Senior Developer – .NET Core & Blazor

Our client, a leading public sector organization, is seeking a Senior Developer to play a key role in designing, developing, and maintaining robust software solutions. This position focuses on delivering high-quality code and providing technical leadership to ensure the performance and longevity of critical systems.

• Develop and maintain software components using .NET Framework and .NET Core.
• Design scalable technical solutions in collaboration with the architecture team.
• Provide technical coaching and mentorship to team members to foster excellence.
• Conduct code reviews and ensure compliance with development best practices.
• Translate functional requirements into technical solutions alongside business analysts.
• Optimize system performance while ensuring security and maintainability.
• Evaluate and integrate new technologies aligned with business objectives.

• You have 8+ years of development experience with .NET Core and .NET Framework.
• You bring 8+ years of experience working with Agile methodologies.
• You possess 3+ years of experience with Blazor and Entity Framework.
• You have 3+ years of experience working with REST APIs and SQL.
• You bring 3+ years of experience in security and identity management using JWT, OIDC, and claims.
• You possess 3+ years of expertise in unit testing and integration testing.
• You have 1+ years of experience utilizing GitHub Copilot.
• You're proactive with strong technical leadership, analytical thinking, and a solution-oriented mindset.
• You are fluent in French or Dutch with a professional command of English.

Nice to Haves

• Willingness to explore and integrate emerging Microsoft technologies.

• Start date: November 2, 2026.
• Duration: 2 months.
• Work regime: Full-time.
• Location: Brussels.
• Working model: Hybrid (minimum 2 days onsite per week).
• Contract: open to both permanent employees and freelancers.