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Quantitative Researcher - PhD Intern (Europe)

London, United Kingdom
2026-10-03

Role Description

London, Zurich **Personal Information** First Name Last Name **Preferred Name** Email Phone Number Current or Most Recent Employer × Attach a Resume (.docx,.doc,.pdf,.txt - max 10MB file size). Choose A File **Education History** College / University / School × Degree - Select-AssociateBachelorsCertificateDiplomaDoctoratePost-DoctorateMastersJ.D.M.D.LL.M.Other- Select- * Associate * Bachelors * Certificate * Diploma * Doctorate * Post-Doctorate * Masters * J.D. * M.D. * LL.M. * Other Major - Select-Computer ScienceEngineeringMathematicsPhysicsEconomicsFinanceBusinessStatisticsOther- Select- * Computer Science * Engineering * Mathematics * Physics * Economics * Finance * Business * Statistics * Other GPA GPA Scale -Select -4.05.00-100-Select - * 4.0 * 5.0 * 0-100 Start Date Graduation Date X Add Education **Additional Questions** Which is your preferred office location? Choose one: London Zurich Select all other office locations you are willing to work from: London Zurich If you completed an internship this summer, please indicate whether you received a return offer: Yes No Are you in any late stage processes with competing companies, including offer stage? Yes No Add Competing Process Do you now, or will you in the future, need sponsorship from an employer to obtain, extend, or renew your authorization to work in the country this job is posted in? -- Select --YesNo -- Select -- * Yes * No Our Signature Internship Program Takes Place June Through August. Occasionally, We Can Be Flexible To Other Times Of The Year. Please Indicate Your Preferences Below June - AugustSeptember - DecemberJanuary - April Do you have family members that are currently employed at Citadel or Citadel Securities? -- Select --YesNo -- Select -- * Yes * No Please provide your undergraduate GPA. Please select any additional roles you would be open to being considered for. Machine Learning ResearcherQuantitative DeveloperSoftware EngineerTraderFundamental Analyst Please indicate if you are open to considering any international locations. MiamiNew YorkHong KongSingaporeSydney What is your anticipated graduation target date? We understand this may change, so please provide your best estimate. [MM/YYYY] Please share any relevant links that showcase your academic or technical work (e.g., GitHub, Google Scholar, LinkedIn, personal website). X Add Link Please select your top two preferred coding languages for interviews: Preference 1 -- Select --C++PythonJavaJavaScriptTypeScript-- Select -- * C++ * Python * Java * JavaScript * TypeScript Preference 2 -- Select --C++PythonJavaJavaScriptTypeScript-- Select -- * C++ * Python * Java * JavaScript * TypeScript Citadel is an equal opportunity employer. The company prohibits discrimination in employment and advancement opportunities on the basis of race, religious creed, color, national origin, citizenship status, ancestry, disability, medical condition, genetic information, marital status, sex, gender, gender identity, gender expression, age, sexual orientation, or military or veteran status, or any other legally protected status or characteristic under applicable federal, state, provincial, or local law. It also prohibits unlawful discrimination based on the perception that anyone has any of those characteristics, or is associated with a person who has or is perceived as having any of those characteristics. For Massachusetts applicants: it is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability. Checking your Browser… Verifying... Stuck? Troubleshoot Success! Verification failed Troubleshoot Verification expired Refresh Verification expired Refresh Troubleshoot Cloudflare, opens in a new tab 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. As an intern, you’ll dive into research through an 11 week program that will allow you to collaborate and connect with senior team members. In addition, you’ll get the opportunity to network and socialize with peers throughout the internship. Our signature internship program takes place June through August. Occasionally, we can be flexible to other times of the year. You will be able to indicate your timing preference in the application. **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 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 may be available from time to time in any location in which the business is based for suitable candidates. If you are interested in a career with Citadel Securities, please share your details and we will contact you if there is a vacancy available. **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 in 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. Start Application

Quantitative Researcher - PhD Intern (Europe)

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