Begins with an API coding challenge that is take home. Next round includes javascript questions (know your prototypes, caching, memoization, 'this' usage, etc), coding challenge (mine was merge two lists and refinement on the algorithm), and System Design. I didn't make it past this part. Recruiter called a few days later and we went over feedback. I jumped into the system design before asking enough questions which I think had to do with my nerves around the interview as a whole. Amazing that they actually entertain the idea of giving you feedback. I don't know another company that does this. Recruiter said they often re-evaluate candidates after 12-14 months but because of how well i did in the other areas they would look at me in another 10-12 months. Better than nothing, I suppose. Overall a good experience.