JOB DETAILS

Senior .NET | WPF Developer - Energy Sector - Brussels - Freelance / CDI

Companyact digital
LocationBrussels
Work ModeOn Site
PostedJanuary 14, 2026
About The Company
act digital is a global digital transformation consulting group. We have more than 5.000 employees worldwide, with offices in Brazil, the United States, Canada, France, Portugal, Germany, Poland, Spain, Belgium, Luxembourg, Morocco and Serbia. We support the world's largest groups across the entire digital product development lifecycle: from digital design to growth and scaling strategies, through software engineering, architecture definition, data engineering and data science solutions. We focus on accelerating the digital transformation of global leaders in their industry. Our group has experienced annual growth of more than 30% for 10 years.
About the Role

Company Description

Our client is a major player in the European energy landscape and contributes to the reliability and sustainability of electricity supply across multiple countries. You will join a mission-critical environment focused on building a sustainable, green, and future‑proof energy infrastructure.

Working alongside internal teams and other external specialists, you will actively support projects that drive the energy transition. The company fosters diversity and inclusion, convinced that varied perspectives enhance innovation, creativity, and performance.

Job Description

We are looking for one Senior .NET Developer to strengthen established software development teams and support ongoing initiatives. The consultant will participate in delivering high‑quality applications following the company’s development standards.

Responsibilities

  • Deliver high‑quality .NET applications aligned with internal guidelines
  • Contribute to design discussions and propose improvements
  • Ensure maintainability, reliability, and performance of the developed solutions
  • Collaborate effectively with cross‑functional teams
  • Take ownership of assigned tasks and communicate proactively with stakeholders

Qualifications

Required Technical Skills

  • Strong experience with .NET 8
  • Advanced proficiency in Entity Framework Core
  • Strong experience with WPF
  • Good knowledge of SQL Server
  • Experience with MongoDB
  • Experience with RabbitMQ
  • Knowledge of microservices architecture is a plus

Soft Skills

  • Excellent communication skills
  • Strong sense of ownership and accountability
  • Team‑oriented with a collaborative mindset

Languages

The candidate must meet one of the following combinations:

  • French with passive understanding of Dutch (Flemish), or
  • Dutch (Flemish) with passive understanding of French
    In addition: very good knowledge of English

Additional Information

Additional Information

  • Candidates must have a valid work and residence permit for Belgium (if non-EU)
  • The client values diversity and inclusion, offering a positive work culture focused on well-being
  • Opportunity to contribute to innovative, ground-breaking technologies in the energy sector
Key Skills
Dotnet 8Entity Framework CoreWPFSQL ServerMongoDBRabbitMQMicroservices ArchitectureCommunication SkillsOwnershipAccountabilityTeam-orientedCollaborative Mindset
Categories
TechnologySoftwareEnergyEnvironmental & Sustainability
Job Information
📋Core Responsibilities
The consultant will deliver high-quality .NET applications aligned with internal guidelines and contribute to design discussions. They will ensure the maintainability, reliability, and performance of developed solutions while collaborating with cross-functional teams.
📋Job Type
full time
📊Experience Level
5-10
💼Company Size
5224
📊Visa Sponsorship
No
💼Language
English
🏢Working Hours
40 hours
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