**Overview**

The Microsoft Content team powers AI-driven experiences for more than 1B users across Copilot, Bing, Edge, Windows, and Xbox. We are seeking a Principal Applied Scientist to define and develop the next generation of intelligent, large-scale content platforms.

In this role you will be responsible for modeling, experimentation, product impact, and technical leadership. The ideal candidate will have deep expertise in large language models, information retrieval, ranking, grounding, search systems, and agentic AI. They will work on improving how AI systems retrieve information, reason over context, maintain multi-turn conversations, use tools, rank candidate responses or actions, and produce reliable outputs grounded in trusted data. A hands-on experience tuning and improving models at scale, including techniques such as supervised fine-tuning, preference optimization, model distillation, data curation, evaluation design, and large-scale experimentation will ...