Now, I'm going to criticize Aradan's dream job. I approve of it, but.... your view doesn't go where it should. It's all about the nano, Aradan. Make nano stuff that makes nano stuff. And you have a repair protocol. False immortal confirmed. The idea is to make that small of an electronic device. The only way to engineer a human body is through nanomachinery. While, at the same time figure out how to transform atoms into other atoms. Then, you really can survive through pretty much anything if you have atoms near you.
Congrats! golden_darkness has just been created!

A real real dream job would be in the manga/anime/VN industry. Even western games would do just fine! So long as it's something you like, no?
Now, a more realistic dream job would be an R&D job in theoretical physics with added experimental physics. All that coming with a good salary.