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Principal Applied Scientist

Microsoft

$139,900 - $304,200
Sep 5, 2025
Redmond, WA, USA • Mountain View, CA, USA
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Microsoft Teams is looking to reinvent the way people communicate and work together by integrating AI, specifically leveraging and fine-tuning foundation models for next-generation innovations and experiences within Microsoft CoPilot and other generative AI products.

Requirements

  • 4+ years of experience in software development, preferred hands on experience on developing AI Applications
  • Experience in applied science experiments, create and validate metrics, work with ML pipeline and modeling algorithm in the area of Large Language Models, Natural Language Processing, Information Retrieval, and Machine Learning.
  • Develop and deploy conversational and language understanding models at scale.
  • Following and advancing best practices for Responsible AI and Privacy Preserving Machine Learning.
  • Experience prompt tuning, fine tuning and RAG system development, experience with Evaluation, A/B testing, Experimentation.

Responsibilities

  • Design, implement, validate, and ship AI-powered features end-to-end for Microsoft Teams across desktop, web, and mobile clients.
  • Collaborate with a multi-functional group to deliver next generation innovations and experiences leveraging, fine tuning and prompt engineering foundation models.
  • Partner with product and engineering teams to invent and deliver on the future for Microsoft CoPilot and other generative AI products.
  • Develop and deploy conversational and language understanding models at scale.
  • Following and advancing best practices for Responsible AI and Privacy Preserving Machine Learning.
  • Collaborate closely with Microsoft Research, Microsoft AI groups, Microsoft Azure, AI platform teams, and product teams to create the next generation of AI innovation in our products and services.
  • Experience prompt tuning, fine tuning and RAG system development, experience with Evaluation, A/B testing, Experimentation.

Other

  • Ability to meet Microsoft, customer and/or government security screening requirements are required for this role.
  • Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.
  • Collaborate with Program Managers, Designers, and Researchers to define product requirements, timelines, and measurable success criteria.
  • Champion a culture of scientific rigor, ethical AI, and innovation across the team.
  • Communicate scientific findings and technical designs clearly to product and engineering leadership.