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©2024 Wantedly, Inc. Introduction to Kotlin Multiplatform Jul 26, 2024 - Yuya Harada

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©2024 Wantedly, Inc. At a tech event in June…

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©2024 Wantedly, Inc. Wantedly's Key iOS Tech Stack

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©2024 Wantedly, Inc. Wantedly's Key iOS Tech Stack + SwiftUI Kotlin Multiplatform

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©2024 Wantedly, Inc. "Why use Kotlin for iOS? Isn't it for Android?" 🤔 🤔 🤔

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©2024 Wantedly, Inc. Agenda 1. Explore Kotlin Multiplatform 2. Advantages and Challenges 3. Personal Experience

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©2024 Wantedly, Inc. Provide overview of Kotlin Multiplatform My Goal

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©2024 Wantedly, Inc. Provide overview of Kotlin Multiplatform if it is worth considering for your projects? 🤔 My Goal

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©2024 Wantedly, Inc. Agenda 1. Explore Kotlin Multiplatform 2. Advantages and Challenges 3. Personal Experience

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©2024 Wantedly, Inc. "Has anyone here tried Kotlin Multiplatform?" 🙋 🙋 🙋

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©2024 Wantedly, Inc. What is Kotlin Multiplatform? Kotlin shared code • Abbreviation: KMP • Tool to build apps with a single Kotlin codebase • Can be shared across platforms App App

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©2024 Wantedly, Inc. Share logic and keep the UI native UI • iOS → SwiftUI • Android → Jetpack Compose https://www.jetbrains.com/kotlin-multiplatform/ Logic • KMP

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©2024 Wantedly, Inc. Share both logic and UI UI • Compose Multiplatform ⚠ iOS is in Beta https://www.jetbrains.com/kotlin-multiplatform/ Logic • KMP

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©2024 Wantedly, Inc. Agenda 1. Explore Kotlin Multiplatform 2. Advantages and Challenges 3. Personal Experience

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©2024 Wantedly, Inc. ✅ Share business logic across platforms App App business logic KMP • networking • data storage • data parsing

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©2024 Wantedly, Inc. An app that fetches random news data

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©2024 Wantedly, Inc. Repository UseCase ViewModel UI An app that fetches random news data

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©2024 Wantedly, Inc. Share logic and keep the UI native UI • iOS → SwiftUI • Android → Jetpack Compose https://www.jetbrains.com/kotlin-multiplatform/ Logic • KMP

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©2024 Wantedly, Inc. Repository UseCase ViewModel UI An app that fetches random news data

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©2024 Wantedly, Inc. Repository UseCase ViewModel UI KMP An app that fetches random news data • SwiftUI • Jetpack Compose

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©2024 Wantedly, Inc. Advantages ♻ Code Reusability 🧑🔧 Maintainability ✅ Reducing test burden

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©2024 Wantedly, Inc. Challenges 🤖 Requires Kotlin knowledge & IDE 🐘 Familiarity with Gradle 📚 Library limitations

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©2024 Wantedly, Inc. Agenda 1. Explore Kotlin Multiplatform 2. Advantages and Challenges 3. Personal Experience

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©2024 Wantedly, Inc. Personal Experience Without KMP Team Composition 🧑💻 👨💻

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©2024 Wantedly, Inc. Team Composition 🧑💻 👨💻 Platforms Personal Experience Without KMP

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©2024 Wantedly, Inc. Team Composition 🧑💻 👨💻 Platforms Development Process Personal Experience Without KMP

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©2024 Wantedly, Inc. Challenges Faced iOS • Redundant business logic • Duplicate unit tests Logic UI Local DB Unit Test Android Logic UI Local DB Unit Test Time-consuming development

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©2024 Wantedly, Inc. “If I could use KMP, it eliminates redundancy…” 😩😩😩

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©2024 Wantedly, Inc. Provide a clear overview of KMP if KMP is worth considering for your projects? 🤔 My Goal

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©2024 Wantedly, Inc. https://www.wantedly.com/companies/wantedly/post_articles/913551

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©2024 Wantedly, Inc. Thank you for listening!! 🎉🎉🎉