I am an EE, that works with microcontrollers on a daily basis. I know some html I play around with sdl and ncurses a bit, I can do some internet stuff. I am clearly a full stack dev right?
Do you have a microservices-based REST API with graphical frontend (web and Electron based) deployed/available on redundant cloud providers enabling secured, direct interaction with high- and low-level operations of your microcontrollers, such as environmental data gathering, software/firmware deployment and updates?
That's a fuller stack. I probably missed some things.
Oh, and I designed an UI for my smartwatch OS. For which I wrote everything from the ground up.
Still not quite there. You haven't mentioned whether you make pancakes or not.