Mastering Kotlin Programming: Build Scalable Apps for Android and Beyond

Learn to build modern, scalable applications with Kotlin, the official language for Android development and a powerful tool for backend systems and multiplatform projects. Mastering Kotlin Programming takes you from absolute beginner to confident developer through a structured, hands-on approach. Whether you are new to programming or transitioning from Java, Python, or JavaScript, this book provides clear explanations, real-world examples, and two complete portfolio-worthy projects. What You Will Learn Start with the fundamentals of Kotlin syntax, variables, functions, and control flow. Master null safety, the feature that eliminates the billion-dollar mistake of NullPointerExceptions. Build expertise in object-oriented programming with classes, interfaces, inheritance, and sealed classes. Apply functional programming techniques using lambdas, higher-order functions, and the collections API. Write asynchronous, non-blocking code with coroutines, Dispatchers, and Flow for reactive state management. Build modern Android applications using Jetpack Compose for declarative UI design. Implement professional architecture patterns including ViewModel, Repository, and Navigation. Connect to REST APIs with Retrofit and manage local data persistence with Room database. Develop scalable backend services using the Ktor framework. Share business logic across platforms with Kotlin Multiplatform. Test your applications with unit tests and UI tests. Deploy Android apps to Google Play Store and backend services using Docker. Two Complete Projects Included RecipeFinder Android App: A multi-screen application with API integration, local database storage, offline functionality, and modern UI with Jetpack Compose. SharedList Full-Stack System: A complete backend API built with Ktor and a multiplatform shared library demonstrating code reuse across Android and other platforms. Who This Book Is For Absolute beginners who want to learn programming from scratch. Developers from other languages looking to master Kotlin. Anyone preparing to build Android applications with modern best practices. Programmers interested in backend development or multiplatform projects. Every concept is explained step-by-step with practical examples and real-world applications. Code samples are production-ready and follow industry standards. You will gain the skills to architect, build, test, and deploy professional Kotlin applications across multiple platforms. Start your journey to becoming a confident Kotlin developer today.