Become a programmer, write the code for the burger-maker machine, and also get your electrician’s certification so you can install and troubleshoot them.
If I owned a fast food restaurant, I would make it a policy that my manager was a certified electronic technician, then I would fully automate. You could run the place 24/7 with a handful of employes. One person to load the machines, one to fix them, one to keep the place clean.