Full-stack Compose Kotlin Multiplatform Masterclass - KMP (Udemy.com)
Build a production ready app that runs on Android, iOS, Desktop and Web with a single codebase!
Created by: Petros Efthymiou
Last updated February 2026
What you will learn
- Compose Multiplatform
- Build Android apps
- Builds iOS apps
- Build desktop apps (macOs, windows, linux)
- Build web apps
How it compares
Against the other 1,182 rated Udemy courses in IT & Software on CourseDuck:
- Rating4.4 out of 5higher than 30% of them
- Reviews147#903 of 1,183 by number of reviews
- Length3.3 hoursshorter than 68% of them
- Last updatedFebruary 2026more recently than 65% of them
Course Description
The Fullstack Compose Multiplatform Masterclass by Petros Efthymiou.
Learn how to build native iOS, Android, Desktop and Web apps with a single codebase.
- The sequel of the best-seller KMP Masterclass.
Are you following dozens of forums and articles and buying courses in order to move your development skills and career to the next level?
I am, too, but more often than not, after completing them, I realize that there is still a HUGE amount of work left to be done to connect all the pieces together and make them work on an actual production application. I found that even though a course was providing comprehensive knowledge on networking with Ktor, it didn't combine it with Clean architecture, dependency injection, or a local DB with SQL Delight. And because another course was extensive on SQL Delight, it was missing the rest of the best practises.
After buying courses, reading articles & forums, and getting my hands dirty, I combined the Compose Multiplatform best practices in a single course to build an actual production application together.
I created this course to make the process easier for you! You are going to learn how to combine:
Compose Multiplatform
Kotlin
Coroutines
Ktor
Koin
SQL Delight
Kotlin State Flow
Clean Architecture
MVI
And complete actual Android, iOS, Desktop and Web applications using the industry's best practices
My approach is to build an application together that can be forked and used as a base in your actual work.
Why Me?
I am a seasoned Mobile engineer, author, and Instructor with more than 10 years of experience. I have been working as a Mobile engineer from junior to lead positions in ambitious startups & large multinational companies since 2013. Being a sound engineer, though, doesn't automatically mean that you are an excellent instructor.
In my lifetime, I have trained hundreds of thousands of developers in classrooms, web conferences, video courses, blog posts, and books.
Among other things, I have created a best-selling Android Udemy course called Android TDD Masterclass. I have also written a best-selling Amazon book, Clean Mobile Architecture, which has prepared thousands of mobile developers to become mobile architects.
Furthermore, in the past 7 years, I have delivered countless courses, seminars, and lectures in institutions, including New York College and Hellenic American Union. My current position is as a Mobile Trainer in a Multinational company called Backbase, where I am training
The internal RnD engineers
The internal professional services engineers
External third-party integrators
Why is it important?
Kotlin Multiplatform is now considered stable and ready to be used in Android production applications. Compose Multiplatform is following the on the same successful path.
Unlike all other cross-platform applications with KMP you can rip the advantages of both native and cross-platform solutions. KMP gives you the option to build native UIs using Jetpack Compose and SwiftUI while sharing all the business logic, infrastructure, and boilerplate code.
On the other hand a startup the lacks the headcount and budget to hire specialized Android, iOS, web and potentially desktop devs can benefit greatly from Compose Multiplatform. Because you can build all those apps with a single codebase.
And unlike with all the other cross platform solutions you can still decide to build native UIs later one when the budget is secure, while getting to keep the biggest part of your codebase.
Currently Compose Multiplatform is a no-brainer compared to all the other cross-platform solutions!
Instructor Details
- 4.4 Rating
147 Reviews
Petros Efthymiou
Hi, I am Petros, and I am a passionate Software Engineer and instructor with over 10 years in the industry.
I struggled a lot in my early stages when I realized that in order to take my career to the next level, I needed to learn how to do things properly instead of just "making it work." In my journey to become a better engineer, I followed hundreds of courses, articles, books, and conferences. What I have always been missing is a single source where I could find the best practices integrated and working together. I often studied TDD, for example, but was unable to apply it to a production Coroutines-based system. This is the problem I am tackling in my courses.
I am teaching best practices using real-life examples. I make sure to explain all the reasoning behind every decision but also provide a state-of-the-art skeleton that you can re-use on your own product instead of having to combine the pieces by yourself.
I have worked on multiple Companies ranging from ambitious startups to large multinational companies as a Senior Engineer and Software Instructor. Currently, I am employed in Backbase as a software instructor team lead, making sure that our superstar developers revolutionize the old, rotten banking industry.
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Reviews
By Aleksandr Mironov on 8/15/2026
A very useful course for getting familiar with the basics of Compose Multiplatform. However, for me, it was painful to watch the project show compilation errors in the IDE for a couple of hours. The author mentioned that the errors should disappear after restarting the IDE, but kept working with the project for a long time without restarting it. I don't think it's ok to leave visible IDE errors unresolved for such a long time in a tutorial video, it is very distracting
By Patel Rumitkumar Dashrathbhai on 5/27/2026
Very Good explanation. I think just one thing missed is configure the project to run on macOS. I got some challenges to run the iOS app on older mac.
By Héctor Alpízar on 10/1/2025
Aprendi cosas de multiplatform que no sabia. Como la ibreria de Kamel y Voyager. Por lo general no uso KMP para otra cosas que no sean movil. Pero es bueno saber que hay opcion para Desktop y Web.
By Rafael Valentim Fonseca on 8/25/2025
O Curso é excelente. O instrutor domina o conteúdo e sabe passar para os alunos. Tudo muito bem detalhado. Como estou usando as versões mais novas de algumas dependências, as vezes necessito realizar adaptações, mas nada que impeça o andamento do curso.
By Thomas Boksberger on 4/11/2025
I think it's a shame that the code from another course is simply used to rebuild it. The learning effect is greater if you create the entire code. This way you are forced to book the first course as well. Not because of the content, but because of the code. I also find it bad to continue with warnings in the code and simply point out that they will go away when you restart the IDE (they didn't work for me).
By Sathya on 4/6/2025
The course is well structured. with a smooth flow. But I'm stuck at 7. Integrate Compose Multiplatform Part 2 for over a week! I figured out we need to set up Xcode to integrate the same with Android! Attached the link. I'm still struck with it! Any help would be appreciated. https://www.jetbrains.com/help/kotlin-multiplatform-dev/multiplatform-integrate-in-existing-app.html#make-your-cross-platform-application-work-on-ios
By Greg Petrov on 11/15/2024
Course is nice. In companion with Mobile KMP Course created also by Petros it gives holistic view of how cross-platform apps can be built with Kotlin Multi-platform. I have only one thing to mention: Full-stack usually means that both Client and Server side implemented. While Ktor is used for remote data source access and also can be used for Web server development, in this course no backend implemented. It is very minor to me but it can cause misunderstanding if someone expecting server-side implemented.
By Marco Tulio Todeschini Coelho on 8/2/2024
The instructor shows an excelent grasp of Jetpack Compose and Compose Multiplatform, how to configure gradle for different projects, and how to adapt a project with native screens into Compose Multiplatform. Given Compose Multiplatform is still somewhat experimental, the Instructor went above and beyond to make sure the project would work on all four target platforms, making this course something beyond the average course where the students have a hard time following the instructor, because the libraries have changed and are no longer compatible. I highly recommend this course to anyone interested in hybrid development or Kotlin development.
By Ana Brown on 5/7/2024
The course in enjoyable and easy to follow. The length is optimal for a Udemy couse, I didn't feel like I wasted a single minute while watching the course.
By Josh Ellis on 5/4/2024
Another high quality course from Petros. The duration of the course is ideal to learn about all the important concepts of Compose Multiplatform with a small time investment. I enjoyed it.
Quality Score
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Overall Score : 88 / 100









