Machine Learning Researcher

MACHINE LEARNING RESEARCHER at Janestreet in London, UK, Full Time, No Remote

Position Summary

We’re seeking smart and curious individuals from industry and academia to join our growing Machine Learning team and drive our cutting-edge work. As a key member of this dynamic group, you will build deep learning models that power our trading strategies, supported by our rapidly expanding computing cluster with tens of thousands of high-end GPUs. Trading presents unique challenges—large models and nonstationary datasets in a competitive multi-agent environment—that force us to explore novel techniques.

Day-to-Day Responsibilities

You will train models for the next generation of deep learning-based trading strategies, contributing to the fundamental understanding we need to tackle new markets and situations. Your role involves working closely with researchers, engineers, and traders who sit just a few feet away from each other. Depending on the day, you might be diving into market data, tuning hyperparameters, debugging distributed training performance, or studying how your models perform in production.

• Build deep learning models for trading strategies
• Work with a rapidly growing computing cluster of tens of thousands of high-end GPUs
• Collaborate closely with researchers, engineers, and traders to train models, architect systems, and run trading strategies
• Explore market data, tune hyperparameters, debug distributed training performance, and study model behavior in production

Qualifications

We are looking for individuals who have a deep understanding of the machine learning landscape and experience with various approaches—drawn from LLMs, image models, RL agents, recommendation systems, or classical ML methods. You should be comfortable working in a fast-paced environment where you will be hiring new colleagues, attending conferences, and teaching techniques to teammates—all of which we consider real and impactful parts of the job.

About Janestreet

At Jane Street, we value curiosity and innovation. Our team is dedicated to pushing the boundaries of machine learning in finance, and we are committed to fostering a collaborative environment where ideas can flourish. Join us if you’re ready for a challenge and eager to contribute to the future of ML in trading.

Ready to Apply?

If you’ve never thought about a career in finance, you’re in good company. Many of us were in the same position. We offer a full-time, on-site role where you can make an impact from day one. To apply, complete your application directly on this page, or you'll be redirected to our employer's application platform to finish submitting there.