C++ Software Engineer

About the role

Citadel Securities is seeking a C++ Software Engineer who is passionate about performance and enjoys solving complex technical challenges in a fast‑moving trading environment where nanoseconds matter.

Key responsibilities

• Break down intricate challenges and deliver clear, elegant solutions that drive real‑world outcomes.
• Design, build, and maintain high‑performance systems that form the backbone of the trading infrastructure.
• Continuously push the limits of latency, reliability, and throughput in a distributed environment.
• Collaborate directly with traders, researchers, and fellow engineers to move ideas into production.
• Own code in production, monitoring, supporting, and improving it daily.

Required profile

• Deep experience in C++ with a focus on clean, performant code.
• Strong grasp of multithreading, concurrency, and distributed systems.
• Curiosity to explore how things work and a drive to improve them.
• Clear communication and ability to thrive in a high‑ownership environment.
• Bachelor’s (or higher) degree in Computer Science, Engineering, or a related field.
• Background in trading or finance is a plus but not required.

Required skills

• C++
• Multithreading
• Concurrency
• Distributed systems

What we offer

• Opportunity to work in global offices including Gurugram, Hong Kong, London, Miami, New York, Shanghai, Singapore, Sydney, and Zurich.
• Comprehensive relocation support for candidates moving to an eligible city.