The two things I ever enjoyed that is some kind of programming was building a pipeline in shell to process data and for the last almost 5 years writing Clojure and ClojureScript. We are now 4 guys writing Clojure with 30+ years of Clojure experience added together. I participated as a co-founder in a front-end heavy project in Clojure/ ClojureScript and more than a year ago started a Clojure-preferring consultancy in Prague, Czechia. For stuff like Inter-dealer broker trading system it's a no-brainer. For many other things as well. Even for distributed systems/ higher level infrastructure stuff it might be a good choice to get going at least.