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# Senior C# Software Engineer - Rotterdam - ALTEN

- **Company:** Alten Nederland B.V.
- **Location:** CAPELLE AAN DEN IJSSEL, Netherlands
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Clean Code Principles, .NET Framework, Software Applications, Unit Testing, C Sharp (Programming Language), C++ (Programming Language), Software Quality, Code Review, Software Design Patterns, Object-Oriented Software Development, Software Architecture, Software Engineering, Information Technology
- **Published:** May 31, 2026
- **Apply:** https://nl.indeed.com/viewjob?jk=66afb4debad50e45

## About the Role

Do you have experience in Software development?, Do you have a Master's degree?, * Bachelor's or Master's degree (HBO/WO) in Computer Science, Software Engineering, or a related discipline

 * 5+ years of professional experience in C#/.NET software development (Medior to Senior level)
 * Solid understanding of object-oriented programming, design patterns, and software architecture principles
 * Experience with modern .NET frameworks, tooling, and development workflows
 * C++ knowledge is a strong plus
 * Strong analytical and problem-solving abilities
 * Excellent communication skills for effective collaboration with colleagues and clients
 * Proactive mindset with eagerness to learn, improve, and explore new technologies
 * Fluent in English (spoken and written)

## Description

As part of our expanding team, we are looking for a talented C# Software Engineer to join us in Rotterdam and contribute to impactful, high-tech client projects across a variety of industries.

As a C# Engineer, your main tasks will include:

 * Designing, developing, and maintaining high-quality software applications using C# and the .NET ecosystem
 * Translating technical specifications into robust, scalable, and efficient code
 * Identifying, troubleshooting, and resolving complex technical challenges with innovative solutions
 * Ensuring code quality through unit testing, code reviews, and adherence to best engineering practices
 * Collaborating with cross-functional teams to deliver reliable and performant end-to-end solutions
 * (Optional but valued) Applying your C++ knowledge in projects where native integration or performance-critical modules are involved


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