Research Engineer, Infrastructure

Overview

Harvey is hiring a Research Engineer for Infrastructure to join the team in London, United Kingdom. This role focuses on scaling the post-training stack to support supervised fine-tuning and reinforcement learning on leading open-weight models for legal work.

Requirements

Candidates should have experience building machine learning infrastructure, distributed systems, or research tooling, taking ownership of performance, reliability, and operations. Strong Python and generalist software engineering skills are required across backend services, data systems, and internal tools, along with familiarity with machine learning frameworks such as PyTorch or JAX. Applicants need experience with distributed training or inference, including diagnosing performance bottlenecks and system failures. Practical judgment and the ability to partner with researchers to ship quickly as needs evolve are also necessary for the position.