This talk dives into the principles and practices of clean architecture and feature modularization in Android app development. Clean architecture emphasizes separation of concerns, maintainability, and testability, while feature modularization promotes scalability, reusability, and team collaboration. Through practical examples and best practices, attendees will learn how to design Android applications with a clear architectural structure, leveraging feature modules to encapsulate functionality and dependencies. By adopting clean architecture and feature modularization, developers can build robust, maintainable, and scalable Android apps that are easier to develop, test, and maintain.