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Principal Data Scientist

Microsoft

$139,900 - $304,200
Oct 3, 2025
Redmond, WA, US
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Help shape how Windows is built and shipped by leading the technical vision and quality systems for Windows-wide experimentation to deliver fast, safe, trustworthy decisions at scale.

Requirements

  • Doctorate in Statistics, Biostatistics, Econometrics, Economics, Quantitative Social Sciences, Data Science, Operations Research, Mathematics, Computer Science, or related field AND 5+ years data-science experience (e.g., managing structured and unstructured data, applying statistical techniques and reporting results)
  • Master's Degree in Statistics, Biostatistics, Econometrics, Economics, Quantitative Social Sciences, Data Science, Operations Research, Mathematics, Computer Science, or related field AND 7+ years data-science experience (e.g., managing structured and unstructured data, applying statistical techniques and reporting results)
  • Bachelor's Degree in Statistics, Biostatistics, Econometrics, Economics, Quantitative Social Sciences, Data Science, Operations Research, Mathematics, Computer Science, or related field AND 10+ years data science experience (e.g., managing structured and unstructured data, applying statistical techniques and reporting results)
  • equivalent experience
  • 2+ years of additional experience applying data science techniques in a business or applied research setting
  • 2 years of the required work experience includes working on or in close partnership with an experimentation platform or other highly scaled Data Science capability.
  • Deep expertise in advanced experimentation methods, such as complex experimental designs, adaptive experiments (e.g., bandits), anytime‑valid approaches, causal inference, and experimentation in multi‑sided marketplaces.

Responsibilities

  • Define and implement clear, practical guidance on experimental design, measurement, and decision frameworks so teams can make faster, higher-quality decisions.
  • Maintain and evolve guardrails, scorecards, and decision mechanisms to deliver trustworthy insights at Windows scale.
  • Lead root-cause investigations and post-mortems when results conflict or regressions appear, and drive fixes into practice.
  • Partner with Windows Experimentation colleagues to improve insight generation while reducing manual work through automation and reusable assets.
  • Create clarity across Windows PM, Engineering, and Data Science teams; land common practices; reduce duplicated effort; improve decision quality.
  • Provide hands-on technical and career mentorship for earlier-career data scientists; lead reviews and learning sessions; and contribute to hiring practices.
  • Share work at academic and industry forums, stay current on advances in experimentation and causal inference, pilot new approaches, and embed successful techniques into practice and the platform.

Other

  • Lead the technical vision and quality systems for Windows‑wide experimentation
  • This role emphasizes technical leadership, ownership, and influence across organizational boundaries.
  • You’ll build durable partnerships and practices with product PM, Engineering, and DS teams across Windows—actively shaping and raising the bar on experimentation culture and decision quality.
  • Demonstrated track record of landing experimentation standards and influencing adoption across multiple teams or organizations, improving decision quality and time‑to‑decision at product scale.
  • Experience collaborating with engineering and product teams to build and scale experimentation platforms and large‑scale measurement systems.