Is Node developer role real?

Been searching for nodejs/nestjs dev roles but rarely found any. I wanna polish my backend dev skills for now. What should i do to stick to backend profile? Add maybe springboot? Or python or just focus on js/ts for now.

Does nodejs developer role really exist or it is just on paper? If yes then is it low paid becaise of abundance of devs?

PS: I have only 1 year experience as a node dev. But i work at a startup so learnt a lot. Wanna switch out of the fear of same day layoffs.