Avoiding Circular Imports in Python

Here’s some practical advice that might help you avoid circular…

Building backend services with Kotlin

Programming language selection can be subjective and often…

Why Brex Chose Elixir

The reasons why Brex picked Elixir to build a credit card system.

Almost every engineer that starts at Brex asks, “Why are we using Elixir?” It’s a question with an interesting answer, and one that we thought a lot about…

Kubernetes Rolling Update and Termination Grace Periods

Building a rewards platform from scratch

The design decisions that led us to build our rewards platform from the ground up.

Brex is launching rewards today. This post aims to go over the design decisions that we made to…

How We Built a (Mostly) Automated System to Solve Credit Card Merchant Classification

Debugging and preventing memory errors in Python

A Transaction’s Journey through Brex

Brex is re-imagining B2B financial products, starting with a corporate card for technology…

Building Brex Instant Payouts

We recently launched Instant Payouts — a new feature that shortens the time it takes for our customers to…

Elevating Security Alert Management Using Automation