I think PHP is also implemented in a lot of large scale apps, I've worked in some large e-commerce companies that use it as the main language. If you want to go

I think PHP is also implemented in a lot of large scale apps, I've worked in some large e-commerce companies that use it as the main language. If you want to go for bigger companies, I think they do use a lot of Java or C#. JavaScript is pretty much everywhere, Python is popular, but as a web developer, I don't get as many inquiries as PHP or JavaScript. Could be that mostly webdev recruiters contact me, but could also be regional (I'm in Germany).