Always been a huge fan of Segment. At one point I think I had a tiny little mention on the Readme of their Ruby client for fixing an issue w/ Unicorn. I jumped head first into event sourcing after their blog post demonstrating how overkill websockets are most of the time. I consider them to have their shit together.

Then I applied to become an engineer there and had one of the worst experiences of my life with a project. The project involved building a clone of their realtime event debugger with React. I really felt as though I had knocked it out of the park... I even used their Evergreen UI framework. All I got was a very brief thanks but no thanks kind of reply that left a very bitter taste in my mouth.