> Do you think working at a FANG would make you a better developer?

No, but I do expect any reasonably competently run company to figure out that the person they hired isn't actually able to do their job, especially after 7 years. I was also under the impression that this company actually did coding challenges as part of their interview process, yet this person managed to slip through their interview process. On the other hand our approach to just talk about programming in general terms seems to spot this type of candidate pretty quickly.

One of our most used questions is to ask people to tell us about something they don't like in a language or tool (one the candidate is very familiar with or enjoy using). It's pretty hard to imaging even a senior Java who doesn't have some pet pew about the language.