when a company asks for expert knowledge with nodejs, what exactly do they mean?

i've been learning a bit of nodejs doing mostly web apps with expressjs. i want to try to switch from front end to backend using nodejs since i already know some js. when a company asks for expert knowledge with nodejs, what specific skills are they looking for? what should i be able to do with nodejs in a production environment?thanks

Submitted March 14, 2018 at 10:14PM by desperate-1