Full Stack Engineer

Fullstack Developer — C#/.NETLocation: 90% Remote / 10% Frankfurt am MainStart: 01 September 2026Duration: 4 months — until 31 December 2026Engagement: FreelancerLocation: Germany or EU with German addressLanguage: GermanWe are looking for a Fullstack Developer – C#/.NET to work on the further development of a web-based application supporting operations, maintenance and quality management.Key ResponsibilitiesDevelop and maintain frontend and backend componentsImplement new functional requirementsDevelop analysis, evaluation and visualisation functionsIntegrate additional data sourcesImprove performance, stability and scalabilityAutomate data processing and analysisEnsure data quality and traceabilityPerform testing, deployment and application operationsTroubleshoot technical issuesSupport architecture and technical design decisionsMust-Have Skills5+ years C# / ASP.NET Core Web API5+ years Entity Framework Core and Dependency Injection5+ years Angular, TypeScript and RxJSAngular MaterialCSS/SCSS and Responsive Designng2-Charts5+ years Microsoft SQL Server / database modelling3+ references in web-based application developmentNice to HaveRail transport / maintenance domain experienceNetwork-related incident visualisationASP.NET, C#, Entity Framework, SQL Server and Angular across larger projectsScrum / Agile experience or Certified Scrum Master