Sam's Club · Sunnyvale, CA, United States
Skills: React, TypeScript, React Native, Node.js, Java, Kotlin, Swift, SQL, Docker, CI/CD, Accessibility
Position Summary... -----------------------
What you'll do... ---------------------
As a Principal Full-Stack Engineer on the mGPS/Compass team, you will lead the design and delivery of the Java services and web experiences that power Walmart's in-store positioning, mapping, and routing platform. You will set technical direction across backend and front end, with a strong focus on TypeScript and React, and own the quality, reliability, and performance of what we ship. You will mentor engineers and partner with product, vendors, and partner-app teams to turn complex needs into effective technical solutions that serve millions of customers and associates.
About the team: The mGPS/Compass team builds Walmart's in-store positioning, mapping, and routing platform. We help customers, associates, Spark shoppers, and partner apps find items faster, navigate stores with confidence, and complete orders accurately. Our work turns indoor positioning data into meter-level location and real-time routing across thousands of stores, saving millions of hours every year. We own the full stack behind the experience. That includes the blue dot, real-time path generation, and proximity-based actions that guide users to the right item. It also includes store map generation and the item and aisle location data that connects products to places. On the client side, we ship native Android and iOS SDKs and a React Native SDK used across customer, associate, and partner apps. Behind them, our core platform services and multi-tenant capabilities serve Walmart and Sam's Club and extend to new chains and formats. Our data pipelines move events through streaming and batch processing into BigQuery, so we can measure positioning quality and operational impact with privacy and compliance built in. Engineers here work from mobile SDKs and positioning signals through backend services to the analytics that prove the impact, and they see results in stores quickly. We run a multi-cloud environment on Azure a…
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