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Senior Applied Scientist

Microsoft • Redmond, WA, US • published 2026-11-06 00:59:38.634900

Description

**Overview** AI assistants are only as good as the information behind their answers. Our team builds the search and grounding technology that finds the right information for each request, across email, documents, meetings, chats and people, and connects AI\-generated answers to the sources that support them. This work sits on the critical path: getting it right improves relevance, limits hallucinations and earns user trust. We work across the full retrieval stack: understanding what a person is really asking, turning everyday, messy requests into precise queries, blending lexical and semantic retrieval, and deciding when enough evidence has been found. Modern language models run throughout, and we fine\-tune them with supervised and reinforcement learning so they find better evidence with less wasted effort. Improvements are measured offline on relevance, accuracy, citation quality and speed, then confirmed in online experiments before they ship. We are looking for a **Senior Applied Scientist** to help drive this work. You will take on hard, open\-ended problems in search and grounding and own them end to end, from framing the problem and building the data through modeling, evalua...

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