The Corner

Update to Square Reader SDK

Today we’re releasing OkHttp 3.13

We’re excited to share that Square has been elected to a third term on the Payment Card Industry Security Standards Council’s board of…

Idempotency is something you might not see every day, but it is an important concept, especially when you are taking payments.

A secure, customizable in-app payment solution for iOS, Android, and Flutter.

At Square, the Developers team exposes APIs that allows third-party developers to build custom business-processing solutions. On October…

SQLDelight started as a project 4 years ago on the ContentValues and SQLiteOpenHelper APIs from Android with the goal of making writing…

Ripping Vitess apart and putting it back together.

The lemurs are back! This time they’ve come for a special Christmas-themed adventure about how Christmas scales, using practical lessons…

KotlinPoet is a collection of Kotlin API that makes generating .kt files easy. It’s inspired by JavaPoet, a Java code generation library…

Square Payment Form now supports express checkout experiences with digital wallets.

How to take a copy of something too large to fit in a single shot

Sharding Cash’s database with Vitess was a massive undertaking that set us up for the future, but it was just the start of the journey…

Take In-App and In-Person Payments with Square Flutter Plugins

Learn how to implement the Square Online Payments form using React

How we made our webhooks more reliable using SQS and Lambda

In our third and final post of our series, “Women of BTC”, we’ll hear from Tobi Kral on the Engineering team and Alaina Tyrer on Executive…

One of the main reasons Vitess was such a success for Cash App is that it abstracts database sharding away from the application code. This…

Square for Retail was released in 2017 as Square’s first vertical-specific Point of Sale — solutions geared toward a particular subset of…

Before we could partition our database we needed to prepare our data model. Here’s how we turned a simple normalized data model into one…

How Square Uses Deep Learning to Provide Exceptional Customer Service

The Problem: Organizing Square Support Center Articles

As we get closer to Christmas we’re going to be seeing more and more features for Ruby 2.6. Some of them haven’t had much writing yet…

A good problem to have: Scaling up the Cash App databases with Vitess.