CareerPlan

Senior .NET Developer

Brussels, beFull-time2026-10-08 → 2026-11-10
Freelance / independent contractor

Core

Senior .NET developer responsible for hands-on development, architecture improvement, and modernization of complex legacy internal platforms.

Role type

Senior IC .NET developer (technical leadership)

Builds

Large-scale internal business-critical application landscape

Domain

Enterprise software development, legacy modernization

Required skills

C#, .NET Framework, .NET 6/7/8, ASP.NET MVC, SQL Server, REST APIs, systems integration, legacy environment navigation, modernization and migration

Preferred skills

Azure, IIS hosting, WCF, workflow/integration platforms, ETL processes, performance optimization, secure software development

Technologies

.NET, C#, SQL Server, ASP.NET MVC, REST, Azure, IIS, WCF

Responsibilities

Hands-on development within .NET environment, analyze and improve existing architecture, reduce technical debt and lead refactoring, identify and resolve performance and security issues, advise on technical decisions and modernization, design future-proof solutions, challenge and guide technical stakeholders

Seniority

Senior, hands-on IC with architectural background