Hi, I'm rich the co-founder of tray.io..

There are quite a few different parts to our technology stack, and we were planning on doing a few more blog posts outlining the tech and challenges we have experienced..

For now I'll say that we are based on the jvm, using a mix of scala and java, typesafe stack, mongodb, redis, nginx, vert.x all hosted on AWS..

Great job on launching the private beta. It's a amazing switch from the previous communication play. Given most developers needs a platform to host lightweight web apps. Plus, there is a massive opportunity there to build the Heroku for mobile optimized site for mobile web or embed webviews.

Cheers

- T

What is your technology stack?