPI.
- You have experience working in Agile delivery environments.
- You have experience with Groovy scripting or an equivalent scripting language.
- You are fluent in Dutch and English OR French and English, and have a good understanding of the third language.
- ISTQB certification.
- Experience with Katalon or Selenium.
- Basic knowledge of OWASP security testing principles.
- Experience working with public administration systems.
What do we offer?
Location: Brussels (Hybrid)
Onsite presence: Minimum 2 days per week (mandatory)
Fixed onsite day: Monday
Second onsite day: Wednesday or Friday
Contract: Freelance or Permanent
Start date: 02 February 2026
End date: 31 December 2026
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Kenneth Van Cleynenbreugel
Business & Talent Consultant
+32473822673
