Senior Quant Developer - High-Performance C++ Trading

Citadel Securities; City Of London; On-site; GBP 120,000 - 150,000; Full time

Job summary

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.

Qualifications

• Strong knowledge of C++ and Python.
• Experience with derivatives and pricing library design.
• Bachelor’s or Master’s in CS, Mathematics, Statistics or equivalent.
• Excellent quantitative and analytical abilities.
• Strong written and verbal communication skills.

Responsibilities

• Design, develop, test, and deploy pricing & risk-management libraries for OTC trading.
• Code optimization for high-throughput trading systems.
• Collaborate with the Quantitative Research team to define priorities and deliver custom software solutions.
• Design and develop high-performance C++ components used by trading applications.

Skills

C++

Python

Quantitative skills

Communication

Education

Bachelor’s or Master’s in CS/Math/Stats

Job description

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.