Location:Diegem , Belgium Location: Application deadline: 11 February 2026 Reference number: 0421

Are you looking for a new opportunity to take your career to a higher orbit? To join an international group with a successful track record in Space Engineering? A job adapted to your career ambitions and in which you could have an impact for the years to come?

We’re looking for a skilled C# Software Engineer with experience in backend web application development to join our team in Diegem, near Brussels, Belgium.

You will work within a multidisciplinary team to build a next‑generation, web‑based MBSE platform aligned with the new SysML v2 standard and powered by the CDP4‑COMET framework. The platform supports collaborative, concurrent engineering workflows for complex systems across domains such as aerospace and automotive. You will contribute to developing tools used by system engineers, domain specialists, and project reviewers.

Tasks and activities

The scope of work will include:

• Developing and maintaining core platform components using C#, .NET, and ASP.NET Blazor
• Enhancing the SysML2.NET SDK to comply with the final SysML v2 specification.
• Implementing backend services, RESTful APIs, and Systems Modelling API endpoints using .NET Core.
• Supporting model server development, including data persistence, access control, and messaging.
• Integrating authentication and role‑based access controls using JWT, OIDC, LDAP, and related technologies.
• Supporting migration tooling from ECSS‑E‑TM‑10‑25 and SysML v1 to SysML v2.
• Writing and maintaining automated unit and integration tests; contribute to the CI/CD pipeline.
• Participating in SCRUM sprint planning, reviews, and daily stand-ups with a cross-functional team.
• Working closely with the UI/UX responsible to integrate frontend components and data bindings.

Skills and experience

The following skills and experience are mandatory:

• Bachelor’s or Master’s degree in Computer Science, Software Engineering, or a related field.
• 3+ years of professional software development experience with C# and the .NET ecosystem.
• Experience with ASP.NET Core and Blazor, or a willingness to learn quickly.
• Strong understanding of software design patterns, modular architecture, and web development.
• Familiarity with RESTful API development and skilled in Git, CI/CD, and agile practices.
• Desire to work both autonomously and as part of a team, in an international multicultural environment.
• Solution oriented mindset, with a customer focused communication skill.
• Fluent in English, both written and spoken.

The following skills and experience would be highly desirable:

• Experience with model-based systems engineering (MBSE), SysML, UML, or DSLs.
• Familiarity with serialization formats (JSON, MessagePack, XMI) and performance profiling.
• Knowledge of cloud deployment (Docker, Kubernetes, Azure or AWS).
• Experience working on open-source projects or distributed international teams.
• Understanding of secure software development practices and authentication protocols.

Why should you apply?

• You will have the opportunity to work within leading space organisations across Europe.
• We encourage everyone to think outside the box and to push the boundaries of traditional knowledge. This role is an opportunity to join a forward-thinking company and allows for a deeper understanding of the industry.
• To be part of a company that values integrity, inspiration, care and collaboration.
• Benefits include: competitive remuneration packages; unique career opportunities, including working in other countries; access to training and development programmes; flexible relocation support.

We are proud to be an equal opportunity employer,committed to achieving diversity within the workforce and creating an inclusive working environment. We therefore welcome applications from all candidates, irrespective of gender, sexual orientation, ethnicity, religious beliefs, age, disability or other characteristics.

As part of our commitment to providing an inclusive and barrier-free recruitment process, we will provide reasonable adjustments and support to ensure neuro-diverse applicants or those with a disability or long-term condition can be their best during the recruitment process.

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