For a client based in Brussels, we are looking for a senior .NET developer (Employee or freelance) Function: senior .NET developer Understanding the project needs in contact with the end customer Writing the technical documentation Development of new back end and fullstack applications Adding functionality to existing applications Verification of the integration of development Participation in the production and delivery of the application Design and develop API/Web services Work with developers, technical architects and technical analysts to meet functional requirements Profile Bachelor/Master''s degree At least 8 years of experience in .NET and .NET Core Good knowledge of the following technologies: C# .NET et .NETCore SQL React.JS et next.js SharePoint Online et Sharepointframework (SPFx) OpenAPI Swagger Deploiement et integration continu CI/CD GIT Code review IIS Moteur de workflow Workflow Foundation OR K2/nintex Azure DevOps Knowledge of other programming languages is a plus Experience in the media or audiovisual sector is a major asset Good knowledge of Agile methodology Good communication skills Team spirit creative Language: French