a) 1 b) Too many to count c) 6, I think? d1) System design, performance management, product eng partnership/relationship, management principles d2) 1 e) Not really necessary

I interviewed more as a favor to someone I knew at the company, but I ended up liking the company. When it came time to talk compensation, I threw what I thought was an FU number at them (i.e. I started my then current job with a max band offer and stock had since doubled) but they ended up agreeing, so I said yes.