Resources: Kotlin — Backend Web, Spring Boot, and Android Development¶

Curated, verified resources for learning Kotlin, Spring Boot, and Android development. All URLs verified as of 2026-06-09.

Table of Contents¶

"Kotlin in Action" by Dmitry Jemerov and Svetlana Isakova (Manning, 2^nd edition) The definitive Kotlin reference written by JetBrains engineers. Covers the language exhaustively with excellent explanations of the design decisions. Essential reading. [Verify URL: https://www.manning.com/books/kotlin-in-action-second-edition]
"Effective Kotlin" by Marcin Moskala (Kt. Academy) Goes beyond syntax to best practices: when to use data classes vs regular classes, how to design APIs, performance considerations. Best read after "Kotlin in Action". [Verify URL: https://kt.academy/book/effectivekotlin]

"Spring Boot in Action" by Craig Walls (Manning) A well-regarded introduction to Spring Boot. Examples are Java-based but the concepts transfer directly to Kotlin. [Verify URL: https://www.manning.com/books/spring-boot-in-action]
"Spring Security in Action" by Laurentiu Spilca (Manning) Deep coverage of Spring Security — authentication, authorization, OAuth2, JWT. Covers Module 06 content in depth. [Verify URL: https://www.manning.com/books/spring-security-in-action-second-edition]

"Android Programming: The Big Nerd Ranch Guide" by Bill Phillips et al. (Big Nerd Ranch) Long-standing foundational Android text. Recent editions cover Jetpack Compose. [Verify URL: https://www.bignerdranch.com/books/android-programming-the-big-nerd-ranch-guide-5th-edition/]

Kotlin Documentation — https://kotlinlang.org/docs/home.html The official reference. Unusually readable — written by JetBrains engineers who also wrote "Kotlin in Action". Covers language, coroutines, stdlib, and Kotlin Multiplatform.
Spring Boot Reference Documentation — https://docs.spring.io/spring-boot/docs/current/reference/html/ Comprehensive; use it as a reference alongside learning. The "Getting Started" guides are excellent.
Spring + Kotlin Guide — https://spring.io/guides/tutorials/spring-boot-kotlin/ Official tutorial building a web application with Spring Boot and Kotlin. A good first project.
Android Developers Documentation — https://developer.android.com/docs The canonical Android reference. The "Guides" section covers architecture, Jetpack Compose, and all major Jetpack libraries.
Jetpack Compose Documentation — https://developer.android.com/jetpack/compose/documentation Dedicated documentation for Compose — the modern Android UI toolkit used in Modules 09–10.
Kotlin Coroutines Guide — https://kotlinlang.org/docs/coroutines-guide.html The definitive guide to Kotlin coroutines, written by JetBrains. Read this alongside Module 03.
Gradle Kotlin DSL Primer — https://docs.gradle.org/current/userguide/kotlin_dsl.html Official Gradle documentation for the Kotlin DSL. Essential reference for Module 08.

Kotlin Bootcamp for Programmers (Google/Udacity) Free course by Google and JetBrains. Good supplement to Modules 01–02. [Verify URL: https://www.udacity.com/course/kotlin-bootcamp-for-programmers--ud9011]
Developing Android Apps with Kotlin (Google/Udacity) Free Android course using Kotlin. Covers fundamentals through intermediate Android patterns. [Verify URL: https://www.udacity.com/course/developing-android-apps-with-kotlin--ud9012]
Ktor for Beginners (Kt. Academy) Covers Ktor, a Kotlin-native web framework. Useful complement to the Spring Boot modules. [Verify URL: https://kt.academy/course/ktor]

Kotlin YouTube Channel (JetBrains) — https://www.youtube.com/@Kotlin Official JetBrains channel with talks, tutorials, and KotlinConf recordings.
Google Android Developers YouTube — https://www.youtube.com/@AndroidDevelopers Official Android team channel; includes Jetpack Compose tutorials and Android architecture talks.
Spring Developer YouTube Channel — https://www.youtube.com/@SpringSourceDev Official Spring team channel; SpringOne conference talks, tutorials, and deep dives.

Kotlin Slack — https://kotlinlang.slack.com Active community with channels for coroutines, Android, Spring, KMP, and more.
Kotlin Weekly Newsletter — https://kotlinweekly.net Weekly digest of Kotlin articles, library releases, and conference talks.
ProAndroidDev on Medium — https://proandroiddev.com High-quality Android and Kotlin articles from practitioners.
Baeldung Kotlin — https://www.baeldung.com/kotlin Code-heavy tutorials covering Spring + Kotlin, coroutines, testing, and JVM topics.

IntelliJ IDEA Community Edition — https://www.jetbrains.com/idea/download/ The recommended IDE for Kotlin development. Free Community Edition covers all non-Android use cases.
Android Studio — https://developer.android.com/studio The official Android IDE (built on IntelliJ IDEA). Required for Modules 09–10.
SDKMAN! — https://sdkman.io Manages JDK versions, Gradle, and other JVM tools on macOS/Linux.
Kotlin Playground — https://play.kotlinlang.org Browser-based Kotlin REPL; useful for quick experiments without setting up a project.
Spring Initializr — https://start.spring.io Official Spring Boot project generator. Select "Kotlin" as the language to get a Kotlin-configured starter project.