Basically, anything written in Elixir Phoenix, or erlang, so: Discord, Pagerduty, Bet365, the entire NHS. If you're a startup, in SF, there's a good chance your payments goes through Brex. You might be using Slab for your documentation, you might use Boston's MBTA, etc. Probably a not-insignificant chunk of what you do as a startup at some level depends on a framework that uses linkedlists. Do you use RabbitMQ or Riak? Linked lists are the primary list datatype for that system.
