Python. Works for nearly everything I need. I mostly write small helper tools (most of them shared under a FOSS license) and for my job, I developed a backend API server which sits behind a web application. I also use Python for scientific math stuff as nearly every Matlab also exists for Python.

I did use Perl a lot before but in my opinion Python took over the role of Perl. I loved Perl for having a module for just about everything but nowadays most Perl modules are unmaintained and you find the “good stuff” for Python.