We’re looking for a Freelance .NET Full Stack Developer (Medior) to join one of Belgium’s leading players in the energy sector. You’ll work on impactful projects that strengthen the country’s electricity infrastructure and accelerate the green energy transition.

This is a long-term freelance opportunity within an innovative, international environment.

Logistics

• Position: Freelance .NET Full Stack Developer (Medior)
• Location: Brussels HQ (hybrid - 2x days a week on-site)
• Start Date: ASAP
• Duration: 12-months
• Travel: Occasional travel to Germany (all costs covered)

Core Responsibilities

• Develop and maintain full stack applications using .NET 8, React, SQL Server, MongoDB and related tools.
• Deliver clean, maintainable code aligned with development standards.
• Collaborate closely with the teams and contingent workers to build scalable, reliable systems.
• Contribute to solutions that support Belgium’s energy transition and grid reliability.

Essential Skills

• 3+ years’ hands-on experience with:
• .NET 8 (backend focus)
• React + JavaScript
• SQL Server & MongoDB
• RabbitMQ
• Strong communication, accountability, and teamwork skills.
• Proficiency in French (with Flemish understanding) or Flemish (with French understanding), plus English.

Nice to Have

• Blazor experience
• Python skills

Why Join?

• Be part of Belgium’s energy transition, at the heart of Europe’s power infrastructure.
• Join a diverse, collaborative team that values innovation and inclusion.
• Work on sustainable, future-focused projects with real-world impact.
• Flexible hybrid working model with a strong focus on well-being at work.

Interested? Let’s connect and discuss how you can contribute to this exciting mission!