It depends on the company. I have done this, and quite successfully. I don't think I'll be going back to the 40-hour week any time soon. I think you'll have

It depends on the company. I have done this, and quite successfully. I don't think I'll be going back to the 40-hour week any time soon. I think you'll have better luck with tiny companies that can be more flexible, and also tend to be more starved for engineering skill. But YMMV.