Medior C# /.NET Developer - 12-month contract - BrusselsOne of our important clients is currently looking for a Medior C# /.NET Developer for a 12-month contract based in Brussels. Day rate is negotiable.We are looking for a Medior C# /.NET Developer (5+ years experience) to join our Web Team and support the development of scalable, high-performance web platforms.Key ResponsibilitiesDevelop and maintain backend services and APIs using .NETEnsure performance, reliability, and scalability of applicationsCollaborate with cross-functional teams on system integrationsWrite clean, efficient code following best practicesContribute to testing, CI/CD, and continuous improvementSupport and mentor junior developersRequirements5+ years’ experience in C# /.NET backend developmentStrong knowledge of .NET Core, .NET 6+, Web API, REST servicesExperience with SQL Server and EF CoreFamiliar with CI/CD pipelines and GitUnderstanding of architecture, design patterns, and AgileFluent in English + Dutch or FrenchNice to have: CMS experience (Sitecore, Umbraco, Optimizely)Additional InfoExperience with L2/L3 support is a plusWillingness to be on-call (24/7 standby) for critical incidentsIf you are interested please send me your CV and I will contact you as soon as possible with further details.