I do not know for actual employment but the freelance thread works quite well for contracting jobs. I also had positive experience contacting commenters directl

I do not know for actual employment but the freelance thread works quite well for contracting jobs. I also had positive experience contacting commenters directly when they mention a project they are working on and/or that they may need help. (of course, don't just spam people commenting, only contact the person if you feel there is an opportunity for a genuine work relationship)