Senior .NET Developer – Brussels (Hybrid)

Location: Brussels (2–3 days onsite, rest remote)

Start date: 13 October 2025

Citizenship: EU only

Languages: English (C2) + Dutch (C1) or French (C1)

Application deadline: 29 September 2025 (EOB)

We are looking for a Senior .NET Developer to join Belgian Railways within the Transport Execution Management domain. You will design and build high-quality, well-tested software solutions in close collaboration with solution designers and business stakeholders.

This is a role for an experienced professional who can take full ownership, communicate clearly, and combine independence with teamwork. Professionalism, initiative, and constructive collaboration are key to success.

Mandatory requirements

• 5+ years of .NET development experience
• 3+ years of Azure Cloud development
• 3+ years of .NET Core Web API development
• Strong expertise in unit testing
• Available minimum 2 days/week onsite in Brussels
• Fluent English (C2) + Dutch or French (C1)

Preferred skills

• Mastery of the .NET ecosystem (LINQ, async/await, security practices, data structures & patterns)
• Strong coding standards: clean, maintainable, and SOLID code
• Web API design & development with .NET Core
• Azure services, PaaS, and event-driven architectures
• CI/CD pipelines with Azure DevOps, Kubernetes, Docker
• SQL & relational database design and optimization
• Git & version control (branching strategies, collaboration best practices)
• Excellent communication and teamwork skills