You should revise your Redis max connections setting

Active Record, Sidekiq, pools and threads

At Appaloosa, we use Sidekiq a lot. In fact, we use it for all the background jobs we…

Caution when using before_destroy with model association

The other day, I was tasked with calling an external service when destroying a user. This kind of task is pretty straightforward in Rails, you call a method in a before_destroy callback on your model.

Continuous Integration with Android

In Appaloosa’s search for continuous improvement, we decided a while back that it was about time to make big efforts to give our Android app and its 8k+ daily users the care they deserved.
2016 was a major year for our Android native store: as the team got bigger, we…

Migrating our analytics stack from MongoDB to AWS Redshift (1/2)

Ruby memory, ActiveRecord and Draper

At Appaloosa we often process CSV. When we process thousands of CSV lines of users that need to…

Codeless API reshaping with AWS API Gateway

“Client-specific needs”