Senior Developer (Backend) - C# .NET

Sygnia is an innovative FinTech company based in South Africa and listed on the main board of the JSE. The company provides asset management, stockbroking and administration services, as well as a wide range of savings products, to institutional and retail clients. All that we do is supported by leading-edge technology platforms. Sygnia offers a dynamic, fast-paced, and growth-focused environment that values innovation, accountability, and continuous improvement. Employees are encouraged to be curious, take ownership, and contribute meaningfully to a collaborative and performance-driven culture.

The duties and responsibilities of this position include (but are not limited to):

• Build and evolve backend services on .NET Framework and modern .NET with strong contracts, reliability, and testability.
• WCF (NetTcp): maintain/extend contracts, behaviours, diagnostics, and hosting.
• gRPC: define protobuf contracts; implement servers/clients; use streami...