One Language. One Codebase. 5 Apps.
Master Kotlin & Compose Multiplatform development by building an industry-scale multi-module chat app in over 170 video lessons
You want to…
... build large-scaling apps for the entire stack using Kotlin?
... learn about advanced architectural principles from the real world?
... maximize the amount of Kotlin code you share in your app with secret tips you don't find online?
... learn to approach big projects from absolute scratch?
... learn KMP & CMP from a course that has been approved by JetBrains, the makers of these technologies?
After This Course, You Will…
Truly understand the technologies that matter in the industry
The chat app you’ll learn to build intentionally includes all those technologies that truly matter for the vast majority of apps in the industry.
Confidently build apps for 5 platforms
With just Kotlin, you will be able to build five production-grade Kotlin Multiplatform apps – targeting Android, iOS, Windows, MacOS & Linux.
Understand advanced architecture & system design
These courses not only focus on building a solid software architecture from scratch, but teaching you in a way that you truly understand why architectural decisions are made the way they are.
Build a 100% Responsive Chat App From Scratch
This is Chirp – a multi-module chat app you’ll learn to build with Kotlin & Compose Multiplatform as well as a Kotlin Spring Boot backend
Covers Everything the Industry Demands.
Philipp Lackner’s quality standard is to not only cover what you need in the real world, but also involve you into his own thought process behind every single of 20,000 lines of Kotlin code.
Architecture & System Design
Learn about the fundamentals of backend system design and app development architecture – and how to decide which approach is right for your app.
KMP & CMP Internals
KMP & CMP Internals
Truly understand how KMP & CMP work under the hood to be able to better understand what you can do when things go wrong.
Multi-Module Architecture With Gradle
You’ll still have to fight Gradle – but after finishing this course bundle you’ll know how to do so without giving up.
100% Responsive UI
Transform professional Figma mockups into a reusable custom design system in Compose Multiplatform – 100% responsive with light & dark theme.
Networking
Master making HTTP requests from the client as well as properly handling these incoming requests on the server side.
Authentication & Session Management
Understand how you can implement a registration & login system with forgot password and email verification functionality.
Offline-First Development
Implement a local database with multiple tables and relations to make the entire client app work in offline-mode.
WebSockets
Establish a real-time connection between server & client to notify each other about new chat mesages and other important updates instantly.
Deeplinking
Learn to let clicks on URLs open your client app directly from the browser – very useful for email verification or reset password links.
Photo Picking & Uploads
Implement native photo pickers in the client apps and upload these to the server. Server side, you will truly understand efficient remote file storage.
Push Notifications
Use the Firebase Admin SDK to send push notifications to Android & iOS devices when new chat messages arrive. On all desktop platforms, you’ll implement native local notifications.
Pagination
Both server and client will follow a pagination approach to only load the data the client actually needs to display.
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Philipp Lackner has over 14 years of experience in the software field. Over the past years, he built a following of over 250,000 developers on social media who trust his work. With over 25,000 sold copies of his courses and 1,000h+ spent for teaching Android concepts, he already helped hundreds of thousands people to learn practical skills they can immediately apply.
He has a degree in computer science, however it didn’t go as expected. The amount of theory that was taught in university made him think about a better approach to learn what is really needed in the real world. Over time, Philipp found mentors who taught him exactly that in a practical setting. That was the game changer for his career.
After having worked for dozens of companies around the globe as a consultant, Philipp now wants to teach other Kotlin developers what really counts for becoming an outstanding developer in today’s competitive industry.
- Felt lost in his own projects
- Didn't feel confident in Android interviews
- Confidently nailing coding interviews
- Feels confident about advanced topics like multi-module architecture
- Convinced employers of having a higher seniority than before
- Android developer in India
- No real hands-on experience on developing complex apps
- Low salary
- Got a well-paying job in Canada
- Understood the new company's tech stack the moment he joined
- Confidently develops real-world applications
- Wasn't able to build his own apps
- Felt insecure about architecture, Compose and more advanced topics
- Approaches projects for himself and clients confidently
- Truly understands the entire relevant Android tech stack
What People Are Saying
About Philipp’s Courses
Real-world insights, structured learning, and expert mentorship that transform careers.
"This course brought me back on track really fast and Philipp really took care to convey general knowledge that can be applied on every Android project."
"I have been using modularization for a long time, but I learned new cool stuff and tricks in your course that will change my way of thinking about how I should design my code."
"What’s unique about Philipp, that he cares about those who are looking for help, he answers to PM’s, I’ve never had experience like that."
"Your course let me also the opportunity to enhance my jetpack compose and unit test skills . So, I can consider me super satisfied. Please, don’t stop mentoring."
"Taking any of Philipp’s courses makes you go from 0 to almost 100 in understanding the concepts in no time. He explains the basics so well and teaches real world application use cases."
"I’ve had struggles working with big projects, but after this course I feel so much more confident in my skills in building large robust apps."
"I recently completed this course, and I couldn't be more thrilled with the experience! This course exceeded my expectations in every way. Philipp's real-world experience was evident. He covered everything from Ul design to integrating APls and managing databases,... Overall, this course was an incredible learning journey. I highly recommend it to anyone looking to start or advance their career in Android development!"
"Philipp is an amazing developer who explains the most difficult topics in a way that's digestible and it stays with you. Everything is through practical examples. He's someone you'd want to go to, to understand something that you can't understand"
"This is one of the best courses for android development I have taken, not only we get to learn a lot but we also get an insight of where the industry is heading and how to approach problems and projects."
The Full Offer at a Glance
Make a one-time investment and gain skills that last forever
- Building Industry-Level Compose Multiplatform Android & iOS Apps: Get access to 170 video lessons spanning over 30h, professional Figma mockups, homework tasks and 12-month access to the Chirp APIUnit price:319€
- Optional Add-On: Building Industry-Level Compose Multiplatform Desktop Apps: Get access to 21 extra video lessons spanning over 4h, as well as desktop design extensions for the Figma mockups.Unit price:149€
Frequently asked questions
The prerequisites are understanding basic concepts of the following technologies:
- Kotlin
- Jetpack Compose
- Optional: KMP basics
Even if you don’t yet know the basics of these technologies, the courses will outline a roadmap of free resources from PL Coding to get on a level to proceed with this bundle.
Yes, after following through the courses, you can take a final quiz that covers the concepts taught in the course. If you pass it, you will be awarded a certificate that proves that you can confidently apply full-stack concepts with Kotlin.
We’ve collaborated with JetBrains – the makers of Kotlin Multiplatform itself – to create this course. This means the entire course bundle has been reviewed and approved by JetBrains’ KMP developer advocates – those people who fundamentally contributed to the technology itself.
Just as for all of our courses, you get a voluntary 30-day money back guarantee in case you’re not satisfied with the course content.
We guarantee access for at least 24 months.