I remember coming across the Django part of the project a while ago and thought it was quite nice and pretty. Neither over-engineered nor under. https://github.

I remember coming across the Django part of the project a while ago and thought it was quite nice and pretty. Neither over-engineered nor under. https://github.com/zulip/zulip/tree/master/zerver/lib https://github.com/zulip/zulip/tree/master/zerver/lib