>Full stack means you can build a web based app alone, that involves databases, backend, server management (this one is arguable), frontend development and design. No need to go lower really.

I mean I can do that but some parts of that stack will be more sophisticated than others.

Oh, and I designed an UI for my smartwatch OS. For which I wrote everything from the ground up.

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.