Event-Driven Architecture (EDA) is a software design paradigm in which the flow of the program is determined by events, such as user actions, sensor outputs, or messages from other programs or systems. In an event-driven architecture, events are captured, processed, and then used to trigger specific actions within the system. This approach is particularly well-suited for applications that require real-time processing, responsiveness, and scalability, such as financial trading platforms, IoT systems, and interactive user interfaces.

EDA is built around the concept of decoupling components, meaning that event producers (those generating events) and event consumers (those reacting to events) operate independently. This decoupling enhances system flexibility and allows for easier modification, scaling, and maintenance. Event-driven systems often use message brokers, such as Apache Kafka or RabbitMQ, to manage the distribution of events and ensure reliable communication between components. As modern applications increasingly rely on real-time data and responsiveness, event-driven architecture has gained popularity as an effective way to design systems that can handle high volumes of asynchronous, event-based interactions.