Citadel Securities

Quantitative Researcher - 2025 PhD Graduate (Europe)

Posted 12 Days Ago

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London, Greater London, England

Entry level

Information Technology • Software • Financial Services

We embrace bold ideas and seize opportunities others don’t, from the way we operate to the strategies we deploy.

The Role

As a Quantitative Researcher, you will develop and enhance mathematical models for trading strategies, back test and implement these models, utilize unconventional data sources for innovation, and conduct statistical analysis for monetization systems.

Summary Generated by Built In

Job Description
At Citadel Securities, a leading global market maker, our team of quantitative researchers models the markets and brings trading strategies to life every day. Specifically, this team develops and tests automated quant trading strategies using sophisticated statistical techniques. You'll get to challenge the impossible in quantitative research by applying sophisticated and complex statistical techniques to financial markets, some of the most complex data sets in the world.
Your Objectives

Conceptualize valuation strategies, develop, and continuously improve upon mathematical models and help translate algorithms into code
Back test and implement trading models and signals in a live trading environment
Use unconventional data sources to drive innovation
Conduct research and statistical analysis to build and refine monetization systems for trading signals

Your Skills & Talents

PhD degree in Mathematics, Statistics, Physics, Computer Science, or another highly quantitative field
Strong knowledge of probability and statistics (e.g., machine learning, time-series analysis, pattern recognition, NLP)
Prior experience working in a data driven research environment
Experience with NoSQL databases (e.g., MongoDB)
Experience with distributed computing using MapReduce
Experience with translating mathematical models and algorithms into code (Python, R or C++)
Independent research experience
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

Opportunities available in London.
About Citadel Securities
Citadel Securities is the next-generation capital markets firm and a leading global market maker. We provide institutional and retail investors with the liquidity they need to trade a broad array of equity and fixed income products in any market condition. The brightest minds in finance, science and technology use powerful, advanced analytics to solve the market's most critical challenges, turning big ideas into real-world outcomes.

Top Skills

C++

Python

What the Team is Saying

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The Company

HQ: Miami, FL

1,900 Employees

On-site Workplace

Year Founded: 2002

What We Do

Citadel Securities is the next-generation capital markets firm. Our work is powered by the deepest integration of financial, mathematical and engineering expertise. Combining deep trading acumen with cutting-edge analytics and technology, we at Citadel Securities deliver critical liquidity to the world’s most important financial institutions—while helping shape the global markets of tomorrow.

Why Work With Us

We do not accept the status quo and we are constantly looking to achieve what others think is impossible. That’s true not just in our careers, but also in our communities.