I know the back end is less sexy, but can you tell us something about which database you're using and what code the server component is based on?asked by Timonis

I can tell you a little about that. We really should have programmers here, and they'd probably talk your ear off about it. So we're using a clustered Cassandra database, which is the back end. And we are using NoSQL, for those of you who are curious. So it's not a relational database. There you go. For the nerds out there.