If you have chaotic alignment, you'll like it. 12-hour workdays mixed with occasional periods of having nothing to do at all, no specs, no working process (or, alternatively, multiple failing attempts to go full SCRUM), hacks upon hacks upon hacks in systems processing billions per day, on-site urgent calls at 2AM, having to double as devops, internal tech support and psychotherapist...

On the upside: money and lots of interesting technologies and shiny things in the zoo.

everyone's experience is different, but usually the pain is not from long hours, but from bureaucracy, old technology and some hostile colleagues.