.NET WPF Developer - Brussels - Energy Sector - ASAP Start - Freelance / CDI

AlterSolutions

Brussels, Brussels, Belgium permanent

Posted: March 6, 2026

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Quick Summary

We are seeking a Senior .NET WPF Developer to join our team in Brussels, Belgium. The ideal candidate will work on a project that involves building a sustainable, green, and reliable energy infrastructure, with a strong focus on building a diverse and inclusive workforce.

Required Skills

.NET 8 Entity Framework Core WPF SQL Server MongoDB RabbitMQ Microservices architecture Communication skills Accountability English

Job Description

Are you excited to work on a project within a major player in the European energy landscape?

The organisation operates across multiple countries to ensure the reliability and sustainability of electricity supply.

Alongside both contingent workers and internal staff, you will contribute to building a sustainable, green, and reliable energy infrastructure that supports economic growth while reducing ecological impact.

The organisation values diversity and inclusion, believing that a diverse workforce fosters innovation, creativity, and stronger results.

The organisation is seeking one Senior .NET Developer to support ongoing initiatives within existing teams.

Requirements

The developer is expected to follow the organisation’s development standards and deliver high‑quality code.

Technical Skills

Strong knowledge of:

• .NET 8
• Entity Framework Core
• WPF
• SQL Server
• MongoDB
• RabbitMQ

Experience with microservices architecture is a plus.

Soft Skills

• Strong communication skills
• Accountability and ownership

Languages

Candidates should meet one of the following combinations:

• French with passive understanding of Dutch
• Dutch with passive understanding of French
• Very good knowledge of English

• Must hold a valid work permit (if non‑EU)
• Must hold a valid residence permit

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