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Principal Applied Scientist

Microsoft

$139,900 - $304,200
Oct 18, 2025
Redmond, WA, US
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Large Language Models (LLMs) are fundamentally transforming how we build solutions for our customers. The People Analytics team is focused on developing robust, scalable, and LLM-powered solutions that enable customers to access and understand their data more efficiently.

Requirements

  • Solid engineering background with hands-on experience integrating AI projects into customer solutions.
  • Experience building or evaluating LLM-based or generative AI solutions in production environments
  • Ability to translate ambiguous business problems into measurable ML problems and deliver scalable solutions.
  • Deep understanding of experiment design, model evaluation, and responsible AI principles (fairness, interpretability, bias mitigation).
  • 5+ years experience developing and deploying live production systems, as part of a product team.
  • 3+ years experience developing and deploying products or systems at multiple points in the product cycle from ideation to shipping.
  • 5+ years experience creating publications (e.g., patents, libraries, peer-reviewed academic papers).

Responsibilities

  • Design end-to-end solutions and lead the team in integrating AI capabilities into the product.
  • Serve as a team expert on changes in industry trends, products, and other advances, and apply this knowledge to influence product needs.
  • Review business and product requirements, incorporate engineers and product manager, and provide strategic direction for problem solving.
  • Ensure scientific rigor, support the development of methods, and apply your expertise to support business impact.
  • Document work and experimentation results and share findings to promote innovation.
  • Provide guidance when capturing processes and contribute to ethics and privacy policies related to research processes and data collection.
  • Leverage your expertise to drive innovation and lead efforts to design, develop, and deliver scalable, high-quality solutions powered by LLMs.

Other

  • The position is based in Redmond, WA, USA, and requires working from the office at least three days per week.
  • 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.
  • Embody our culture and values.
  • Effective communication skills—able to explain complex models or research outcomes to technical and non-technical stakeholders.