I've been paid to write perl in a team maintaining high-volume web properties and internal APIs for a large telco, and I also spent a few years in a Bioinformatics role which used it a fair bit at a national science agency (the research community in that particular corner of the discipline had some pretty awesome tools/libraries written in perl, but the full gamut of stuff we used also included ruby, python, R, C, Fortran...)
Just a few days ago I wrote how I missed Perl's Moose OO framework now that I'm doing mostly Python [1] [2], and that interestingly it's this that has prompted me to think more seriously about using a more strongly/statically typed language for large projects in future.
[1] https://news.ycombinator.com/item?id=8627143 [2] https://news.ycombinator.com/item?id=8627819