by Gherman Sokolov
This is API. It's frontend on React is here:
https://github.com/germansokolov13/react-demo-app
The app is meant purely as a demo for potential employers and that's why it's considerably over-engineered for its real size
(i.e. implements things it could probably live without).
It is made for theoretical assumption of high load(many concurrent users) with possibility running in clusters.