Showing 16 of 16 articles (Page 1 of 1)
Unit tests are great. They give us confidence to build and change our software. Sometimes I want to write a test once and run it for multiple algorithms, inputs, or environments. It’s been possible to do this with JUnit for a long time:
Cash App strives to be an excellent platform citizen everywhere our app is available, and a key part of that is respectfully using our customer’s bandwidth and device storage.
When Cash App was originally developed we had a single service powering all backend functionality, codenamed “Franklin”.
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!
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
Say hello to Turbine 1.0, our library for testing kotlinx.coroutines Flow and more.
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
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.
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
Crashes can be one of the most straightforward types of issues to debug. There are many different categories of crashes that can happen on iOS - everything from bad memory access
This is the final post of a three part series. In part one, we discussed the performance problems that we found with our activity feed and some of the changes we made to the way we use dispatch queues.
This is the second post of a three part series. In part one, we discussed the performance problems that we found with our activity feed and some of the changes we made to the way we use dispatch queues.
This is the first post of a three part series discussing recent performance improvements we made in our iOS app.
The Cash App Android app uses presenters because they’re easy to write, easy to review, and result in boring code that just works.
Unit tests are great for testing business logic, snapshot tests make sure your views look correct, and UI tests help to ensure everything fits together properly. How do you test your app’s accessibility though?
Adding animations to your app turns a fairly routine interaction into a more enjoyable, exciting experience. These animations make a straightforward design into something that feels polished and professional.