Quantitative Trader – Intern (US) (Trading and Research)

About Citadel Securities

Citadel Securities is a technology-driven, next-generation global market maker. We provide institutional and retail investors with world-class liquidity, competitive pricing, and seamless front-to-back execution across a broad array of financial products. Our teams of engineers, traders, and researchers harness leading-edge quantitative research and the accelerating power of compute, machine learning, and AI to power our analytics and tackle the market’s and our clients’ most critical challenges. Together, we are forging the future of capital markets. For more information, visit citadelsecurities.com.

Internship Overview

At Citadel Securities, our quantitative traders make complex risk decisions, model markets, and bring trading strategies to life every day. Working alongside our traders and researchers, you will use predictive analytics and sophisticated statistical techniques to monitor risk, respond to market signals, and develop trading strategies across Options, ETFs, Equities, Fixed Income, Commodities, and Currencies.

This is a single application for our summer trading and quantitative research program. The internship includes education taught by traders and researchers, including asset class fundamentals, research techniques and case studies, mock trading, and game theory challenges. You will collaborate with senior team members throughout the summer, and you will present your work and receive formal feedback at the midpoint and at the end of the program.

Objectives

• Complete two rotations with different teams over the summer, building exposure across distinct areas of the business ahead of full-time placement.
• Own a defined project in each rotation, supported by a dedicated project manager and mentors on the desk to guide your work and professional development.
• Present your results and receive formal feedback at the midpoint and at the end of the program.
• Develop in-depth knowledge of a financial market.
• Sharpen decision-making under uncertainty through structured mock trading and game theory sessions run by the education team.
• Innovate by using one of the industry's most powerful trading platforms.
• Conceptualize valuation strategies and develop and continuously improve mathematical models.
• Design, build, and implement predictive models to generate novel trading signals.
• Use unconventional data sources to drive innovation.
• Conduct research and statistical analysis to build and refine monetization systems for trading signals.

Required Qualifications

• Bachelor's degree in applied math, engineering, statistical modeling, calculus, computer science, physics, or related disciplines.
• Ability to think about the world systematically and quantitatively, and to deal with uncertainty using a rigorous, statistical approach.
• Expertise in translating mathematical models and algorithms into code (Python, R, or C++).
• Ability to manage multiple tasks and thrive in a fast-paced team environment.
• Excellent analytical skills with strong attention to detail.
• Strong written and verbal communication skills.

Desired Qualifications

• Experience with modern AI concepts such as Large Language Models (LLMs) and agentic systems.

Location

• Opportunities available in Miami and New York.

Compensation

In addition to weekly pay, interns may be eligible for a highly competitive sign-on bonus, housing stipend or covered living accommodations, company-sponsored travel, and a variety of on-site benefits, including access to on-site fitness and wellness amenities, catered meals, and social and networking events.

In accordance with applicable law, the base salary range for this role is $4,500 to $5,800 per week.