Learn Kotlin 2025
Master Kotlin with Modern Architecture, Coroutines, KMP, Compose, and Professional Backend
This 2025 edition of Learn Kotlin is the complete and updated guide for professionals and students who want to master the Kotlin language with technical depth and practical focus. Expanding and fully refining the content of the previous edition, this manual introduces a new modular structure with optimized chapters, clear explanations, and direct application of concepts in multiple professional contexts.
You will learn to program in Kotlin from scratch to an advanced level, gaining real mastery of its modern applications-mobile, backend, multiplatform, and reactive systems. The book covers everything from language fundamentals to strategic topics such as Kotlin Multiplatform (KMP), Jetpack Compose, coroutines, REST API integration, persistence with Room, automated testing, library publishing, and backend development with Ktor.
Includes:
Full development environment setup with IntelliJ and Android StudioBasic syntax, functions, collections, object-oriented programming, and functional programmingConcurrency and parallelism with coroutines, async, await, withContext, and DispatchersREST API consumption and publishing with Retrofit, Ktor, and JWT authenticationPersistence with SQLite and Room, data modeling, and advanced queriesUnit and integration testing with JUnit 5, MockK, and validation strategiesCode sharing across Android, iOS, and backend with KMP and expect/actualBuilding modern interfaces with Jetpack Compose and reactive navigationKotlin project publishing to Maven Central with Dokka and professional versioningScalable architecture, code standards, design patterns, and industry best practicesBy the end, you will be fully prepared to work professionally with Kotlin in any scenario-mobile, backend, distributed systems, multiplatform, and modern projects based on coroutines, reactive architecture, and real integration with cutting-edge tools.
kotlin, kotlin multiplatform, android development, coroutines, ktor, compose, rest api, room, modern architecture, functional programming, automated testing, maven publishing, dokka, kotlin backend, advanced kotlin.