Kothay Maps is a map service from Bangladesh where we support customers from Nepal and Bangladesh. I worked on this project while I was working as a software developer for Monico Technologies Ltd. Some key points -

Ability to handle 100,000 requests per minute.

Ability to serve 90% of requests from the cache, instead of calling the map driver.

Serves requests on average in 20 milliseconds.

Automatically discard caches that are one week old, to load new map data.

Python (Sanic, Django)

Database (PostgreSQL)

In Memory Database (Redis)

Docker