Novancy is seeking a highly skilled Senior C# ASP.NET Core Developer to join its remote freelance team. The role demands deep expertise in .NET Core 8, Entity Framework Core, PostgreSQL, and unit testing frameworks such as xUnit and Moq. Candidates will architect scalable, high‑performance solutions for the Temporary Work/Payroll domain, leveraging asynchronous programming, generics, and design patterns. Fluency in French is required. This position offers the flexibility of remote work while delivering critical software solutions for Novancy’s clients in information systems and digital transformation.