C# Developer

Your Mission

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

You’ll have the opportunity to:

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

What We’re Looking For

Ideally, you will have:

• 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.  
• 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. 
• 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.

Why Make the Move?

• Make an impact where it matters. Contribute to high profile projects supporting organisations such as ESA, EUMETSAT, the European Commission, NATO and national defence programmes.
• Work alongside some of Europe’s brightest minds. Join an international team of experts who thrive on collaboration, innovation and solving complex challenges that deliver real-world results.
• Grow beyond a single project. Join a growing international organisation and broaden your experience across a variety of projects and technical disciplines.
• Invest in your future. Benefit from ongoing training, mentoring and professional development opportunities designed to support both your personal and professional growth.
• Join a company that puts people first. Guided by our values of Integrity, Inspiration, Care and Collaboration, we offer a supportive culture, flexible working arrangements.

Equal Opportunities

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.

Important Eligibility Requirements

Due to the nature of the projects, this position is currently open to Dutch nationals.

That said, we encourage suitably qualified professionals to apply even if you do not meet this requirement. Should a similar opportunity arise without this nationality restriction, we would be pleased to consider your application for future roles.