Papercup.AI Machine Learning Researcher interview questions

Three stage interview via Zoom. First a one hour technical coding task in a Jupiter notebook, second a free form technical ML interview and third a culture interview. At the end I got rejected because of a lack of theory. Everyone during the interview process was very nice and the overall experience was pleasant. It seems important to talk concretely about ML theory in the second part of the interview even though it does not really fit the free form nature of the discussion.