Initial phone screen by hiring manager, general questions about professional history, technology stacks used. Be prepared to talk about what you're doing in the development community outside of work, what you're reading, what upcoming tech you're really excited about... Next was a general programming screen with an engineer. Nothing too complex here, but be aware that your JavaScript skills should be fairly strong. If you don't understand variable scoping, immutability best practices, scope closure, etc., start studying. Finally, on-site interview was scheduled. 8 interviewers, 2 at a time, one hour sessions. Be prepared to explain everything from the less commonly used CSS selectors, to the usual JS gotchas - prototypal inheritance (and how a prototype chain functions), lexical scope, mutability, parse time vs. run time - the whole lot. All in all, the interviewers are informal, and are interested in your mind - your thought process and general approach to programming, how you solve problems. Ask plenty of questions, and explain your thinking as you go.

Consisted of a phone call with some typical tech screen questions. Was invited to on-site interview which lasted about 3 hours and met with 6 team members. Met with 1 manager, 2 devs, 2 devs, and 1 manager. My advice would be to feel comfortable ask a lot of questions. Oh and be prepared to white board. I don't know any developers that white code at work, but hey, I guess that's the new "thing" for interviewing now because x,y,z do it, so everybody else should. You should also be a very advanced JS developer. Seemed like a cool company and office space. Everyone I met was very nice and seemed like they would be enjoyable to work with.