C++/Qt for GUI, Go or Python for backend, Python for misc scripts/prototypes, C for uCs. They are all well trodden paths with plenty of good libraries available

C++/Qt for GUI, Go or Python for backend, Python for misc scripts/prototypes, C for uCs. They are all well trodden paths with plenty of good libraries available, and good tooling available. I have spent a bit of time playing with Zig most recently, it could finally replace C for me!