I'm working on iot cloud to which you can connect millions of devices (to single server) and it's very easily extensible to different device protocols (we make

I'm working on iot cloud to which you can connect millions of devices (to single server) and it's very easily extensible to different device protocols (we make a driver for each device to expose all of them in unified way). Erlang is perfect here, because it can easily support lots of connections with low latency and you don't need to restart anything when you make changes, which makes development much easier.