Managers be managers, no matter if it's in retail, software or warehouses, no matter if it's Apple, Toy'r'Us or whatever. If they have something they consider an emergency and have your personal phone number, it's not super uncommon to be contacted by your boss outside of regular working hours. Repeating what last commentator said, not every boss is like this, obviously. But if you ask around in your circles (outside of software), then you'll see it's not super uncommon either.