Dotnet Consultant

We are supporting a major Belgian utilities organisation on a range of business-critical digital and system modernisation initiatives. For a long-term programme, we are looking for a strong .NET Fullstack Developer with proven WPF expertise to help evolve and maintain operator-facing and internal platforms.

This role requires someone who is genuinely comfortable building rich desktop applications in WPF, alongside solid backend development in .NET.

Logistics

• Role: Freelance .NET Fullstack Developer (WPF Focus)
• Contract: 12–24 months
• Location: Brussels (Hybrid – 2 days/week on-site)
• Languages: English + French or Dutch
• Start Date: ASAP / Flexible
• Rate: Competitive & negotiable

Responsibilities

• Design, develop, and maintain applications using .NET / C#
• Build and enhance rich desktop solutions using WPF (Windows Presentation Foundation)
• Contribute to both new development and modernisation of existing systems
• Translate complex business and operational requirements into scalable technical solutions
• Develop and maintain backend services and APIs
• Ensure clean architecture, code quality, and maintainability
• Participate in Agile ceremonies, code reviews, and technical discussions
• Collaborate with cross-functional teams to deliver reliable, high-performance solutions

Required Skills

• 5+ years of experience as a .NET Developer
• Strong expertise in C# and the .NET ecosystem
• Proven, hands-on experience with WPF (essential)
• Experience building fullstack solutions (desktop frontend + backend services)
• Solid knowledge of REST APIs and relational databases
• Experience with Git-based workflows and CI/CD environments
• Comfortable working autonomously within Agile/Scrum teams
• Experience on large, business-critical systems

Nice to Have

• Experience in the utilities or energy sector
• Exposure to legacy system modernisation projects
• Knowledge of Azure or cloud environments
• Familiarity with enterprise-scale architecture and performance considerations

If you’re a strong .NET developer with deep WPF experience looking for a long-term freelance engagement within a high-impact utilities' environment, we’d be happy to discuss further.