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[Freelance Senior .NET Developer / Tech Lead]

location_onBrussels
labelFreelancer
access_timeFulltime
location_onBrussels
labelFreelancer
access_timeFulltime

Looking for a challenging project as a freelance .NET Developer? Itenium connects you with projects that fit your expertise and preferences, so you can focus on delivering quality while we take care of the right opportunity.

What you will do

  • Set the technical bar by guarding code quality, running reviews and coaching developers
  • Build and evolve a scalable, event-driven business platform on .NET and Azure
  • Translate business and domain questions into clear technical analyses and specifications
  • Work with event sourcing (Marten, PostgreSQL), RabbitMQ/MassTransit, GraphQL and Elasticsearch
  • Develop the Angular frontend alongside the backend services
  • Oversee architecture, security and quality of AI-generated code in an AI-native team

Who we are looking for

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Experience

You are a senior .NET developer / tech lead with Azure and DevOps experience (CI/CD, Docker, Kubernetes) and Angular. You bring demonstrable experience with AI-coding tools (Claude Code, GitHub Copilot) in real projects, plus code reviews, technical coaching and analysis. Marten, GraphQL, PostgreSQL, RabbitMQ & MassTransit, DDD, Elasticsearch and the AZ-204 / AZ-400 certifications are a plus.

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Languages

Fluent in Dutch, with good command of French and English.

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Hybrid work

You work about 2 days a week at the client's office in Brussels, the rest remotely.

What our freelancers say…

Ready to apply?

Excited about this role? We’d love to hear from you!

Jelle Muijzelaar

IT Talent Specialist

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About Itenium

Founded in 2018 by consultants, for consultants, Itenium is driven by the belief that things can always be better (nominated for Trends Gazellen 2025!). From our office in Mechelen, our 50+ consultants support companies across Belgium to build software solutions that truly work.

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Our expertise

.NET, Java, JavaScript (Angular, React), Cloud (Azure, AWS, Kubernetes), DevOps, Product Ownership, Analysis, and Test Automation.

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Our approach

Quality first—with real attention to our people. Our consultants are true experts, above-average senior IT profiles. We invest in personal growth through training and one-on-one coaching. Our motto says it all: “committed to pushing you forward.”

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Apply spontaneously

We’re always on the lookout for talented and passionate individuals to join our team. Don’t see the perfect role listed? Send us your spontaneous application and discover what we can create together!