Senior Developer / Tech Lead (.NET / Azure) - Freelance (M/F/D)
Brussels, Brussels, be, Belgium Full-time
We are looking for an experienced freelance Senior Developer / Tech Lead. You will work on challenging projects with the latest technologies and play a key role in developing and optimising software products.
Your missions :
- Set the technical bar: safeguard code quality, perform code reviews and coach developers
- Translate business and domain questions into clear technical analyses and specifications
- Contribute to the development of a scalable business platform on .NET and Azure
- Work AI-native: agents write, test and refactor code, and you safeguard the architecture, security and quality of what they produce
Must-have knowledge and experience :
- Azure: experience with Azure services and cloud-based infrastructures
- .NET: in-depth knowledge and experience developing applications
- DevOps, Kubernetes & Docker: CI/CD pipelines, containerisation and implementing a DevOps culture
- Angular: front-end development
- AI coding tools: experience with tools such as Claude Code and GitHub Copilot on real projects, and the ability to critically assess their output
- Tech lead: code reviews, technical coaching and technical analysis
- Fluency in DUTCH & ENGLISH
Nice to have :
- Marten (event sourcing and document-oriented data in .NET)
- GraphQL (API design and optimisation)
- PostgreSQL (document databases and SQL)
- RabbitMQ & MassTransit (message-based systems, event-driven architecture)
- Domain-Driven Design (DDD)
- Elasticsearch (search and data analysis)
- Certifications: AZ-204 and AZ-400 are a plus
Your profile :
- Problem-solving mindset: you solve complex problems quickly and efficiently
- Resilient: you handle chaos and pressure without losing focus
- Proactive: you anticipate and suggest improvements
- Curious: passionate about technology and always learning
- Team player: you collaborate well with other developers, can work independently, and enjoy sharing knowledge to raise the team’s technical level
All our positions are open to both women and men and are, of course, open to people with disabilities.