Senior Quant Developer – High-Performance C++ Trading

Citadel Securities is seeking Research Engineers to design, build, and optimize our electronic trading platform in London. You will work with researchers, simulation, and live traders to develop core-trading infrastructure and high-throughput systems, taking ownership from inception to deployment.

You will apply low-level optimization, algorithmic trading concepts, data analysis, and risk-aware development in a fast-paced environment, contributing to pricing libraries and trading backends.

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