The eBay App for Google Assistant is a chatbot-powered conversational commerce system that uses knowledge graphs to support natural language understanding. The system was built using Neo4j, a graph database, which powers machine learning on the knowledge graph and enables scalable deployment of the system. To scale with traffic increases, the team used Dockerized systems on top of Google Cloud Platform and Kubernetes, leveraging StatefulSet for persistent data storage. The system uses probabilistic inference to determine the next question to ask in a conversation, allowing it to handle complex queries and provide personalized recommendations. With over 160 million active buyers and $11 billion in mobile sales, the eBay App for Google Assistant is a significant example of conversational commerce and graph-powered AI.