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Kotlin Multiplatform

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Kotlin Multiplatform Mobile (KMM) lets you write business logic once in Kotlin, compile to JVM (Android), native (iOS), JavaScript (web). Mastery takes 8-10 weeks. Practitioners earn 30-40% premium because they reduce code duplication 50-70%. The 3% who architect multiplatform apps (shared domain, platform-specific UI) are highly valued in mobile teams.

Kí ni Kotlin Multiplatform

Kotlin Multiplatform is a feature in Kotlin allowing code to run on multiple platforms (iOS, Android, web, desktop) without modification. Write business logic once in Kotlin (shared module), platform-specific UI in native languages (Swift for iOS, Kotlin for Android, JavaScript for web). The architecture separates concerns: domain models, networking, persistence (shared), UI frameworks (platform-specific). Gradle builds native binaries for each platform using the Kotlin compiler's multiple backends (JVM for Android, native for iOS, JavaScript for web).

🔧 ÀWỌN ỌRỌ IṢẸ́ & ÀGBÈGBÈ
Kotlin languageKotlin MultiplatformGradle build systemKtor clientCoroutinesiOS native bindingsAndroid StudioXcode integration

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ÀgbègbèỌ̀dọ̀ÀrinÓ Ga
🇺🇸USA$90k$160k$240k
🇬🇧UK£55k£98k£150k
🇪🇺EU€60k€108k€160k
🇨🇦CANADAC$95kC$165kC$250k

🎓 Àwọn ìjẹ́rìísì

Kotlin Official Documentation→Jetbrains Kotlin Multiplatform Guide→Kotlin Playground→

🎯 Àwọn iṣẹ́ tí ń lò Kotlin Multiplatform

Fitness App Developer
Mobile Developer
Software Engineer

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▶When should I use Kotlin Multiplatform vs. React Native?
React Native: write UI in JavaScript. Kotlin Multiplatform: write business logic in Kotlin, native UI per platform. KMM is better for complex logic (financial calculations, encryption); React Native is better for UI-heavy apps. Both have trade-offs.
▶How does Kotlin compile to iOS?
Kotlin has multiple backends: JVM (Android), native (iOS/macOS, Clang-based), JavaScript (web). Shared code is common Kotlin; platform-specific code uses expect/actual. Compiler handles platform differences.
▶What's expect/actual?
expect = interface (abstract in common code). actual = implementation (platform-specific). Example: expect fun getDeviceId(): String. Android actual = read from SharedPreferences. iOS actual = read from Keychain.
▶Can I share UI code?
Not easily. UI depends on platform (UIKit, SwiftUI, Jetpack Compose, web frameworks). Share business logic (domain models, API clients), not UI.
▶What about performance?
Kotlin multiplatform: native compilation = performance matching native. No JavaScript overhead (like React Native). Native iOS and native Android performance.

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