Senior Dotnet Developer

We are supporting a major utilities partner on several business-critical digital initiatives, including core system modernization and the evolution of customer- and operator-facing platforms. We are looking for an experienced .NET Developer with a strong understanding of Microsoft frontend technologies to join a long-term delivery environment.

Logistics

• Role: Freelance .NET Developer
• 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 backend services using .NET / C#
• Contribute to greenfield development and modernization initiatives
• Translate complex business requirements into scalable technical solutions
• Build and maintain frontend components using Blazor and/or WPF
• Apply clean code practices, testing standards, and collaborative development
• Support modular, maintainable system architectures
• Integrate solutions into CI/CD pipelines and modern deployment environments
• Participate in code reviews, agile ceremonies, and technical discussions
• Collaborate across teams to ensure end-to-end solution quality

Required Skills

• 5+ years of experience as a .NET Developer
• Strong expertise in C# and the .NET ecosystem
• Hands-on experience with Blazor and/or WPF
• Solid knowledge of REST APIs and relational databases
• Experience with CI/CD tooling and Git-based workflows
• Familiarity with Docker and modern deployment practices
• Comfortable working autonomously in Agile/Scrum teams
• Experience on large, business-critical systems

Nice to Have

• Experience in the utilities or energy sector
• Exposure to legacy modernization or migration projects
• Knowledge of Azure or cloud-native environments
• Familiarity with messaging or event-driven architectures
• Awareness of enterprise security and performance considerations

Interested? Get in touch to discuss the role and next steps.