Senior C# Software Engineer ALTEN
Job in
3012 XX, Rotterdam, South Holland, Netherlands
Listed on 2026-07-09
Listing for:
Alten Nederland
Full Time
position Listed on 2026-07-09
Job specializations:
-
Software Development
.NET Developer, Software Engineer, C# / Unity Developer, Backend Developer
Job Description & How to Apply Below
The Position
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.
Responsibilities- 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
- 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)
- Lease car with fuel card
- Possibility of hybrid working
- Monthly net expense allowance
- 27 vacation days, with the option to purchase up to 10 extra vacation days
- Pension scheme with no personal contribution required
- Access to exciting projects in key sectors:
Defence, Transport, Telecom, Finance - A diverse client base:
Collaborations with both large corporations and smaller players across the Netherlands - A real career development plan:
Continuous training, coaching, daily knowledge sharing - An innovative and collaborative environment
Position Requirements
10+ Years
work experience
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