File Storage System Design
Distributed file storage services such as Dropbox/Google Drive System Design
Messenger App System Design
Messaging systems like WhatsApp/Facebook Messenger
Redis GeoHashing
Redis geospatial indexes let you store coordinates and search for them. This data structure is useful for finding nearby points within a given radius or bounding box.
How Snowflake Ids are unique
Snowflake IDs, also known as snowflakes, are a type of unique identifier used in distributed computing to create time-ordered IDs