About the Mission

Assignment context: RSVZ is a dynamic organization where more than 150 people work within the Information Technology department. The organizational culture is informal. RSVZ is a bilingual environment with French-speaking and Dutch-speaking colleagues and stakeholders. We are currently looking for an experienced .NET Integration Developer to expand team Black (consisting of 12 people, including 2 Integration Developers). Team Black is a “platform” team that works transversally within Informatica and provides technical support to the development teams. The team works according to SAFe (Scaled Agile Framework) methodology to deliver high-quality and scalable applications.  The team’s current focus is on making the Azure Cloud platform usable for other development teams. Role: The experienced .NET Integration Developer is responsible for the design, development and maintenance of a robust and scalable integration platform in an Azure environment. This person works closely with other employees of the IT department (developers, testers, product owners and scrum masters) to deliver functionalities iteratively and incrementally.  Key Responsibilities: Design, development and maintenance of the integration platform and reusable .NET components using C# and Azure API Management.  Analyze and solve technical problems. You are responsible for solving bugs and providing technical support to less experienced colleagues within and outside your development team. Contact with external parties, including other social security institutions in the context of connectivity. Design, develop and maintain reusable Azure DevOps CI/CD components using C#, Powershell, YAML pipelines and Bicep files. Collaborate with cross-functional, agile teams within a SAFe environment: you work closely with other developers, testers, architects, product owners and scrum masters to iteratively and incrementally deliver supporting tooling. Participate in PI Planning and other Agile ceremonies. Quality assurance and code reviews: You are responsible for conducting code reviews and ensuring code quality through unit tests, integration tests and other QA methods. Contribute to technical documentation and knowledge sharing within and outside the team. You prepare the technical documentation and check the documentation drawn up by less experienced colleagues. Provide technical leadership and mentor less experienced team members. Continuously improving development processes and software quality. You follow trends and developments in technologies and methodologies in your domain.  Automation and continuous integration by setting up pipelines, unit tests to ensure a stable and functional development, test and production environment. Required experience and competencies: Bachelor or Master degree in Computer Science or equivalent experience.  Minimum 5 years of experience in a similar role. 5 years of experience working with Azure 5 years of experience working according to Agile/Scrum. Behavioral skills: Good communication skills, both oral and written. Being able to clearly explain technical concepts to technical stakeholders. Excellent problem solving and analytical skills. Continuous learning and improvement: a mind set focused on continuous improvement and learning new technologies and methodologies. Collaborative. Adaptability and flexibility: the ability to quickly switch between different tasks and priorities. Dealing flexibly with changes and unexpected obstacles. Excellent technical coaching skills. Ability to work proactively and autonomously Sense of responsibility Customer-oriented Languages: French or Dutch 2nd national language: understanding and basic written and oral communication English: understanding and basic written and oral communication Hybrid working: 5 days working week, of which at least 2 days in the office. Teleworking is possible on the other days.

Required Skills

Enterprise Integration Patterns (Nice to have), Ervaring met Azure en Bicep, Ervaring met OAuth Client Credential Flow, Ervaring met RESTful API design met behulp van de OpenAPI specificatie, GIT, gRPC (gRPC Remote Procedure Calls) (Nice to have), NServiceBus (nice to have), Sterke kennis Azure DevOps CI/CD pipelines, Sterke kennis van .NET, C# en ASP.NET Core, Sterke kennis van Azure API management, Sterke kennis van Azure Service Bus, Windows communication foundation (WCF) (Nice to have)

Practical Information

  • Company: SMALS
  • Location: Brussels – Hybrid
  • Start Date: 27 July 2026
  • End Date: 31 December 2026
  • Duration: 6 months
  • Contract Type: Freelance / Mission
  • Application Deadline: 15 July 2026