WinForms Developer – Legacy .NET Application

About the role

We are looking for an experienced WinForms Developer to take full ownership of a business‑critical legacy .NET application. You will join a seasoned team in a large Belgian organization that values quality, autonomy and clear communication.

Key responsibilities

• Analyse the existing WinForms codebase, document architecture, dependencies and technical risks.
• Stabilise, maintain and improve the non‑standard FAT client application.
• Identify technical debt and propose evolution strategies (bug fixes, incremental improvements, refactoring or full rewrite).
• Implement bug fixes, enhancements and new features as required.
• Collaborate with the current developer, ICT teams and business stakeholders to ensure smooth handover and continuity.

Required profile

• Bachelor’s or Master’s degree in IT or equivalent strong experience.
• Senior‑level professional experience with the .NET ecosystem.
• Strong ability to work autonomously, bring structure to complex legacy environments and make well‑founded technical decisions.

Required skills

• .NET Framework
• WinForms / Windows Forms
• Angular (strong asset)

What we offer

• Freelance contract with long‑term renewable yearly extensions (up to 5+ years).
• Stability at a reliable employer and networking opportunities.
• Hybrid work mode – three days remote per week, office located a short walk from the train station.