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High Level Design

1. Follower Service​

Graph-Db is used to maintain follower-followee like relationship data.

Follow-Service

2. Create a post​

Since, Feed is requested by user more frequently, therefore we will update feed of all the follower whenever the user creates a post.

For media uploads, pre-signed url service is used, that provides pre-authenticated url to the user to upload the media directly to Object-Storage, then afterwards, the user will only send the media-url to post-service for creating the post.

Follow-Service

3. Read News-Feed​

CDN will be used to pull static media.

Follow-Service

4. Post-interaction [Likes/comment]​

Added an additional notification service to notify the post-owner

Follow-Service

For excalidraw file, click here to download