Quant jobs / Citadel Securities

Quantitative Research Engineer

This Citadel Securities research engineer implements models for extremely latency-sensitive trading. The role links mathematical research with C++ performance engineering and processor-level optimisation.

What you’d work on

Our reading of the posting: what a new hire in this role would most likely spend their first months on.

Implement researchers’ models in trading code.
Profile algorithms against latency constraints.
Improve software using CPU and memory-system knowledge.

What they ask for

Required

Mathematical foundations
Systems programming
C++ expertise
CPU architecture
Performance optimisation

Preferred

Electronic-trading experience
Parallel computing
GPU or TPU programming

Education: No degree requirement is stated.
Experience: Demonstrated performance-engineering experience; no year minimum given.
Languages and tools: C++

How to prepare

Benchmark C++ code with cache-aware data layouts.
Profile latency distributions under realistic load.
Compare mathematically equivalent implementations.

What to study

The HFT Quant Developer roadmap sets out the stages for this kind of role, with free resources for each.

Open the roadmap

Apply

Read the full posting on Citadel Securities’s site before applying: requirements, location and pay can change after we check them.

View the posting on Citadel Securities’s site ↗

SelfMadeQuant wrote this summary from the employer’s public posting, last checked 6 November 2026. SelfMadeQuant isn’t affiliated with Citadel Securities and doesn’t handle applications.