Applied at career fair, brief screen next day with simple algorithms problem. Invited for an onsite, talked to a guy via teleconferencing about my general experience with code and science, he said I was skilled. Technical interview - 90 minutes to write up an easy-ish problem, with full internet access, though I had a silly bug midway through which cost me time. Then spent a while interacting with the employees and eating, they said I'd fit in well. In the end there was no offer but I am not sure why as everything seemed so positive?

I was asked to explain science things that had nothing to do with code, which confused me, but afterward the guy said he was testing how well I could teach.