[t90fan]

Spring (normal or boot) MVC, mostly.

Or Jax-RS/Jax-WS with Jersey/CXF/whatever, if you want to stick to standard EE technologies.

95% of our stuff is Java/Spring (big SOA, banking sector). ESB/Gateway is normally Mule or Camel.

[chebum]

do you have experience with other stacks (e.g. Play, Node, Ruby)? What's your experience with them?

[t90fan]

We used Python with Django (and django-rest-framework) in my old (non-financial) shop, and it was fine.