I had a coding assignment to make a small module, which led to a phone conversation with a manager. There was then an on-site interview for about 3 hours where we pair programmed an exercise on the front and back end with Node/Express and ReactJS. I wasn't fully expecting the React portion but it was welcome and we happily moved through it. The team was really welcoming and accepting of the fact that I may need to look at documentation for Express/React to make sure I was using either of them correctly, and the challenge was fun. We wrapped up a couple of days later when I had an hour long culture call with the VP of Engineering.