Beware of scams impersonating Citadel Securities. We only communicate through our official accounts. For more information or to share information about fraudulent scams, click here. Who We Are Our Culture Leadership Team Civic Leadership Office Locations What We Do Equities Designated Market Maker Options Fixed Income & FX What is a Market Maker? Corporate Solutions News & Insights In the Media Market Insights Policy Positions Careers Markets & Trading Quantitative Research Engineering Internships Programs & Events Conference Travel Grant Datathons Discover Citadel Securities Citadel Securities Quant Invitational Ignite Women's Trading Program PhD Summit Terminal Trading Invitational Career Perspectives Open Opportunities Positions for Professionals Positions for Students: Internships Full Time Quantitative Researcher Engineer – PhD Intern (Europe) London, Zurich Job Description At Citadel Securities, Quantitative Research Engineers work closely with Quantitative Researchers to develop and implement automated trading system software solutions. These solutions utilize advanced statistical and quantitative techniques to tackle complex financial challenges. We seek candidates with a proven track record of excellence in their field and a strong desire to apply their advanced software engineering skills to systematic investing. As an intern, you’ll get to challenge the impossible in 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 Design, develop, test, and deploy elegant software solutions for automated trading systems Partner with the Quantitative Research team to define priorities and deliver custom software solutions Your Skills & Talents PhD degree in computer science, mathematics, statistics, physics, or another highly quantitative field Strong programming skills with proficiency in one or more programming languages, including C++, Python, and R A deep passion for technology, software development, and mathematics Strong computer science fundamentals and software development experience Experience with some of the following areas: Distributed Computing, Natural Language Processing, Machine Learning, Platform Development, Networking, System Design, and/or Web Development Proven track record of creatively solving problems by understanding and prioritizing business value and applying technology solutions Strong written and verbal communications skills Opportunities available in Zurich and London. 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.