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OpenAI UK Ltd.

Researcher, Training - London

OpenAI UK Ltd.
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hybrid Full time £170K – £445K London, UK

First indexed 5 Jun 2026

Description

This is a position with OpenAI UK Ltd., which controls the hiring and management of this position. Total compensation includes competitive salary, generous equity and benefits.

Private medical insurance covering 100% of premiums for employees and their dependents

Pension plan with 4% employer contribution

52 weeks maternity leave and 20 weeks parental leave

Unlimited time off

Annual learning & development stipend (£1,200 per year)

As a member of the training team, you will push the frontier of LLM development for OpenAI's flagship models, enhancing intelligence, efficiency, and adding new capabilities.

Relevant interests may include areas such as architecture design, long-context and efficient attention, optimization and the science of scaling.

Ideal candidates have a deep understanding of LLM architectures, a sophisticated understanding of model inference, and a hands-on empirical approach.

A good fit for this role will be equally happy coming up with a creative breakthrough, investing in strengthening a baseline, designing an eval, debugging a thorny regression, or tracking down a bottleneck.

This role is based in London. We use a hybrid work model of 3 days in the office per week and offer relocation assistance to new employees.

Design, prototype and scale up new architectures to improve model intelligence

Execute and analyze experiments autonomously and collaboratively

Study, debug, and optimize both model performance and computational performance

Contribute to training and inference infrastructure

Have experience landing contributions to major LLM training runs

Can thoroughly evaluate and improve deep learning architectures in a self-directed fashion

Are motivated by safely deploying LLMs in the real world

Are well-versed in the state of the art transformer modifications for efficiency

This listing is enriched and indexed by YubHub. To apply, use the employer's original posting: https://jobs.ashbyhq.com/openai/6fdc9e35-c9d9-49fb-a8f7-80d2d7f03968