Level 3 · Advanced APIs & architecture

Goal: build real backend services with Kotlin — Ktor APIs, database access, Flow-based coroutines, and multiplatform fundamentals.

Modules

1. Advanced Coroutines (Flow)
2. Building APIs with Ktor
3. Databases (Exposed/SQLite)
4. Design Patterns in Kotlin
5. Kotlin Multiplatform Basics
6. Testing Advanced
7. DSLs in Kotlin
8. Android Basics
9. Performance & Profiling
10. Project — REST API + Database Service

By the end of this level you'll be able to design and build a tested, database-backed REST API with Ktor, understand Flow-based asynchronous streams, and know your way around common design patterns and DSL design in idiomatic Kotlin.