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Senior Applied Scientist

United Kingdom, London, London💼 Full-time🗓 2026-09-16 → 2026-09-25

Core

Research and evaluate tools, technologies, and methods to improve the quality, performance, and efficiency of M365 Copilot Chat and Search, applying state-of-the-art algorithms and statistical analysis to deliver business impact.

Role type

Senior Applied Scientist (Search & NLP)

Builds

M365 Copilot Chat and Search service

Domain

Enterprise productivity software, Search, Natural Language Processing (NLP), Applied Machine Learning

Deliverable

production ML models | product features

Required skills

Machine learning, NLP, Information retrieval, Statistical analysis, Python, PyTorch, Dense/vector retrieval, Text embeddings, Transformer model fine-tuning, Large-scale training and evaluation, A/B test interpretation, Domain adaptation, Parameter-efficient fine-tuning

Preferred skills

Authoring research papers, Developing internal tools and services

Technologies

Python, PyTorch, Cloud/GPU clusters

Responsibilities

Mine data to identify opportunities for search quality improvements, Apply statistical analysis to map user journeys and evaluate deployed models, Consult with engineers and product teams on advanced concepts, Adapt or create research-backed solutions to improve search quality

Seniority

Senior, hands-on IC

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