Cash App’s Summer of Kotlin Multiplatform

At Cash App we use Kotlin on all of our platforms.

• In 2015, we started using ‘Project Kotlin’ in our Android app.
• In 2017, we chose Kotlin as our new language for backend services.
• In 2019, we began experimenting with Kotlin/Native on iOS.
• In 2021, we adopted Kotlin/JavaScript for shared presentation logic in our clients.

In the tradition of Seven Days of Open Source and Square Open Source ♥s Kotlin, the next several weeks will be our Summer of Kotlin Multiplatform. We’re preparing a series of blog posts and open source releases on Kotlin Multiplatform.

We’ll use this page to collect each post in the series.

• June 6: Kotlin Multiplatform Money Formatter
• June 13: Dynamic Kotlin with Zipline
• June 21: Flow testing with Turbine
• June 27: Paraphrase: Type-Safe String Resource Formatting for Android
• July 5: Native UI and multiplatform Compose with Redwood
• July 12: Multiplatform image loading: Coil 3.0
• July 19: A stable, multiplatform Molecule 1.0
• July 26: Announcing SQLDelight 2.0
• August 2: Okio 3.5 has WASM
• August 9: Poko goes multiplatform

We’re excited to have fun everywhere this summer.