It’s in your hands
to revolutionize the industry
of Android Development

Join the community of Kotlin enthusiasts and Android quality lovers


  • A PDF guide to write your first lines with Kotlin. “Create your first Android project with Kotlin in 15 minutes“.
  • Access to my mini-course to learn the basic concepts that will allow you to start developing with Kotlin.
  • Exclusive content to become an expert in Kotlin and Android.
I’m an official Kotlin Certified trainer by JetBrains, which means that the quality of my training has been verified by the company that created the language.

The book

Recommended by both Google and Jetbrains to learn Kotlin for Android development

The online course

Learn Kotlin from home at your own pace while developing an Android App. Easy and fun!

The blog

You can review all my free posts and learn on your own from specific topics

Kotlin is the the way to go for App development in Android

If you are an Android developer, you are passionate about your profession and you like to stay abreast of new developments in the sector, you may have heard about Kotlin.
  • The language created by Jetbrains is powerful, simple and versatile.
  • It adapts perfectly to Android development.
  • It allows you to avoid many of the obstacles that you will find in Java, thanks to the application of new concepts such as functional programming, lambdas or data classes.
Using Kotlin translates into saving time in your daily work, in new possibilities to unleash your creativity, and in helping you be at the forefront in the field of application development.

1 out of 4 Apps in the Play Store today already use Kotlin for Android development. They have discovered its power and have started investing in training for their employees.

This means that the demand for Kotlin developers is imminent, and the number of jobs that require Kotlin is growing exponentially.

Info taken from KotlinConf Keynote 2018 and Kotlin blog

Hi, I’m Antonio Leiva

I’m Android Engineer and Google Developer Expert for Kotlin. Since I discovered Kotlin in 2015, I’ve devoted a lot of time taking the most from Kotlin and applying it to Android development.

Now, I help other developers to become experts in Kotlin for Android through different training modalities.

My goal is to show you how to use Kotlin in an Android environment in record time so that you can improve your productivity, overcome the limitations imposed by Java and stand out as a developer by applying a modern, simple and functional code.

If you have developed Android applications with Java it’s possible that:

  • You have found yourself in situations that block you and make you spend too much time to find a solution that is easier with Kotlin.
  • You’ve felt frustrated discovering that 90% of your application errors are NullPointerExceptions.
  • Or you have seen yourself writing repetitive lines of code that consume your time. I can imagine those hundreds of getters and setters in your data classes.
  • In short, you have felt that your creativity has been limited by the limitations of the language itself.

Kotlin is a modern, powerful and safe language that will allow you to overcome these obstacles in the quickest and easiest way you can imagine.

Latest blog entries

Koin for dependency injection on Android. Is Dagger dead?

Koin for dependency injection on Android. Is Dagger dead?

Koin is an alternative to Dagger that takes advantage of Kotlin features to make dependency injection much easier. In the video above, I explain why you need a dependency injector, what's the difference between Dagger and Koin, and a...

Data Binding on Android to implement the real MVVM

Data Binding on Android to implement the real MVVM

Data Binding is really easy and can save you from a lot of boilerplate when connecting your data to the UI, and also to update it when something changes. Here I show you an example from scratch, and how to apply it to the MVVM presentation pattern:...

You have seen me in

Follow me on social networks