Key Skills

Job Description

At Starion, we combine software engineering, innovation and space technology to tackle complex challenges. Now, we're looking for a motivated Junior / Medior C# Developer to join our software development team in Leiden, the Netherlands. Whether you're a recent graduate with hands-on development experience or already have a few years of professional experience, this is an opportunity to grow your skills and take on exciting technical challenges. You'll work with modern technologies such as C#, .NET, WPF, Blazor and PostgreSQL, developing innovative engineering and business applications. One of your initial projects will involve data-driven software solutions supporting the Dutch Ministry of Defence. Please note: Due to the nature of this position, undergoing Dutch security clearance is a mandatory requirement. Tasks and Activities 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 Fluency in Dutch and English, both written and spoken. A degree in Software Engineering or a related discipline. 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. The following skills and experience would be highly desirable: 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. 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.

Core Responsibilities

Design, develop, and maintain data-driven engineering and business applications, including design-critical software and tools, frameworks, and libraries. Verify and validate software quality, reliability, and performance, and optimize collaborative systems for scalability, efficiency, and user experience.

Requirements

Candidates need a degree in Software Engineering or a related discipline, experience developing applications with C# and .NET, and a solid background in both backend and frontend development. Fluency in Dutch and English, relational database experience, familiarity with Git, and the ability to obtain Dutch security clearance are required; experience with WPF, Blazor, testing, CI/CD, and related technologies is desirable.

Benefits

• Ongoing Training
• Mentoring
• Professional Development Opportunities
• Flexible Working Arrangements