eBay is a leading e-commerce platform that connects buyers and sellers from all around the world. It offers a diverse range of products and services, from electronics to fashion, home goods, and more. With millions of active users, eBay provides a global marketplace for businesses of all sizes to sell their products and reach a broader audience. eBay's platform includes features such as bidding, instant purchasing, and seller ratings, which help to ensure a safe and reliable buying experience. eBay is a trusted and established platform that continues to evolve and innovate, providing a comprehensive suite of tools and resources for businesses to succeed in the e-commerce world.

Apache Kafka is a distributed event store and stream-processing platform. It is an open-source system developed by the Apache Software Foundation written in Java and Scala. The project aims to provide a unified, high-throughput, low-latency platform for handling real-time data feeds. Kafka can connect to external systems (for data import/export) via Kafka Connect, and provides the Kafka Streams libraries for stream processing applications.