I use Clojure and ClojureScript in production. The developer experience is a real pleasure: there is good library support, libraries are typically easy to use,

I use Clojure and ClojureScript in production. The developer experience is a real pleasure: there is good library support, libraries are typically easy to use, and you can always interop with the underlying JVM/js if the need arises. Clojure also has the core.async library. This can be used along with Reagent to build React-based apps; core.async allows you to do what Redux does but in fewer lines of code. https://github.com/deckeraa/OpenStainer https://github.com/deckeraa/OpenStainer is an example of building apps this way.