I mostly use RoR+Javascript for web dev, Python for data analysis and ML and C++ for image processing. And all that most of the time on AWS instances and tools.
I'm also experimenting a lot to (try to) stay up to date :)

I'm learning React and trying to get into some functional languages (Haskell...) and Go through the blog processor Hugo.

My new blog http://theworldasastage and applying improvisational theater to make my team more efficient and creative.

If you want to know more about improvisation used in a dev team, we can have a chat. And if you come to Barcelona we can have a beer!