{"id":3905195,"url":"https://alion.io/job/citadel-securities-quantitative-researcher-post-doctoral-intern-us","title":"Quantitative Researcher - Post-Doctoral Intern (US)","company":{"id":58498,"name":"Citadel Securities","domain":"citadelsecurities.com","url":"https://alion.io/company/citadel-securities","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"intern","employment_type":"internship","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"explicit","locations":["Miami, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":234000,"max":301600,"currency":"USD","period":"year","gross":null,"usd_annual":301600},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"C++","optional":false},{"name":"Machine Learning","optional":false},{"name":"NLP","optional":false},{"name":"Python","optional":false},{"name":"Time Series","optional":false}],"status":"closed","first_seen_at":"2026-11-06T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-11-08T10:10:00Z","board_verified":false,"closed_at":"2026-11-08T10:10:00Z","days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"Job Description\nAt 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.\nAs 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.\nOur 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.\nYour Objectives\n Conceptualize valuation strategies, develop and continuously improve upon mathematical models, and help translate algorithms into code \n Back test and implement trading models and signals in a live trading environment \n Use unconventional data sources to drive innovation \n Conduct research and statistical analysis to build and refine monetization systems for trading signals\n\nYour Skills & Talents\n Post-Doctoral degree in mathematics, statistics, physics, computer science, or another highly quantitative field \n Strong knowledge of probability and statistics (e.g., machine learning, time-series analysis, pattern recognition, NLP)\n Prior experience working in a data driven research environment\n Experience with translating mathematical models and algorithms into code (Python, R or C++)\n Independent research experience\n Ability to manage multiple tasks and thrive in a fast-paced team environment\n Excellent analytical skills, with strong attention to detail\n Strong written and verbal communication skills\n\nFor our privacy policy, go to https://www.citadelsecurities.com/privacy/\nIn accordance with applicable law, the base salary range for this role is $4,500 to $5,800 per week. \nAbout Citadel Securities\nCitadel 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. 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