Engineering

Our engineers are deeply integrated in our strategies and drive our competitive edge.

Why Citadel?

Our engineers play a vital part in every strategy we pursue. Working in close-knit teams, they define and solve problems as part of our business.

Commercial Impact

Our engineers are embedded in teams alongside quantitative researchers and investment professionals, finding commercial solutions to key business problems.

Rapid Feedback

Our ideas and innovations go into production quickly. An efficient feedback loop across the team encourages rapid iteration, experimentation and creative problem-solving.

Greater Ownership

Working on small teams, our engineers have greater ownership of their work and their results. Good ideas are supported and great performance is rewarded.

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Resources for Peak Performance

Our engineers are empowered with the resources they need to deliver solutions.

We work in a range of transferable programming languages and leverage modern technology stacks.
Our engineers thrive in an environment of collaboration and debate, working directly with traders, quantitative researchers and other engineers to get to the best possible outcomes.
We focus on high-impact problems aligned to commercial goals, ensuring that the work continues to be challenging and engaging.

Building the Systems That Build Our Edge

Engineers at Citadel tackle some of the most challenging problems in finance, from designing our core platforms and infrastructure to building sophisticated risk management tools to scaling platforms that distribute billions of market data values in real time.

Research and Modeling

Data and analytics reveal what others can’t see. Our engineers build frameworks that power research and quantitative modeling across the firm.

Alpha Generation

An idea is only as great as its implementation. Working with quantitative researchers and portfolio managers, engineers create tools to unlock value.

Trading

Engineers architect and implement solutions that connect us to markets around the world, allowing orders to flow wherever opportunity awaits.

Visualization

Our team uses modern web technologies, such as TypeScript and React, to build sophisticated, interactive front-end systems that make performance and risk information understandable in real time.

Risk Management

Our firm earns trust through smart investing and prudent risk management at scale. Engineers work with risk professionals to develop tools for simulating and analyzing hundreds of scenarios.

Core Platforms & Infrastructure

Engineers design and optimize the foundational technologies that underpin what we do. Using industry-standard tools, our team delivers high performance at scale—both on premise and in the cloud.

Driving Impact, Delivering Value

Hear our Chief Technology Officer, Umesh Subramanian, share his perspective on the critical role of engineers and our culture of continual learning.

Hear From Umesh

4:14

Key Engineering Roles

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Software Engineer

Design, develop, test and deploy software solutions that optimize performance and efficiency.

Quantitative Developer

Partner with quantitative researchers to create and implement research tools and trading systems that leverage cutting-edge statistical techniques and technologies.

User Interface Engineer

Leverage advanced JavaScript knowledge and visualization skills to build scalable and performant web applications.

Site Reliability Engineer

Combine software and systems engineering to build and run large-scale, distributed and resilient systems. We focus on practices that drive iterative improvement to our solutions.

View Engineering Roles

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Transition to Finance with NXT

High-performing software engineers and quantitative developers from Big Tech, finance or other industries can focus on solving high-impact problems with resources designed to help accelerate careers. Two to five years of commercial experience is preferred.

Discover the NXT Network

Accelerate Your Early Career

For our newest engineer graduates, we spend two years developing talent through real-world practical application, along with dedicated learning and development opportunities.

Onboarding

We start by building finance fundamentals—unpacking the markets, our investment products and the lifecycle of a trade. Mentorship, networking and expert-led sessions are key components of this critical period.

Ongoing Learning and Development

Over the next two years, our engineers learn on the desk, focusing on critical problem-solving and deployment. Workshops advance their technical and financial knowledge as well as their soft skills, giving them the greatest opportunity to have impact on the firm.

Fostering Engineering Excellence

Hear our colleagues talk about their experiences at Citadel.

“We can take initiative, innovate and make progress.”

Extraordinary Colleagues: Anita

1:49

Anita’s ability to adapt to change was quickly recognized as a strength. Her contributions and the impact she made were rewarded with new challenges. She’s now leading her third team in as many years, with only runway ahead.

“People believed in me and pushed me to a level I never anticipated.”

Extraordinary Colleagues: Daniel

2:06

Daniel joined the team to build proprietary infrastructure and analytics that are critical to our Fixed Income and Macro strategy. With drive and discipline, he pushed himself to learn, stretch his talents and grow.