From 30 Minutes Down to 10: Taming our Monolith's CI Build Times
When Cash App was originally developed we had a single service powering all backend functionality, codenamed “Franklin”.
How Cash App optimizes Android performance
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A stable, multiplatform Molecule 1.0
Molecule is a Compose-based library which we announced two years ago for managing application state. I’m excited to announce that today we are releasing version 1.0, its first stable version!
Native UI and multiplatform Compose with Redwood
Redwood is Cash App’s take on multiplatform mobile client UI. Unlike many of the existing solutions to this problem, our values are slightly different
Flow testing with Turbine
Say hello to Turbine 1.0, our library for testing kotlinx.coroutines Flow and more.
How We Sped Up Zipline Hot Reload
Zipline is a library Cash App has developed for fetching and executing code on demand in a mobile app. Developers write their code in Kotlin and it gets compiled to JS, hosted on a server or CDN
Molecule: Build a StateFlow stream using Jetpack Compose
Back in November 2021, Jake wrote about Molecule on this blog when it was still under development. A few weeks ago, we released 0.4.0 which we are using in production with great satisfaction.
The state of managing state (with Compose)
Five years ago the Cash App Android client started splitting our UI rendering and UI presenter responsibilities into distinct types. We had leaned into RxJava heavily in the years prior
A Great Way to do Android Presenters
The Cash App Android app uses presenters because they’re easy to write, easy to review, and result in boring code that just works.