I am a fullstack developer.Most of the work i've done involve php and mysql,so i've got more experience on those.Nature of work has however made me work with other languages,like nodejs,javascript/jquery.I played around with python when learning embedded systems,but of late it has proven its usefulness in building web scraping applications. I also have some experience with nosql databases(scales well).
I particularly like the dynamic nature of fullstack development - i love the challenge of a full system development,from the backend,REST API endpoints to finally frontend(mobile app or website),and ensuring they play nicely together.
so whether it is breaking up your classic monolithic application into microservices, need a redesign of a system so that it scales well,deploying your application to cloud or just adding payment system to your application/website(like Mpesa for Kenya),am sure we can always work something out.