Event-driven design patterns, which have been around since the 1990s, are experiencing a resurgence as companies such as Airbnb, Netflix, and Amazon use them to provide fast, reliable, and secure user experiences. Initially overshadowed by object-oriented methods popularized by the Gang of Four's book "Design Patterns," event-driven patterns gained prominence in the 2000s with the rise of the internet and the need for more resilient web applications. Unlike the traditional request-response model, event-driven architectures allow for asynchronous communication, which ensures that applications remain functional even if one service fails. Common patterns include the publisher/subscriber pattern, which supports asynchronous workflows by decoupling systems, event streaming for real-time data processing, and event sourcing for managing data operations chronologically. These patterns are applied across various industries, such as logistics, IoT, and e-commerce, enabling businesses to improve efficiency and user experience. Despite their benefits, implementing event-driven solutions at scale can be complex, and many organizations choose to partner with experienced third parties to manage this infrastructure.