Researcher, Training - London

Reposted 13 Days Ago
Be an Early Applicant
London, Greater London, England, GBR
In-Office
Senior level
Artificial Intelligence • Machine Learning • Generative AI
The Role
Develop and scale new LLM architectures, run and analyze training experiments, debug and optimize model and compute performance, and contribute to training and inference infrastructure. Work collaboratively to improve model intelligence, efficiency, and capabilities. Role is hybrid, based in London with relocation assistance.
Summary Generated by Built In
About the Team

OpenAI's Training team is responsible for producing the large language models that power our research, our products, and ultimately bring us closer to AGI. Achieving this goal requires combining deep research into improving our current architecture and optimization techniques, alongside long-term bets aimed at improving the efficiency and capability of future generations of models. We are responsible for integrating these techniques and producing model artifacts used by the rest of the company, and ensuring that these models are world-class in every respect.

About the Role

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.

In this role, you will:
  • 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

You might thrive in this role if you:
  • 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

Workplace & Location:

This role is based in our London office, and we aren’t considering applications to work remotely at this time.

If you're joining us in person, we offer relocation support and follow a hybrid schedule: three days a week in the office, with the option to work from home on Thursdays and Fridays. Our offices are set up for focus and connection—with adjustable desks, phone booths, conference rooms, stocked kitchens, and cozy spots to unwind or catch up with teammates.

About OpenAI

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. We push the boundaries of the capabilities of AI systems and seek to safely deploy them to the world through our products. AI is an extremely powerful tool that must be created with safety and human needs at its core, and to achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. 

We are an equal opportunity employer, and we do not discriminate on the basis of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability, genetic information, or other applicable legally protected characteristic.

For additional information, please see OpenAI’s Affirmative Action and Equal Employment Opportunity Policy Statement.

Background checks for applicants will be administered in accordance with applicable law, and qualified applicants with arrest or conviction records will be considered for employment consistent with those laws, including the San Francisco Fair Chance Ordinance, the Los Angeles County Fair Chance Ordinance for Employers, and the California Fair Chance Act, for US-based candidates. For unincorporated Los Angeles County workers: we reasonably believe that criminal history may have a direct, adverse and negative relationship with the following job duties, potentially resulting in the withdrawal of a conditional offer of employment: protect computer hardware entrusted to you from theft, loss or damage; return all computer hardware in your possession (including the data contained therein) upon termination of employment or end of assignment; and maintain the confidentiality of proprietary, confidential, and non-public information. In addition, job duties require access to secure and protected information technology systems and related data security obligations.

To notify OpenAI that you believe this job posting is non-compliant, please submit a report through this form. No response will be provided to inquiries unrelated to job posting compliance.

We are committed to providing reasonable accommodations to applicants with disabilities, and requests can be made via this link.

OpenAI Global Applicant Privacy Policy

At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

Skills Required

  • Deep understanding of large language model (LLM) architectures
  • Sophisticated understanding of model inference and efficiency
  • Hands-on empirical approach; able to design, run, and analyze experiments autonomously and collaboratively
  • Experience contributing to major LLM training runs
  • Experience designing, prototyping, and scaling new model architectures
  • Experience studying, debugging, and optimizing model and computational performance
  • Contributions to training and inference infrastructure
  • Familiarity with transformer modifications for efficiency and long-context modeling
  • Motivation to safely deploy LLMs in real-world settings

OpenAI Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about OpenAI and has not been reviewed or approved by OpenAI.

  • Parental & Family Support Policies include 24 weeks of paid leave for birth parents and 20 weeks for non‑birth parents, plus fertility and family‑planning coverage. Additional flexibility such as the option to work from home for several weeks after parental leave reinforces family support.
  • Healthcare Strength Health coverage is positioned as competitive and tailored by location, with dedicated mental‑health support and services alongside life and AD&D insurance. Global business‑travel insurance for employees and dependents extends protection beyond core medical care.
  • Equity Value & Accessibility Equity has delivered tangible value through multiple tender offers that have enabled employees to realize liquidity at strong valuations. A shift toward more conventional RSU‑style grants for newer offers makes the equity more familiar for many candidates.

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The Company
HQ: San Francisco, CA
4,500 Employees
Year Founded: 2015

What We Do

OpenAI is an AI research and deployment company dedicated to ensuring that general-purpose artificial intelligence benefits all of humanity. AI is an extremely powerful tool that must be created with safety and human needs at its core. OpenAI is dedicated to putting that alignment of interests first — ahead of profit. To achieve our mission, we must encompass and value the many different perspectives, voices, and experiences that form the full spectrum of humanity. Our investment in diversity, equity, and inclusion is ongoing, executed through a wide range of initiatives, and championed and supported by leadership. At OpenAI, we believe artificial intelligence has the potential to help people solve immense global challenges, and we want the upside of AI to be widely shared. Join us in shaping the future of technology.

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