Coding challenge, several rounds of written questions and responses. After completing the last of these, there was no response. I inquired, and was told that they were reviewing my application "in great detail." No further response after that. I put quite a substantial amount of time and effort into getting these materials together, doing their challenges, reiterating answers to questions they should have already seen my answers to, etc. So far as I can tell, the effort involved on their side was basically none.