Medior .NET & Python Developer - Energy Sector - Brussels - ASAP Start - Freelance / CDI

AlterSolutions

Brussels, Brussels, Belgium permanent

Posted: January 29, 2026

Required Skills

Job Description

A medior-level .NET and Python developer is required to support ongoing application development and integration initiatives within a major European energy-sector organization. The consultant will work within existing teams to build and maintain high‑quality solutions, following internal development standards and ensuring robust, maintainable code.

Key Responsibilities

• Develop and maintain backend and full‑stack components using .NET 8 and Python.
• Work with relational and non-relational databases, including SQL Server and MongoDB.
• Implement and maintain asynchronous communication using RabbitMQ.
• Ensure code quality, maintainability, security, and adherence to internal development standards.
• Collaborate with analysts, developers, and operational teams.
• Take ownership of assigned tasks and participate in team ceremonies.

Required Technical Skills

• Strong hands-on experience with .NET 8.
• Proficiency in Python.
• Solid knowledge of SQL Server.
• Experience with MongoDB.
• Experience using RabbitMQ or similar messaging technologies.

Soft Skills

• Strong communication skills.
• Accountability and ownership of deliverables.

Languages

Candidates must be fluent in English and possess one of the following language combinations:

• Fluent French with passive understanding of Flemish, or
• Fluent Flemish with passive understanding of French.

Additional Information

• Work location: Brussels (with up to 3 days/week remote work, depending on activity).
• Costs for occasional travel to Germany will be covered.

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

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