[tuxychandru]

I do not know about others but I do it because not mixing up web server responsibilities with application server is a good idea. For example, I leave things like gzip compression and TLS handling to nginx without having to deal with them in my app.

[cluda01]

Using HTTP in general as an internal transport protocol has always struck me as odd. But I come from a financial services perspective where latency is the key driver.

[tuxychandru]

I use ZeroMQ or Go's RPC libraries for internal communication and mostly use nginx as reverse proxy and to serve static files on the edge.