The article provides a comprehensive guide on creating and managing a monorepo using Gradle, a flexible build tool widely used for Java and Android applications, which supports multiple languages. It explains the process of setting up a monorepo project directory, creating and developing subprojects, and managing dependencies within a monorepo structure. The tutorial illustrates how subprojects can be organized and how dependencies among them are configured, showcasing Gradle's efficiency in handling complex project dependencies and build processes. Additionally, the article highlights the benefits of using Earthly to enhance build efficiency by optimizing build steps and leveraging caching mechanisms, which is especially useful in large monorepo projects. The example used involves an imaginary e-commerce company, demonstrating the real-world application of these concepts.