COJetBrains · on Coursera
Kotlin for Java Developers
Intermediate 40 hours English Course Certificate
Our recommendation
JetBrains' course on Kotlin for Java developers, teaching Kotlin — the modern language for Android and JVM development — to people who already know Java. It is made by the creators of Kotlin, and a strong, credible route to picking up the language. Aimed at Java developers, not beginners.
Skills you'll gain
KotlinJavaJVMCoroutinesAndroidFunctional programming
Is this course right for you?
A good fit if you…
You know Java
You want to learn Kotlin
You work on JVM or Android
Consider something else if you…
You are new to programming
You do not know Java
You want a different language
About this course
This JetBrains-authored course teaches Kotlin to Java developers: Kotlin's type system, null safety, data classes, extension functions, lambdas, and the Kotlin standard library. Students convert Java code to idiomatic Kotlin throughout, learning how Kotlin's features reduce boilerplate while maintaining JVM compatibility.
What you'll learn
Write idiomatic Kotlin using data classes, extension functions, and sealed classes
Apply Kotlin's null safety system to eliminate NullPointerExceptions
Use lambda expressions and functional programming patterns in Kotlin
Implement coroutines for structured concurrency and async programming
Interoperate between Kotlin and existing Java codebases
This course includes
40h
On-demand video
Yes
Certificate
Yes
Mobile access
English
Language
What it costs
Free to audit on Coursera; the certificate needs a subscription (about $49 a month), with financial aid available.
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Prices & availability can change — confirm on the provider's site. We're not affiliated with any single provider.
Is the certificate recognised?
Issued through Coursera with JetBrains, the creators of Kotlin. The skills matter most.
Instructor
SI
Svetlana Isakova
Coursera instructor
180K+ learners3 courses4.8 instructor rating
Svetlana Isakova is a Kotlin Developer Advocate at JetBrains and co-author of Kotlin in Action — one of the principal educators of Kotlin's design philosophy.
About this provider
CO
Coursera
University-backed online learning platform. 142M learners, 7,000+ courses from 325+ institutions.
Frequently asked questions
Yes. It is designed for Java developers and teaches Kotlin by building on Java knowledge.
Yes for learning Kotlin credibly — it is made by JetBrains, the creators of the language.
You can audit it free on Coursera; the certificate needs a subscription, with financial aid available.
No. Kotlin is popular for Android but works across the JVM for back-end and other development too.
About 40 hours — a few weeks to a couple of months part-time.