I would recommend that you definitely look into Scala. The language that was fundamentally designed to be "scalable" with and/for frameworks. Check this resource for more information.

- https://scalameta.org/

- https://speakerdeck.com/itakeshi/metaprogramming-in-scala-th...

- https://geirsson.com/post/2016/02/scalameta/

- https://github.com/milessabin/shapeless

- https://vimeo.com/217863345