We are looking for an experienced Senior C# Back-end Developer with 8+ years of hands-on C# development experience. This role is focused on server-side and desktop application development, performance optimization, and code refactoring in a highly technical environment. Key Skills: ✔ C# / .NET Development (8+ years) ✔ Visual Studio ✔ Multithreading & Concurrency ✔ Data Structures & Algorithms ✔ SQL Server ✔ Performance Tuning & Code Optimization ✔ gRPC, nHibernate, WCF ✔ REST APIs & Swagger ✔ WinForms ✔ Code Reviews, Testing, and Refactoring Nice to Have: ➕ Financial Services / Trading Domain Experience ➕ Knowledge of FX, Fixed Income, Rates, or Structured Products ➕ TDD / BDD Methodologies ➕ French Language Skills