Principal Data and Applied Scientist

We are looking for a Principal Data and Applied Scientist to join our team! As a member of the Commercial Business & AI (CEAI) Data Science and Applied AI organization at Microsoft, you will help us accelerate the company's own AI transformation. You will have the opportunity to partner directly with the engineering and product management groups responsible for managing the Dynamics 365 applications that power Microsoft's sales, marketing, and support platforms. You will apply advanced analytics, statistical modeling, machine learning and GenAI tools to uncover insights, drive action and deliver innovative solutions for complex business challenges.

This role offers the opportunity to:

• Collaborate across a diverse team of data scientists, engineers, and product managers.

• Deepen your experience in the evolving Artificial Intelligence (AI) and Machine Learning (ML) landscape.

• Drive meaningful impact for thousands of Microsoft sales, marketing and support platform users.

Microsoft's mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Responsibilities

• Partner with senior business, engineering, and product stakeholders to translate ambiguous questions about AI impact into well-scoped scientific problems with clear hypotheses, measurable objectives, and agreed definitions of success.

• Own the scientific and statistical strategy for measuring the business impact of AI, including the causal and experimental frameworks (A/B testing, quasi-experimental designs, counterfactual and uplift methods) used to separate real impact from correlation.

• Define and govern the metric framework that connects AI adoption and usage to downstream business outcomes such as productivity, revenue, retention, and cost, and set the standards for how those metrics are computed, validated, and interpreted across the organization.

• Turn problem formulations into executable plans by selecting or creating the appropriate methods, algorithms, and tooling, and by delivering results that are statistically valid, reproducible, and defensible under executive scrutiny.

• Write robust, reusable, and extensible code and analytical pipelines that make impact measurement repeatable at scale rather than a one-time analysis.

• Develop ML and GenAI models using advanced statistical, machine learning, and LLM techniques, and quantify their incremental value to the business.

• Lead the evaluation of GenAI solutions end to end, designing evaluation methodology, diagnosing quality and performance issues, identifying root causes, and recommending fine-tuning, reinforcement learning, or system-level fixes.

• Communicate findings, tradeoffs, and levels of confidence to senior leadership in clear business language, and influence investment and prioritization decisions based on the evidence.

• Raise the scientific bar across the broader team through design reviews, mentorship, and reusable measurement standards that other data scientists can build on.

• Use AI-powered tools in your daily work to accelerate coding, analysis, experimentation, and reporting.

Bachelor's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 6+ years related experience (e.g., statistics, predictive analytics, research) OR Master's Degree in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 4+ years related experience (e.g., statistics, predictive analytics, research) OR Doctorate in Statistics, Econometrics, Computer Science, Electrical or Computer Engineering, or related field AND 3+ years related experience (e.g., statistics, predictive analytics, research) OR equivalent experience.

Preferred Qualifications

• Experience in Python, PySpark, and SQL and LLMs.

• Experience with ML development platforms such as Azure Machine Learning, Azure AI Foundry + Azure OpenAI.

• Experience in Spark and ability to write/maintain/understand declarative Spark code and to cleanly write and maintain SQL.

• Experience with the operational aspects of Spark such as setting optimal cluster size, executor memory, number of executors etc. and experience in Azure Synapse/Databricks (or similar).

• Experience in ML development platforms such as Azure Machine Learning, Azure AI Foundry + Azure OpenAI.

• 6+ year(s) experience creating publications (e.g., patents, peer-reviewed academic papers).

Microsoft is a global technology company headquartered in Redmond, Washington. Our mission is to empower every person and every organization on the planet to achieve more. We develop, license, and support a wide range of software products, services, and devices that help individuals and businesses realize their full potential.

Our flagship products include the Microsoft 365 productivity cloud, Windows operating system, Azure cloud platform, and Dynamics 365 business applications. We are also a leader in areas such as artificial intelligence, cybersecurity, developer tools, and gaming through Xbox and Game Pass.

With operations in more than 190 countries and over 220,000 employees worldwide, Microsoft is committed to responsible innovation, inclusive economic growth, and sustainability. We work closely with governments, industries, and communities to ensure that technology serves the public good and helps address some of the world’s most pressing challenges.

As we celebrate our 50th anniversary in 2025, we continue to look forward—investing in AI, cloud, and quantum computing to shape the future of work, education, and society at large scale.