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..
Savings, Selling (thing I own) and Freelance kept us alive for a long time until we first raised some money. Lots of occasions where the lights actually went out, but as old friends it was much easier for us to brush it off and keep finding ways to press on.
Hey - congrats, that is awesome (really like your landing page!). We've found the power of the community to be astounding, offers for help / feedback has been invaluable.