ASP.NET MVC C# /.NET Developer at ypto – Near Brussels Midi Station | Jobyssey

How do you help make a difference?

We are looking for a Medior ASP.NET MVC C# /.NET Developer to strengthen our Web Team’s ongoing digital evolution. With at least 5 years of experience, you have mastered the .NET ecosystem and built scalable, reliable, and user‑centric web platforms.

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

What is your role at SNCB?

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

Web Development: Drive development within our web .NET projects, delivering robust web components and APIs that power modern web applications.

Performance & Reliability: Oversee the evaluation, improvement, and monitoring of frontend and backend performance, ensuring reliability, stability, and maintainability.

API & System Integration: Collaborate closely with UI/UX, 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 web and backend engineering, helping the team adopt new technologies, frameworks, and methodologies.

Communication & Mentorship Share progress, highlight risks, and solve problems proactively. Mentor junior developers and cultivate a collaborative engineering culture.

Why is this job a good fit for you?

Minimum 5 years of hands‑on experience in ASP.NET MVC C# /.NET web development.

Strong command of .NET 6+, .NET Core, ASP.NET MVC, Web API, and RESTful services.

Experience with relational databases (SQL Server, PostgreSQL) and ORM frameworks (EF Core).

Experience with CSS/SCSS, HTML 5.

Experience with CMS platforms is a nice‑to‑have (e.g., Sitecore, Umbraco, Optimizely, EpiServer).

Minimum 1 year of hands-on experience with typescripst / javascript / angular / react

Technical Skills

Solid understanding of application architecture, design patterns, and modern development principles.

Knowledge regarding CI/CD pipelines and expertise using version control (Git).

Strong grasp of performance optimization and troubleshooting techniques.

Ways of Working

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 English is a must and Dutch or French one is desirable.

Additional

Experience providing L2/L3 support in a production environment is a nice-to-have.
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 SNCB/NMBS stronger. We therefore place great value on diversity and inclusion.

What can you expect from us?

Within our open corporate culture, you contribute to the digital transformation of SNCB/NMBS. You will have a job with social impact and ample opportunity to make your own contribution. In addition to a good work-life balance and a competitive salary, you will receive the following benefits:

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 and death (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.

What’s next?

You apply online.

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.

We invite you for a first (online) HR interview where you can demonstrate your motivation, experience and expectations.

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.

If everything goes well, we will make you a contract offer.

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.

Do you have any further questions?

Mail: [email protected]

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