The whole process was rather uncoordinated and sad really. I guess this comes with being a fledgling startup. There was a screening interview via phone followed by, ahem, a 'technical' phone interview. The interviewer was changed twice, followed by what turned out to be a joke of a technical interview. There were a few of red flags that I noted. The resident data scientist (the interviewer) was a PhD from a low rung school with a poor publication record and a non-existential presence on github. And well, the quality of the questions reflected these traits. PS: A humble advice to the interviewer: Prepare before you interview someone! There are a dozen data scientist books out there.