**Position Summary...**
As a Principal Data Scientist at Walmart, you will define and execute the data science roadmap for the experimentation platform that powers trusted decision-making across Walmart’s A/B testing ecosystem. This is a hands-on technical leadership role at the intersection of experimentation science, large-scale data systems, and AI evaluation. You will own the scientific direction behind experiment reporting, dashboards, guardrails, and reusable measurement services, ensuring experiment exposure data is stitched to business and operational outcomes with rigor, scalability, and clarity. You will partner closely with engineering, product, and business teams to modernize our statistical tooling, improve self-service experimentation, and extend our measurement framework to emerging AI use cases including LLM evals, prompt evaluation, hybrid human/LLM judging, and offline-to-online quality measurement. We are looking for a self-starter who can move fluidly from strate...