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Machine Learning Performance Engineer

  • Company: Janestreet
  • Location: London, UK, UK
  • Salary: Pay not listed
  • Full Time
  • Company site
  • Pay not listed

Janestreet at a glance

janestreet.com
  • Founded 2013

Machine Learning Performance Engineer at Janestreet in London, UK, UK

Position Summary

We are seeking a skilled engineer with experience in low-level systems programming and optimization to join our dynamic Machine Learning team. At Jane Street, machine learning is a critical component of our global business operations. Our ever-evolving trading environment provides a unique platform for rapid ML experimentation, minimizing friction as we incorporate new ideas.

Key Responsibilities

  • Optimize the performance of our models, including both training and inference processes.
  • Focus on efficient large-scale training, low-latency real-time inference, and high-throughput research environments.
  • Improve CUDA performance while adopting a whole-systems approach that includes storage systems, networking, and host- and GPU-level considerations.
  • Evaluate the efficiency of our platform at all levels to ensure optimal throughput and minimize latency issues.

Requirements

  • A strong understanding of modern ML techniques and toolsets.
  • Experience in debugging performance end-to-end during training runs.
  • Low-level GPU knowledge, including PTX, SASS, warps, cooperative groups, and more.

About the Company

Jane Street is a leading financial services firm that values curiosity and problem-solving. Many of our team members come from non-finance backgrounds but share a passion for tackling interesting challenges. Our unique environment fosters innovation and continuous learning.

Next Steps

If you're excited about this opportunity, we'd love to hear from you! There's no fixed set of skills, just a curious mind and a desire to solve complex problems. To apply, complete your application directly on this page, or you'll be redirected to the employer's application platform to finish submitting there.

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What people say about Janestreet

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Working in London, UK, UK

Weather right now in London, UK, UK: checking… · Local time: · Air quality: · Daylight: · UV index: · Wind: · Pollen:

London, UK is the capital and largest city of England and the United Kingdom, with a population of 9.1 million people in 2024. Its wider metropolitan area is the largest in Western Europe, with a population of 15.4 million. London, UK stands on the River Thames in southeast England, at the head of a 50-mile (80 km) tidal estuary down to the North Sea, and has been a major settlement for nearly 2,000 years. Its ancient core and financial centre, the City of London, UK, was founded by the Romans as Londinium and has retained its medieval boundaries. The City of Westminster, to the west of the City of London, UK

England is a country that is part of the United Kingdom. It is located on the island of Great Britain, of which it covers about 62%, and more than 100 smaller adjacent islands. England shares a land border with Scotland to the north and another land border with Wales to the west, and is surrounded by the North Sea to the east, the English Channel to the south, the Celtic Sea to the south-west, and

  • Elevation 18m (59 ft)

Source: Wikipedia (state)

Job details above are provided by the employer/source. The sections on this page are compiled from public data sources with AI assistance.

Accommodations: if you need a workplace accommodation to apply for or perform this job, see ADA.gov or EEOC.gov for guidance on your rights and how to request one.

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Listing facts

  • Role Machine Learning Performance Engineer
  • Employer Janestreet
  • Location London, UK, UK
  • Type Full Time
  • Pay (from listing) Pay not listed
  • Posted August 2, 2026
  • Apply by September 1, 2026
  • Overview Full job description on this page (248 words)

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janestreet.com

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Machine Learning Performance Engineer Janestreet · London, UK