We have mono run in it using hyper fast cgi.
Main UI library. We are still on 2. We have customized heavily.
We use it to run scrum and keep track of our geo located team.
Main library that we use 98% of our backend code is in .net
Main data storage, Has a secondary cache and stores our time series reports.
Cache for data we need fast. Local regions. We sync some tables with either mysql or mongo.
Deployment automation all of the websites and apps are deployed to linux via capistrano.
Configures or servers and allows us to be region independent we have 5 regions across the globe.