Booking.com reviews

Everything is treated as an experiment to prove if it’s efficient in the short term. If its not, it gets discarded. This includes people too: as long as you are full of energy and initiative, things are rolling, but if for some reason you lose the heart, you’ll get replaced by someone with more energy available. So when you feel that you lose the focus, be proactive and find a way to stay motivated, or get lost. On the grander scale of things, the whole company development is the living example of how to develop a complex system using TDD approach + organic growth philosophy, with all advantages and disadvantages of that.

Very strong culture that you either like or not. This may be a drawback for some, not for me but I've seen people struggle with this. Technically you have to accept that the business comes first and that getting new features and functionality out there quickly is always more important. Code quality is never a goal in itself. Most code will be used for a very short time anyway as everything is A/B testsed and most test fail. Deploying new technology because it shiny and new is not tolerated.