Well, everyone is of course entitled to her own experience, but for what it's worth I think Booking has been one of the most interesting place I've seen, not i

Well, everyone is of course entitled to her own experience, but for what it's worth I think Booking has been one of the most interesting place I've seen, not in small part because of how data driven they are, as opposed to myth driven like most IT business/people. One of their mantra was indeed "we are not an IT company", which I came to understand as "we don't want to hear about how things ought to be done. We do not bow to best practices. We rely on measurements not culture". After a few years in a big corporation where you couldn't change more than 3 lines of code without 2 code reviews and approval from 2 managers, without ever considering the customers or the final product, moving there was such a relief! Usage of a runtime typed, interpreted language for so many loc in production was of course concerning (esp. Perl which syntax and semantic are sometime surprising), but the attitude considering of caring more about measuring and controlling every possible effect than following the best practices of the day is invaluable. This is definitively a place I would recommend to any engineer willing to learn.