We are looking for a freelance Full Stack Developer who is not afraid of legacy code for our client in the insurance industry. You will be working in a challenging environment where you will regularly come into contact with slightly older .NET technologies and integrations to the Mainframe. Your responsibilitiesMaintaining and further developing existing applications in C# .NETBeing able to work with legacy .NET and older frameworksBuilding and maintaining integrations to the MainframeDeveloping and optimizing WinForms and WPF applicationsWorking independently within a team, with a focus on quality and stability ProfileExperienced in C# .NET and legacy .NET techniquesKnowledge of WinForms and WPF is importantExperience with integrations to Mainframe is a strong assetIndependent, analytical, and solution-orientedDutch language skills are a big plusAzure 204 certification is ideal, but certainly not a requirement Practical detailsOn-site presence on Mondays and Thursdays (2 days per week)Location: Antwerp