Principal Data Scientist, Experimentation Sciences

. Define the multi-year data science roadmap for experimentation reporting, dashboards, and measurement services.

Posted 4/23/2026full-timeSunnyvale • California • 🇺🇸 United StatesLead💰 $143,000 - $286,000 per yearWebsite

Tools & technologies

AirflowCloudGoogle Cloud PlatformPySparkPythonSparkSQL

Key responsibilities & impact

Define the multi-year data science roadmap for experimentation reporting, dashboards, and measurement services.
Lead the design of scalable statistical frameworks for online experiments across product, business, and operational use cases.
Partner with data engineering to design robust SQL and PySpark data models, pipelines, and observability standards.
Establish and govern canonical experiment metrics, scorecards, and reporting standards across channels, regions, and surfaces.
Define the strategy for AI-native experimentation and evaluation, including LLM eval frameworks, prompt evaluation, and ongoing regression monitoring.
Build lightweight proofs of concept and small automated workflows using tools such as Python, SQL, Airflow, and Google Cloud Platform technologies.

What you’ll need

Bachelor’s degree in Statistics, Economics, Analytics, Mathematics, Computer Science, Information Technology, Operations Research, or related field and 10 years’ experience in data science, experimentation, measurement science, or related field.
OR Master’s degree in one of the above fields and 8 years’ relevant experience.
OR PhD in one of the above fields and 6 years’ relevant experience.
Demonstrate strong hands-on experience with SQL, Spark/PySpark, experimentation, and causal inference at production scale.
Expert-level SQL and PySpark, strong Python skills, and hands-on experience working with high-volume, distributed data pipelines in production environments.
Self-starter mindset, with the ability to work through ambiguity, define a roadmap, and independently drive ideas from concept to execution.

Comp & perks

Health benefits include medical, vision and dental coverage.
Financial benefits include 401(k), stock purchase and company-paid life insurance.
Paid time off benefits include PTO (including sick leave), parental leave, family care leave, bereavement, jury duty, and voting.
Other benefits include short-term and long-term disability, company discounts, Military Leave Pay, adoption and surrogacy expense reimbursement, and more.
Live Better U is a Walmart-paid education benefit program for full-time and part-time associates.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

data scienceexperimentationmeasurement sciencestatistical frameworksSQLPySparkPythoncausal inferencedata pipelinesAI-native experimentation

Soft Skills

self-starterability to work through ambiguityroadmap definitionindependent execution