"Are you still modifying your code every time you change the server address?" In professional practice, Development (Dev), Staging, and Production (Prod) environments are strictly separated. However, many developers still manually change variables within a single main.dart file, exposing themselves to the risk of deployment errors. This course covers a 'true professional-grade architecture' that allows you to switch environments instantly just by selecting a build target, without modifying a single line of code.

Essential Java syntax review before studying Java-based development.

Practical course building an app from start to finish, at a level used in actual services. Learn scalable and easy-to-maintain app development methods by applying Clean Architecture and MVVM patterns.

This lecture explains unit testing, UI testing, and integration testing methods in Flutter based on the official documentation.

This is a comprehensive lecture on Kotlin grammar that can be learned in 1 hour.

This is a guide course on proper dependency injection in Flutter. It presents how to use DI utilizing the injectable package.

This course is designed for everyone starting Flutter to quickly learn the Flutter basics.

You can experience an example of implementing an app with clean architecture, including caching techniques using a local DB, CSV parsing, and custom drawing using Canvas.

You will learn how to write better, more maintainable code by applying clean architecture to your Flutter apps. This is a must-have course for intermediate and above level learners.

Jetpack Compose is Android's modern toolkit for building native UIs. Build apps quickly and vibrantly with less code, powerful tools, and intuitive Kotlin APIs.

If you have started Java development but feel overwhelmed when trying to solve a problem, it is time to study design patterns. I will explain 10 of the GoF design patterns that I personally use the most.

In this course, you will learn several ways to develop reactive and extensible Android apps using various libraries from Kotlin and Jetpack, which are widely used in practice.