Looking for a quick prototype of mobile friend discovering service (iOS swift app + Redis-based Erlang backend). You don't need to do any gameplay, graphics, or UI. ... In the backstage, ThisApp is sending user's location information (latitude, longitude, confident radius of location, wifi ssid, IP) to the backend server to discover the friend nearby the user.
2. A Erlang-based backend-server, which stored every user's location information in the Redis database.