- What We Do
- Markets & Trading
- Quantitative Research
- Open Opportunities
- News & Insights
A Place to Take Ownership
Our engineers work in small teams, partnering with researchers and traders to solve complex problems at scale. Our teams move quickly from idea to implementation, and the markets deliver swift feedback.About Our Engineering Team
Design and deliver elegant software solutions that achieve high performance and reliability.
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.
Early Careers Technology Program
Whether you want to lead people or lead through outstanding code, we’ll provide you with the training, tools and support to help you progress in your career.
Develop a strong, trusted network across the firm through events with peers and leaders.
Hone your technical skills, knowledge of our systems and financial expertise through both structured learning and project-based apprenticeship.
Tackle the most interesting, critical tech problems with guidance from expert colleagues.
Identify the technical specialty and career path that is right for you – whether that’s managing a team or owning an aspect of our tech, with clear frameworks, exposure and dialogue to guide decisions.
Answers For Applicants
Engineers from our team answer some of our candidates’ most frequently asked questions.
Confidence and a commercial mindset
Being able to operate confidently in a fast, dynamic environment is necessary. You should feel comfortable making decisions, assessing risk and trusting your intuition as you design systems.
Quick learning and comfort with ambiguity
You must possess the ability to learn quickly and be comfortable operating in unfamiliar situations. You are building solutions for problems we identify in real time. There is often no playbook, so constant learning and adaptability are key. We want candidates who are excited by the fact that it is often those moments with the least definition that yield the most innovation.
Problem solving and ownership
You will face challenging, exciting and sometimes ambiguous problems. Being a motivated problem solver is critical. You’ll be able to tap into the best tools and resources available, including bright teammates who want to see you succeed.
We encourage initiative. People who take responsibility and accountability for projects grow the fastest.
Excellence is a baseline—you need to be an amazing engineer. But you don’t need to be an expert in many specific program languages on Day One; we’ll teach you. We want talented engineers who want to learn, master new skills and continue to raise the bar together.
Driving the Business Forward
Practically speaking, we sit with the business to understand their needs and work with quant researchers to spec out systematic and semi-systematic trading algorithms. We then build out these trading engines from the ground up.
Our work equips teams within the organization and helps Citadel Securities meet the needs of clients and counterparties like retail brokers and banks. It’s exciting to be part of a team that drives benefits for retail and institutional investors around the world and global financial markets overall.
Engineers wear a variety of hats depending on their team or specialty. All software engineers play important roles in driving the firm’s performance.
Our process is simple: we start with a goal and build technology to achieve it. For example:
- Building products that connect to exchanges to support a variety of trading approaches
- Developing systems to help to consume and assign meaning to market data in real time
- Creating tools that help prepare for market events and model the impact of specific scenarios
- Building trading engines that connect buyers and sellers, allowing them to send orders and receive executions. This keeps markets free flowing for all participants.
Our work drives proactive, big ideas that have an outsized impact. The opportunity to convert thoughtful ideas from theory into real-world applications is both challenging and exciting.
For example, we recently proposed a framework that could turn our research models into high-performance, production-ready components. The management team empowered us to deliver on this solution in a fully dedicated fashion for a year, delivering significant impact to the firm’s bottom line.
- What We Do