The interview starts with being tasked to launch an app on Heroku monitored by New Relic. After that they will call to set up a phone screen. This was just a basic chat. At the end I was asked if I wanted to continue with a technical phone screen. I said sure, and a week later I had a call discussing basic troubleshooting experiencing and how I would approach different problems. If you have basic networking and coding experience you will be fine. The focus is not on grilling you for skills, but more about your approach and what you're interested in. The final interview is a half day with back to back interviews about 30 min apart, and then a lunch with current employees.