I do like the basic (pun intended) idea you are proposing, but for platform-independence I always choose Java. The required runtime is available for a gazillion different OS's. And Java is very well known programming language across the industry, so anyone else after me can pick up maintenance/extension at will, without having to learn this new, esoteric, programming language, install required tools, runtimes, etc... :o

I prefer the free, manufacturer supplied, Brother iPrint & Scan solution, available for my Brother Multifunction machine (not a very sophisticated model, but it works good enough for the minimal use here), providing access to both the print and scan features of that Multifunction. It is only usable from the local network though, but that's all I need (or want, for that matter).
Works equally well across Windows, Android and iOS.