Microsoft★4.2 (9k)· London

You will work with Large Language Models (LLMs), machine learning, deep learning, reasoning systems, retrieval-augmented generation (RAG), tool orchestration, reinforcement learning, and telemetry analysis. The team develops advanced LLM-based capabilities and AI-powered experiences for Microsoft 365 Copilot, an enterprise productivity flagship. You collaborate with a team of scientists, engineers, and product managers.

Microsoft★4.2 (9k)· London

Works with Python, PyTorch and retrieval technologies including ColBERT, SPLADE, dense/sparse hybrid, RAG and LLM-integrated architectures. Builds state-of-the-art retrieval systems for Microsoft 365 Copilot Search, Chat and Agent experiences, serving millions of enterprise users daily.

You'll work with PyTorch or JAX, Python, large GPU clusters, deep learning agents, and retrieval-augmented generation pipelines. As part of Mistral AI's research team, you'll run pre/post-training, build datasets and tools, and deploy text, image, and speech models for enterprise clients. No team size is stated.

You will work with Python, classical ML, statistics, LLMs, and agentic techniques (RAG, LLM-as-judge, multi-agent workflows). The role designs and prototypes AI/ML methods to improve human data quality, judgement aggregation, and AI evaluation workflows for Prolific's human data platform.