Previous devs were doing expensive things whenever we received webhooks. This meant we DoS'd ourselves every time a sizable amount of webhooks came our way.

Set up a tiny server on Heroku that received the webhooks and put them on a queue. A worker with a configurable concurrency level later forwards the events on the queue .

Dropped from four digit 502s and 504s weekly to virtually none.

It also allows you to do testing by injecting pre-cooked payloads into your queue system.