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ITproposal

Senior .NET Developer Job ID: JP054464

ITproposal
Belgium · Full-time · Not Applicable
About the job Senior .NET Developer Job ID: JP054464Senior .NET Developer

Location: Brussels (Hybrid – minimum 2 days/week on-site)

Languages: French or Dutch (C2 level) and English (C1 level)

Work Model: Hybrid

Overview

We are looking for an experienced Senior .NET Developer to design, develop, and maintain robust Microsoft-based software solutions. You will play a key technical leadership role, ensuring high-quality code, scalable architectures, and reliable application performance while mentoring other developers within the team.

Key Responsibilities

  • Develop and maintain enterprise applications using C#/.NET Framework and .NET Core.
  • Design scalable, secure, and maintainable technical solutions in collaboration with architects.
  • Translate business and functional requirements into technical implementations.
  • Conduct code reviews and promote development best practices.
  • Mentor and coach development team members.
  • Ensure application quality, performance, security, and maintainability.
  • Optimize system performance and troubleshoot complex technical issues.
  • Evaluate and integrate new technologies aligned with business objectives.
  • Participate in unit and integration testing activities.

Required Technical Skills

  • Expert knowledge of C# / .NET (Core and modern .NET versions).
  • Strong experience with ASP.NET Web API.
  • Solid knowledge of Entity Framework Core.
  • Experience with Blazor and MVC frameworks.
  • Strong understanding of REST APIs, Swagger/OpenAPI, and API design.
  • Experience implementing authentication and authorization mechanisms (JWT, OIDC, Claims-based security).
  • Strong SQL Server development and optimization skills.
  • Experience with unit and integration testing frameworks.
  • Familiarity with software architecture, security best practices, and performance optimization.

Soft Skills

  • Strong analytical and problem-solving abilities.
  • Structured and solution-oriented mindset.
  • Technical leadership and mentoring capabilities.
  • Excellent collaboration and communication skills.
  • Adaptability and resilience in changing technical environments.

Ideal Profile

  • Senior-level .NET development experience in complex enterprise environments.
  • Comfortable working across the full software development lifecycle.
  • Able to lead technical discussions and influence architectural decisions.
  • Passionate about code quality, continuous improvement, and knowledge sharing.

Working Conditions

  • Hybrid working model with at least 2 days per week on-site in Brussels.
  • Teleworking permitted within Belgium.
  • Flexible working hours and long-term project environment.
  • Opportunity to work on impactful public-sector digital transformation initiatives.

Key Skills

Ranked by relevance

sql server server sql c
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Country Guide

Belgium

International hub for EU careers

Posted
Jun 14, 2026
Type
Full-time
Level
Not Applicable
Location
Brussels
Company
ITproposal

Industries

IT Services IT Consulting

Categories

Engineering Information Technology

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