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Senior Test Engineer - Freelance

Collective.work | Brussels, Belgium | Posted May 28, 2026

Position Overview

Job description


Daily rate: 500

As part of a major IT modernization program, we are looking for two Senior Manual Testers to support the transformation of a legacy platform into a modern microservices-based architecture using Kubernetes, within an API-first and event-driven environment.


Responsibilities:


• Preparation of test plans and design of test cases
• Execution of functional and non-functional manual tests
• Documentation and tracking of defects
• API testing (Postman, SoapUI, OpenAPI, JSON, DLQ, versioning, pagination, etc.)
• Close collaboration with Agile / Scrum teams
• Participation in exploratory testing and business validation


Requirements


Candidate Profile


Required Skills:


• Strong expertise in manual testing
• Agile / Scrum: Expert level
• BDD: Expert level
• Gherkin: Expert level
• Jira / Confluence / Xray: Expert level
• API testing: Expert level
• Good pr...

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