Senior Platform R&D Engineer - Recommendation System

Design and develop recommendation system architectures that power multiple products, ensuring stability, high availability, and efficient performance across online services and offline data pipelines. Build reusable recommendation and data middleware platform components, create toolkits and algorithm engineering toolchains to speed experimentation-to-deployment, and implement gray release workflows. Improve observability with end-to-end tracing and issue attribution across complex multi-region environments, and modernize platform ecosystem architectures.