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Principal Applied Scientist

Microsoft

$139,900 - $304,200
Sep 20, 2025
Redmond, WA, US
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Microsoft is looking to deliver innovation in Microsoft Copilot by experimenting with fine-tuning models, building end-to-end AI First SaaS product scenarios, enabling enterprise productivity, and ensuring enterprise security and governance capabilities for AI.

Requirements

  • 5+ years of experience developing and deploying AI/ML products or systems at multiple points in the product cycle from ideation to shipping.
  • 2+ years experience with transformer-based models (e.g., GPT, Llama).
  • 1+Experience coding and hands-on experience working with foundation models, including prompt optimization, advanced RAG, model optimization and adaptation.
  • 1+Ability to apply research, preferring the large-scale application of new ideas over theory and prototypes.
  • Proficiency in Python for data science workflows, leveraging libraries such as NumPy, Pandas, scikit-learn, Matplotlib, and Jupyter for data analysis, experimentation, and rapid prototyping
  • Exposure to Deep Neural Network training and inference and experience in one or more deep learning frameworks (PyTorch, TensorFlow, etc.).
  • Experience with Agent based architectures, frameworks and technologies (such as MCP, A2A protocol, Langchain, Azure AI Foundry)

Responsibilities

  • Experiment with fine-tune models, to build end-to-end AI First SaaS product scenarios enabling enterprise productivity and taking actions while ensuring enterprise security and governance capabilities for AI.
  • Alignments with stakeholders, working together to build and fine-tune models, developing advanced RAG techniques, to coming up with ways to build custom generative AI architectures for specific product needs.
  • Reviewing business and product requirements, incorporating research, and providing strategic direction for problem solving, and depending on situation also hands-on prototyping applied science development techniques to create or develop novel applications of AI in products.
  • Ensuring scientific rigor, supporting the development of methods, and applying your experience to support business impact.
  • Designing system architecture that meets security, compliance, and scalability requirements.
  • Leading implementation and deployment of solutions, ensuring they meet quality standards.
  • Translating project vision into actionable milestones and guiding the team in project estimation and planning.

Other

  • We are looking for candidates who are creative, self-driven, curious, people-oriented and comfortable defining a path through uncertain towards Different goals.
  • Collaborating with stakeholders to gather and understand user requirements and expectations.
  • Seeking and incorporating continuous feedback from users and stakeholders to iteratively improve designs and solutions.
  • Documenting work and experimentation results (offline experimentation as well as in production online experimentation) and share findings to promote innovation.
  • Providing guidance when capturing processes and contributing to ethics and privacy policies related to research processes and data collection.