Senior .NET Full-Stack Developer Job ID: JP054777

Senior .NET Full-Stack Developer

We are looking for an experienced Senior .NET Full-Stack Developer to design, develop, and maintain high-quality software solutions built on Microsoft technologies. You will play a key technical leadership role, ensuring code quality, application performance, and long-term maintainability while mentoring other developers and collaborating closely with architects and business analysts.

Key Responsibilities

• Design, develop, and maintain applications using .NET Framework and .NET Core/.NET 10.
• Build scalable, secure, and maintainable software solutions in collaboration with the architecture team.
• Lead technical discussions and mentor junior developers.
• Conduct code reviews and promote development best practices.
• Translate business and functional requirements into technical solutions.
• Ensure application quality, performance, security, and reliability.
• Optimize system performance and troubleshoot complex technical issues.
• Evaluate and integrate new technologies aligned with business objectives.

Required Skills & Experience

• Expert-level experience with:
  • C# / .NET (Core, .NET 10)
  • ASP.NET Web API
  • Entity Framework Core
  • ASP.NET MVC
• Strong knowledge of:
  • REST APIs
  • Swagger/OpenAPI
  • SQL Server
  • Unit and Integration Testing
  • Authentication & Authorization (JWT, OIDC, Claims)
• Experience with Blazor is an advantage.
• Strong understanding of software architecture, secure coding practices, and application performance optimization.
• Excellent analytical, problem-solving, and technical leadership skills.

Languages

• Fluent in French or Dutch (C2 level).
• Good command of English (C1 level).

Work Arrangement

• Hybrid role with at least 2 days per week onsite in Brussels.
• Teleworking is permitted within Belgium.
• Flexible 40-hour workweek with modern working facilities and professional development opportunities.