I wouldn't look at what languages you should learn but what do you prefer to do. If it's frontend, then JS is a must-learn, and if you're coming from backend, you will love Typescript better than JS (it's JS with "types"). If you don't care about frontend you can just pick one of the backend ones, Node.js (if you already know JS), Go, Python, Java, C# etc... can all be options. Even fullstack has certain preferences, some fullstack prefer frontend more, and like to work out their custom design etc, some prefer backend more, they're more likely to use UI library or CSS framework to build their apps.
Tech Lead/Team Lead. Senior WebDev.
Intermediate Grade on Computer Systems-
High Grade on Web Application Development-
MBA (+Marketing+HHRR).
Studied a bit of law, economics and design
Location
Spain
Education
Higher Level Education Certificate on Web Application Development
I wouldn't look at what languages you should learn but what do you prefer to do. If it's frontend, then JS is a must-learn, and if you're coming from backend, you will love Typescript better than JS (it's JS with "types"). If you don't care about frontend you can just pick one of the backend ones, Node.js (if you already know JS), Go, Python, Java, C# etc... can all be options. Even fullstack has certain preferences, some fullstack prefer frontend more, and like to work out their custom design etc, some prefer backend more, they're more likely to use UI library or CSS framework to build their apps.
At the end of day, everybody gotta use a bit of JS/TS here and there
well, JS is a must, TS is optional; I mean, any JS code is a valid TS code, as TS is a JS superset 😆