In this AWS re:Invent 2023 session, James Beswick explores the development of Serverlesspresso, an event-driven coffee ordering system built using serverless technologies. He discusses key design decisions, lessons learned, and useful patterns for creating scalable, extensible serverless applications. The presentation covers the use of AWS services like EventBridge, Step Functions, and IoT Core to create a real-time, event-driven architecture that can handle thousands of orders per day. Beswick emphasizes the importance of low-code solutions, cost efficiency, and the benefits of event-driven architectures in building flexible, maintainable systems. The session provides valuable insights for developers looking to leverage serverless technologies in their own projects, showcasing how Serverlesspresso achieves high performance at a cost of about one dollar per day.