Backend Developer (.NET) — Freelance

Full-time for one to two months, starting as soon as you can.You'd be the backend hire on a European product team that needs someone senior enough to land in a running codebase and be useful in week one. There is no ramp-up period on an engagement this short, which is the whole reason we're looking at senior people only.The workBuild and extend backend services in modern .NET and C#Design interfaces across REST, SignalR and Protobuf, and own those decisionsWork directly with the product team, no handover layer in betweenYouYears of production .NET and C# behind you, across more than one kind of systemInterface design owned end to end, not just consumedReal time in shared codebases: reviews, other people's architecture, existing conventionsWorking with AI in your development workflow is a plusSetupFreelance contract with Scope MergeFull-time, one to two monthsRemote from Tunisia