I'm not a web developer - my experience is mostly with embedded systems overlapping SW & HW functional performance in avionics, industrial robotics, and medical device etc.
"Embedded systems & Robotics Generalist" sounds pretty badass to me. Technically you can even say "Embedded Systems & Robotics _Specialist_". since thats where your specializing, _not_ in web, not in angular/react, not in node/django/rails etc...
