Technical lead .NET

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Posté : 9 février 2026

Technical lead .NET

Bruxelles

Mission longue

Mars 2026

Selon profil


Located in Lille, Lyon, Nantes, Grenoble, and Brussels, Insitoo Freelances is an entity of Insitoo Group, specialized in Freelances sourcing and supplying.Since 2007, Insitoo Freelances has been a reference in IT thanks to its expertise, transparency, and proximity . We are looking for a Technical Lead .NET for our client in Brussels.

Key responsibilities :

  • Technical Leadership and Coaching: Providing guidance and mentorship to the development team, fostering a culture of technical excellence.

  • End Technical Responsibility of Software Systems within application team: Overseeing all technical aspects within the application team, ensuring that software development and deployment meet organizational standards and goals.

  • Active Development Contribution: Dedicating a significant portion of time to hands-on development work, contributing to coding, feature development, and bug fixes.

  • Preparation of Technical Deliverables: Creating detailed technical documentation for software releases, including infrastructure requests and release documents

  • Requests for Configuration Changes to I&O: Managing configuration change request made to I&O to ensure system stability and performance.

  • System Design: Designing scalable, reliable, and maintainable systems while adhering to architecturalstandards and complementing the overarching architecture in collaboration with the architecture team.

  • Requirements Analysis: Collaborating with analyst to refine requirements and translating them into robust technical solutions.

  • Code Review and Quality Assurance: Ensuring code quality through thorough reviews and implementing stringent quality assurance processes.

  • Performance Optimization: Regularly assessing software performance and making necessary adjustments for optimization.

  • Security Considerations: Incorporating up-to-date security practices to safeguard software systems against threats taking into account architectural decisions.

  • Technology Evaluation and Integration: Assessing and integrating new technologies that align with business objectives and enhance system capabilities taking into account architectural decisions.

  • Troubleshooting and Support: Leading the resolution of complex technical issues, providing expert troubleshooting and support.

  • Adherence to Architecture Standards and Collaboration: Collaborating with the portfolio architect to align with the strategic architecture while retaining the discretion to make complementary design choices.

Expected skills :

  • .NET – Expert

  • ASP .net web API & ASP.Net Core Web API – Expert

  • Azure – Medior

  • Blazor – Medior

  • Patterns and best practices

  • REST API – Medior

  • Security (OWASP/OAUTH/OpenId/…) – Medior

  • SQL – Medior

  • Unit testing

Expected languages :

  • Dutch or French – C2 Level in one of the two

  • B2 Level in the other language

  • English – C1 level

Interested by this opportunity ?

Do you have significant experience as a .NET technical lead ?

Are you rigorous, methodical, organized, and able to demonstrate autonomy and reactivity?
Do you master the technical perimeters mentioned with the adequate levels
Do you enjoy evolving in an environment where autonomy, initiative-taking, sharing, and teamwork drive collective success?
Do you think your profile might match our client’s needs?

Don’t wait any longer to submit your application; our Business Engineers will be happy to tell you more!

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Référence : 03-TECHLEADNET-QO