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Research Engineer, Pretraining

London, UK💼 Full-time💰 $260,000–$260,000🗓 2026-04-01 → 2026-07-31

Core

Develop next-generation large language models at the intersection of cutting-edge research and practical engineering, focusing on safe, steerable, and trustworthy AI systems.

Role type

Research Engineer (Pretraining)

Builds

Large language models, training infrastructure, and dev tooling

Domain

Artificial Intelligence / Machine Learning

Deliverable

production ML models

Required skills

Python, deep learning frameworks (PyTorch), large-scale machine learning, model architecture design, algorithm development, data processing, optimizer development, distributed training, fault tolerance strategies

Preferred skills

High-performance large-scale ML systems, GPUs, Kubernetes, OS internals, transformer architectures, reinforcement learning, large-scale ETL processes

Technologies

PyTorch, Python, Kubernetes, GPUs

Responsibilities

Conduct research and implement solutions in model architecture, algorithms, data processing, and optimizer development; Independently lead small research projects while collaborating on larger initiatives; Design, run, and analyze scientific experiments to advance understanding of large language models; Optimize and scale training infrastructure to improve efficiency and reliability; Develop and improve dev tooling to enhance team productivity; Contribute to the entire stack from low-level optimizations to high-level model design

Seniority

Senior, hands-on IC

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