Sample Answer
Three specific reasons. First, your engineering blog is one of the few I follow regularly — the post on your real-time pricing system architecture was excellent, and that's exactly the kind of problem I want to work on. Second, I've used your product daily for two years and have actually filed two bug reports that you fixed. I'd love to be on the other side of that. Third, your team's writeups about taking junior engineers from intern to senior in three years tells me you invest in growth, which matches what I'm looking for at this stage of my career.