Kotlin Multiplatform is no longer “experimental curiosity” — it’s a serious choice for production apps. Companies like Netflix, Cash App, and McDonald's are already using it to share business logic across platforms while keeping native UI experiences intact ( LevnTech ). In this post, I’ll walk through how I built a production-ready Kotlin Multiplatform SDK that works seamlessly across Android and iOS — along with the real challenges, trade-offs, and lessons learned. 🤔 Why Kotlin Multiplatform? Unlike Flutter or React Native, Kotlin Multiplatform doesn’t try to replace native development. Instead, it lets you: Share business logic (networking, caching, models) Keep native UI (Jetpack Compose / SwiftUI) Avoid code duplication Maintain near-native performance This approach is powerful because you’re not forced into an “all-or-nothing” architecture — you can adopt it gradually ( InfoQ ).…