Rather non-technical, really. To the point that it makes me question their hiring process and the caliber of the people I'd be working with at this corporation.

Most companies I know of that hire decent people vet them through a series of interviews. I literally just had one in-person, somewhat technical interview (design a system, no coding).

They were nice enough to fly me out to San Jose for the interview, so I'd say overall the experience was positive.

Explain how you would design a large-scale cloud system. What things would you take into account? Scalability, backups, sharding, etc.

I told him what I knew from my limited experience of scaling, and he helped me out in certain places.