# Quantitative Research Engineer – PHD Intern (Europe) [Citadel](https://www.jorb.ai/firms/citadel.md) · London · United Kingdom · [Backend](https://www.jorb.ai/jobs/backend.md) Citadel is hiring a Quantitative Research Engineer – PHD Intern (Europe) in London. Posted 2026-07-14; applications close 2026-09-12. **Apply**: https://www.citadel.com/careers/details/quantitative-research-engineer-phd-intern-europe/ Posted 15h ago. ## Role details ## Job Overview At Citadel, 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 advanced software engineering skills to systematic investing. ## Internship Details As an intern, you’ll challenge the impossible in research through an 11-week program that allows you to collaborate and connect with senior team members. You’ll also have opportunities 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 can indicate your timing preference in the application. ## 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. ## 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. - Deep passion for technology, software development, and mathematics. - Strong computer science fundamentals and software development experience. - Experience with one or more areas, such as 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 communication skills. ## Location & Application Opportunities may be available from time to time in any location where the business is based for suitable candidates. If you are interested in a career with Citadel, share your details and we will contact you if there is a vacancy available. ## About Citadel Citadel is one of the world’s leading alternative investment managers. We manage capital on behalf of many of the world’s preeminent private, public and nonprofit institutions. We seek the highest and best use of investor capital in order to deliver market-leading results and contribute to broader economic growth. For over 30 years, Citadel has cultivated a culture of learning and collaboration among some of the most talented and accomplished investment professionals, researchers, and engineers in the world. Colleagues are empowered to test their ideas and develop commercial solutions that accelerate their growth and drive real impact. ## Applying to this role This Quantitative Research Engineer – PHD Intern (Europe) role at Citadel runs through the firm's own careers portal and expects a CV and cover letter written specifically for the posting, not a portable submission carried across firms. Jorb AI's application agent tailors a CV and cover letter from your background to this posting and tracks the role alongside the rest of your applications. [Tailor this application](https://www.jorb.ai/signup?ref=job-atom&firm=citadel&job=6a5581a8c866361475070144) ## More open roles at Citadel - [Quantitative Research Analyst Intern – BS/MS (Europe)](https://www.jorb.ai/jobs/69d5e0926dbbf590185da49c.md) – London, posted 3mo ago - [Quantitative Researcher – PhD Intern (US)](https://www.jorb.ai/jobs/694ef16daa11ce41cf5114b4.md) – New York, posted 6mo ago - [Machine Learning Researcher – PhD Intern (US)](https://www.jorb.ai/jobs/6a197d66e098b223efbf6f2b.md) – New York, posted 1mo ago - [Quantitative Researcher – PhD Intern (Europe)](https://www.jorb.ai/jobs/6a197d66e098b223efbf6f46.md) – London, posted 1mo ago - [Machine Learning Researcher – PhD Intern (Asia)](https://www.jorb.ai/jobs/6a4495e4cba59937ccf607b7.md) – Singapore, posted 13d ago ## Other open Backend roles - [12 Month Internship - C# Developer](https://www.jorb.ai/jobs/6a245fa2c02725b43c8926f5.md) at [Crédit Agricole](https://www.jorb.ai/firms/cr-dit-agricole.md) – London, posted 1mo ago - [12 Month Internship - IT Developer](https://www.jorb.ai/jobs/6a3abb5f253ad42b86144c11.md) at [Crédit Agricole](https://www.jorb.ai/firms/cr-dit-agricole.md) – London, posted 21d ago - [Internship Programme 2027: Software Engineer (Java)](https://www.jorb.ai/jobs/6a2956a39a43d08d0a019315.md) at [Revolut](https://www.jorb.ai/firms/revolut.md) – London, posted 1mo ago - [Internship Programme 2027: Software Engineer (Python)](https://www.jorb.ai/jobs/6a2956a39a43d08d0a0192b3.md) at [Revolut](https://www.jorb.ai/firms/revolut.md) – London, posted 1mo ago - [Software Engineer – Intern (US)](https://www.jorb.ai/jobs/6a4b307f0f633b3e2a5ad735.md) at [Citadel Securities](https://www.jorb.ai/firms/citadel-securities.md) – New York, posted 8d ago --- Updated: 2026-07-14 Canonical: https://www.jorb.ai/jobs/6a5581a8c866361475070144