C# Developer

Location: Leiden, Netherlands Location: Application deadline: 2 November 2026 Reference number: 0571
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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 years to come?

Join our software development team in Leiden, the Netherlands, as a C# Developer. Working with C#, WPF, Blazor and PostgreSQL, you will help deliver innovative engineering and business applications, with an initial focus on data-driven solutions for the Dutch Ministry of Defence. This position is well suited to both recent graduates with relevant practical experience and software engineers with a few years of professional experience. 

Tasks and activities

The scope of work will include:

  • Designing, developing and maintaining complex data-driven applications that support critical business and engineering activities.
  • Building and enhancing design-critical software solutions used during the early phases of engineering and system development.
  • Performing verification and validation activities to ensure software quality, reliability and performance.
  • Optimising high-throughput collaborative systems, enhancing scalability, efficiency and user experience.
  • Designing and developing supporting tools, frameworks and libraries that enable efficient software delivery and long-term maintainability.

Skills and experience

The following skills and experience are mandatory:

  • A degree in Software Engineering or a related discipline.
  • 3-5 years of experience developing applications in C# and .NET.
  • A solid background in both backend and frontend application development. 
  • Proficiency in working with relational databases, preferably PostgreSQL.  
  • Strong problem-solving skills, with the ability to work both independently and collaboratively.  
  • Excellent communication skills and a customer-focused mindset.
  • Fluency in Dutch and English, both written and spoken.

The following skills and experience would be highly desirable:

  • Familiarity with Git, GitHub and/or GitLab.  
  • Hands-on knowledge with WPF, Blazor, MVVM.  
  • Knowledge of Test-Driven Development (TDD) and software quality practices. 
  • Experience working on large-scale software projects.  
  • Knowledge of CI/CD pipelines and modern development practices.  
  • Experience with data modelling (e.g. UML, Ecore).  
  • Familiarity with Linux, Docker, and web/mobile development using TypeScript or JavaScript. 

Eligibility Requirements

At Starion, we are committed to building diverse and inclusive teams and encourage applications from all backgrounds. Please note that, due to security requirements linked to this specific assignment with the Dutch Ministry of Defence, candidates must hold Dutch nationality to be eligible for the role.

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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me

Questions? Contact

Natalia Batres-Günther

Recruiter

Interested in this job?

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