About The Corner

Though we aim to make Square simple to use, building Square is anything but. The Square team wants to share this story with you.

We have a lot to share about algorithms, security, design, usability, open source, APIs, Ruby on Rails, Apple iOS, and Android. We’re looking forward to writing about all these topics and more.

Building a secure, reliable, user friendly payment system requires a wide variety of technologies and expertise. Square has server engineers, client engineers, designers, supporters, and experts in risk, fraud and security.

Are you passionate about these things? We’re hiring.

This is Square’s development blog, not official company announcements. Get help and report bugs at squareup.com/support.