Block Joins the Kotlin Foundation as a Silver Member

We’re excited to announce that Block, Inc. has joined the Kotlin Foundation as a Silver Member!

Block is dedicated to increasing access to the global economy through its innovative technology. With brands like Square, Cash App, Afterpay, TIDAL, Bitkey, and Proto, Block is making significant strides in transforming commerce, finance, and digital services for everyone.

This milestone highlights a special, shared history between our engineering teams and the Kotlin community. Block’s journey with Kotlin dates back to 2015, when Square became one of the early adopters of Kotlin for Android, choosing Kotlin for production with Project Kotlin.

This deep commitment to Kotlin is more than just adoption – Block has actively contributed to Kotlin’s ecosystem. Square’s engineers have developed several popular open-source libraries like OkHttp, the default HTTP client on Android, and Okio, which has now inspired Kotlinx-io, JetBrains’ new multiplatform I/O library. These libraries set benchmarks in reliability and performance, and have been Kotlin-friendly from the start. Additionally, Block’s early adoption of Kotlin Multiplatform allowed their teams to collaborate on a single codebase, sharing business logic across Android, iOS, and backend systems.

As a Silver Member, Block will continue to support the Kotlin community through funding, expertise, and participation in shaping the future of Kotlin. Their involvement helps ensure Kotlin’s continued growth, especially in industries like fintech.

In addition to Block’s exciting partnership, we’re also celebrating Meta joining as a Gold Member.

We’re excited to collaborate with both Block and Meta, and look forward to the valuable expertise and scale they’ll bring to the Kotlin Foundation’s mission.

To learn more about the Kotlin Foundation and how to get involved, visit the Membership page.

Let’s keep shaping the future of Kotlin—together.