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Principal Applied Scientist

Microsoft

$163,000 - $296,400
Aug 1, 2025
Redmond, WA, US
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Microsoft is looking to solve business problems by developing next-generation AI systems at scale, specifically designing and deploying advanced AI models and agentic systems for real-world applications, to empower every person and every organization on the planet to achieve more.

Requirements

  • 3+ years' experience developing and deploying large language models (LLMs), including agentic systems, supervised fine-tuning, and Reinforcement Learning (RLHF)
  • 3+ years' experience designing, implementing, and optimizing Retrieval-Augmented Generation (RAG) pipelines and advanced context engineering.
  • Hands-on experience with modern LLM evaluation techniques, including LLM-as-a-Judge, agentic evaluations, and RAG assessments.
  • Deep understanding of fundamental ML algorithms (supervised, unsupervised) and modern neural network architectures.
  • Experience with MLOps practices, including model versioning, automated testing, monitoring, and CI/CD for machine learning.
  • A record of publication in top-tier scientific venues (e.g., NeurIPS, ICML, ICLR, ACL, EMNLP, KDD).
  • Experience with Large Language Models, Natural Language Processing, Information Retrieval, and Machine Learning.

Responsibilities

  • Lead the design and development of advanced AI models and agentic systems for real-world applications.
  • Own and drive end-to-end model training, including data pipeline design, distributed training optimization, and performance evaluation.
  • Stay up to date with the latest advancements in LLM, NLP, deep learning, search and AI research.
  • Research and develop an understanding of the state-of-the-art tools, technologies, and methods being used in the research community and product groups.
  • Collaborate closely with engineering, product, and research teams to productionize models, build scalable, robust pipelines and provide support for in production AI Models/Agents
  • Lead end-to-end lifecycle of machine learning models, from prototyping and implementation to evaluation, deployment, and monitoring.
  • Conduct applied science experiments, create and validate metrics, develop ML pipeline and modeling algorithm in the area of Large Language Models, Natural Language Processing, Information Retrieval, and Machine Learning.

Other

  • Bachelor's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 8+ years related experience
  • Ability to meet Microsoft, customer and/or government security screening requirements
  • Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.
  • 5+ year(s) experience creating publications (e.g., patents, peer-reviewed academic papers).
  • A track record of delivering successful, large-scale applied ML projects in an industry setting.