Explore Pinterest's highly customizable object retrieval system, RealPin, in this 21-minute conference talk by Bo Liu. Dive into the intricacies of RealPin's architecture, including its definition of objects, methods for updating object features, and organization strategies. Learn about the two primary retrieval patterns and how objects are stored in RocksDB. Discover the system's customization capabilities, implementation details, and how custom logic can be integrated. Gain insights from real-world use cases, lessons learned during development, and future plans for RealPin. Enhance your understanding of large-scale object retrieval systems and their applications in social media platforms.