Engineering

Our engineers build the tools and distributed systems that keep our business nimble and responsive to global trading activity.

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Why Citadel Securities?

Engineering is key to our competitive advantage. Our engineers are commercial thinkers, identifying and pursuing projects with critical business value.

Exceptional Teams

Our engineers work in small, specialized teams made up of the world’s most rigorous analytical minds. You’ll be challenged and inspired to pursue winning solutions.

Visible Impact

We move efficiently from idea to implementation. With rapid market feedback, you can quickly see the commercial impact of your work.

Accelerated Growth

With a flat structure and minimal bureaucracy comes the opportunity to move and grow faster. Success can earn you greater responsibility and recognition.

Resources for Peak Performance

Our engineers benefit from an environment that empowers them to perform at the top of their game.

We work in transferable programming languages that avoid proprietary lock-in.
Our engineers work directly with traders and quantitative researchers to get to the best possible outcomes–no cutting corners.
We focus on high-impact problems aligned to commercial goals, so our work continues to be challenging and engaging.

Harnessing

Scale and Speed

Our engineers build integrated systems that power trading globally, ensuring we’re always in the market. With the firm as the team’s primary customer, engineers can move faster and retain control over solutions.

Trading Systems

Engineers build distributed trading systems to support the execution of half a trillion dollars in trades a day. This requires maintaining reliable, near-real time operation at scale. These include exchange-facing systems and risk management systems.

Research & Data

Cutting-edge analytics and simulation are the backbone of our business. Engineers confront challenges in scope and efficiency, empowering simulations across tens of thousands of compute cores.

Core Platforms

From lightning-fast messaging to state-of-the-art web UIs, our platforms equip business-aligned teams to elevate their development speed to unprecedented levels.

Site Reliability Engineering

Managing a global and diverse production trading environment requires sharp orchestration and robust monitoring. Our engineering teams deliver that edge.

Early Career Focus

Our training starts at the desk but goes well beyond it. While applying languages and learning systems, our newest team members also delve deep into our business.

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Immersive Onboarding

The first three weeks kick off with foundational skills-building, including technical tools and language application, systems training and market fundamentals.

Experienced engineers, traders and researchers mentor our newest team members to accelerate their learning curve.

Owning Your Growth

Our engineers are more than technical wizards. Core leadership, communication and management skills are integrated from day one, so our engineers know how to manage feedback, maximize their impact and own their careers.

Cohort Connectivity

Community with the cohort is part of the early career experience.

Networking events throughout the year help our newest team members stay connected while also hearing from senior leaders at the firm.

Annual Offsite

Engineers look forward to our annual retreat, where they’re introduced to industry trends, business insights and the most exciting tech challenges the firm is addressing.

Opportunities for Students

Get a jump on your career in Engineering at one of our programs designed for students.

Events

Datathons

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Events

Terminal

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Roles and Responsibilities

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Software Engineer

Design and deliver elegant software solutions that achieve high performance and reliability.

Quantitative Developer

Partner with quantitative researchers to create solutions that help us conduct deep research and craft trading strategies.

User Interface Engineer

Solve some of the toughest challenges in web UI performance, working directly with your users to design intuitive experiences.

Site Reliability Engineer

Build and run distributed, resilient systems designed to help us achieve the next level of scale.

FPGA Engineer

Deploy next-generation FPGA solutions that help optimize trading system performance.

Hear from Our Colleagues

Dmitry loves the markets. His willingness to approach seemingly impossible feats as opportunities makes him a culture carrier and leader. His contributions propelled his rise from individual contributor to Head of Options Technology within four years.