imho. * java - it's very heavily used in enterprise and somehow becomes "the new cobol" - jobs may be often a bit boring, but they pay :) * kotlin - mobile/an

imho. * java - it's very heavily used in enterprise and somehow becomes "the new cobol" - jobs may be often a bit boring, but they pay :) * kotlin - mobile/android development and integrates well with java * python - used everywhere from scripting, webapps, ml to hpc; lots of good libraries around ... even if they are often just wrappers around fortran/c code a la scipy/numpy * c - yes, c ... because its the "workhorse" of system/embedded programming; simple and you get full control over your system * javascript - because its everywhere nowadays ;) * why not php!? personally i used php since php3 (!) and still use it for quick projects / the occasional webpage where a static site-gen is not enough, but i avoid jobs using/announcing php, because those projects are often utterly crap ... cheers v. ps.: don't forget to learn the language-specific tooling ...