From their VP of Engineering @swstagg ’s ama

The core of the main Pusher platform is written in Ruby using the EventMachine framework. We also use Redis extensively for the internal messaging part. We picked this in 2010 because we spun out of a Ruby on Rails agency, and we never had capacity to change it 😁

In the last year we've been building a new platform built in Go to support our new products, which we're finding much more suited to building scalable distributed systems. We use Kubernetes for infrastructure management and React on our front-end.

 

Thank you for the information!! :D do you have any idea what are they using for websocket? and how they scale it with Kubernetes?

Classic DEV Post from Mar 23

Thing's I've learned so far starting an open source project - March 2019

A collection of thoughts on what I have learned so far since starting my open source game "company" this year.