Medior C# /.NET Developer

ypto; Brussel Hoofdstad; Sur place; EUR 55 000 - 75 000; Plein temps

Avantages offerts par ce poste

Possibility to work remotely

35 days of leave

Company car

Comprehensive insurance package

Meal vouchers

Résumé du poste

Ypto is seeking a C#/.NET Developer to contribute to backend development and API integration, ensuring high-quality technical implementation. This role involves leadership in backend services and continuous improvement in development practices. Candidates should have 3 to 5 years of experience in C#/.NET development, with strong knowledge of relevant technologies.

The position offers remote working and flexible hours, along with competitive benefits including 35 days of leave, insurance packages, and a company car. Join us in the digital transformation of the Belgian railways.

Qualifications

• 3 to 5 years of hands-on experience in C#/.NET backend development.
• Strong command of .NET 6+, .NET Core, and RESTful services.
• Strong grasp of performance optimization and troubleshooting techniques.

Responsabilités

• Contribute to the development of .NET applications with reliable backend services and APIs.
• Monitor and improve backend performance for reliability and stability.
• Collaborate with teams for real-time data flows across systems.

Connaissances

C#/.NET backend development

API integration

Agile methodologies

Database management (SQL Server)

CI/CD pipelines

L2/L3 support

Communication in Dutch or French + English

Outils

.NET 6+

Git

CMS platforms (Sitecore, Umbraco, Optimizely)

Description du poste

How do you help make a difference?

Your first expertise in backend development, API integration, and modern engineering practices will help us accelerate our web initiatives and deliver high-quality, seamless digital experiences. Additional experience with content management systems (CMS) is a strong plus.

What is your role at Ypto?

As a C#/.NET Developer you will take on the following responsibilities:

• Backend Development Leadership: Contribute to the development of our .NET applications by delivering reliable backend services and APIs, and collaborate with the team to ensure high‑quality technical implementation.
• Performance & Reliability: Help monitor and improve backend performance by identifying issues, suggesting optimizations, and implementing improvements to support reliability and stability.
• API & System Integration: Collaborate closely with frontend, architecture, and integration teams to deliver smooth, real‑time data flows across systems.
• Technical Implementation Excellence: Translate technical requirements into clean, efficient, and scalable code, while helping define coding standards and best practices for the team.
• Testing & Quality Assurance: Ensure high quality through automated testing, code reviews, and continuous integration practices. Support the team in building secure and maintainable solutions.
• Continuous Improvement: Stay ahead of the latest trends in .NET and backend engineering, helping the team adopt new technologies, frameworks, and methodologies.
• Communication & Mentorship Communicate clearly with team members, share progress and risks proactively, and participate in code reviews and knowledge sharing to support a collaborative team culture.

You have 3 to 5 years of hands‑on experience in C# /.NET backend development

Technical Skills

• You have strong command of .NET 6+, .NET Core, Web API, and RESTful services
• You have experience with relational databases (SQL Server) and ORM frameworks (EF Core)
• You have additional experience with CMS platforms (e.g., Sitecore, Umbraco, Optimizely) – nice‑to‑have
• You have solid understanding of application architecture, design patterns, and modern development principles
• You have hands‑on experience with CI/CD pipelines and version control (Git)
• You have strong grasp of performance optimization and troubleshooting techniques
• You have experience providing L2/L3 support in a production environment

Soft Skills

• Solid grounding in Agile methodologies and iterative delivery
• Ability to collaborate with cross‑functional teams and contribute to a positive, learning‑focused team culture
• Strong multitasking abilities and adaptability to dynamic work environments

Communication

• Excellent communication skills, capable of explaining complex topics clearly
• Proficiency in Dutch or French + English is required

Additional

• This role may require flexible availability outside of working hours at specific points in time (such as system go‑lives)

Everyone is unique. That's why we believe it's important that you can be yourself — it makes Ypto/SNCB stronger. We therefore place great value on diversity and inclusion.

What can you expect from us?

Choosing Ypto/SNCB means contributing to the digital transformation of the Belgian railways. You will have a job with social impact and ample opportunity to make your own contribution. Alongside a healthy work‑life balance and a competitive salary, we offer:

• the possibility to work remotely + flexible working hours;
• 35 days of leave;
• a company car + a public transport season ticket;
• a target bonus;
• a comprehensive insurance package (affiliation without own contribution, excl. outpatient costs for family members);
  • hospitalisation and dental care for the whole family;
  • outpatient costs (medical costs separate from hospitalisation);
  • group insurance: supplementary pension, work disability (cafeteria plan);
  • accidents at work (extralegal);
• meal vouchers and eco‑vouchers;
• net allowances for remote working and carwash + internet budget.

Where will you be working?

You will work near Brussels‑South station and join the Commercial Channels & Products team.

What’s next?

1. You apply online.
2. We take a close look at your CV and check whether it matches the profile you are looking for. We may call you briefly to ask about your motivation and experience.
3. We invite you for a first (online) HR interview where you can demonstrate your motivation, experience, and expectations.
4. If the first interview is positive, we invite you for a second technical interview in Brussels. This interview will be with the team, where we’ll discuss the role and how your skills align with the team’s needs.
5. If everything goes well, we will make you a contract offer.
6. You start your new job!

We reserve the right to adjust or pause this procedure if necessary. Our recruitment team will select the profiles that best match the job requirements to ensure an optimal fit.