Senior C++/C# Performance Engineer for RealTime Market Data

United States Digital Space LLC in London is seeking a midlevel to senior IC to join our core engineering team. You will own and evolve our high-performance C# client library while collaborating with the core engineering group on low-latency C++ services.

The role focuses on writing parsers and feed handlers for direct market data, optimizing throughput to multi-million messages per second and building petabyte-scale data tools, with emphasis on reliability, testing, and developer-friendly APIs.