Senior .NET Developer & Lead

Our client is looking for an experienced Senior Developer / Tech Lead to contribute to the development and optimization of a modern software platform. In this role, you will combine hands-on development with technical leadership, helping shape architecture, safeguard quality, and translate business needs into robust technical solutions.
Responsibilities
Set the technical standard by ensuring code quality, leading reviews, and coaching developers on technical topics.
Translate business and domain needs into clear technical analyses and specifications.
Contribute to the development of a scalable business platform built on .NET and Azure.
Work in an AI-native environment where agents assist with writing, testing, and refactoring code, while you oversee architecture, security, and delivery quality.
Support the team with technical guidance and help raise the overall engineering maturity of the project.
Technical Skills
Strong experience with Azure services and cloud-based infrastructure.
Deep knowledge of .NET and application development.
Experience with DevOps practices, CI/CD pipelines, containerization, Kubernetes, and Docker.
Frontend development experience with Angular.
Practical experience using AI coding tools such as Claude Code and GitHub Copilot in real projects, with the ability to critically assess their output.
Experience in a technical lead capacity, including code reviews, technical coaching, and technical analysis.
Nice to have:
Marten for event sourcing and document-oriented data management in .NET.
GraphQL for API design and optimization.
PostgreSQL, including document-oriented usage and SQL.
RabbitMQ and MassTransit for message-based systems and event-driven architecture.
Domain-Driven Design for building scalable, well-structured applications.
Elasticsearch for search functionality and data analysis.
AZ-204 and AZ-400 certifications.
Profile
You are a strong problem solver who can handle complexity efficiently.
You remain effective under pressure and can work well in fast-moving or challenging situations.
You are proactive, think ahead, and bring improvement ideas forward.
You have a genuine interest in technology and continue to grow your expertise.
You are a team player who collaborates well, works independently when needed, and enjoys sharing knowledge.
Practical Information
Location: Brussels, with telework available
Languages: French, Dutch, and English.
Contactperson & Reference
Reference #: INW28545
Marilyn Weytens
marilyn.weytens@i4m.be

Work arrangement
Yes