I don't think there are many people around who get satisfaction from writting enterprise-software. In the beginning you might get some, because it was all new,

I don't think there are many people around who get satisfaction from writting enterprise-software. In the beginning you might get some, because it was all new, shiny and you had responsability and could learn new things? But now you reached the basic level of grind, and there is no fun in this. So basically you are bored. What you should do is to find something fresh, something enriching, something distracting, something valuable. Many developers have side-projects for this. Or are trying out new things. Doing this at work is a bit problematic, so you should be careful what you actually do there. But automating your work, enhancing your workflow and learning to spark up your worklife is always accepted if you get your work done. The other option to take a longer vacation. 4 Weeks, 3 Months, depends on your situation. And don't overwork yourself of course. 7-8 Hours a day is more then enough. A human can't code for longer then 4-5 hours a day without losing it anyway.