Realtime Chat Backend

Build the backend for a group chat: presence, delivery receipts, and history that paginates correctly.

By CodeCraft Academy

The brief

Build the backend for a group chat: presence, delivery receipts, and history that paginates correctly. The brief is deliberately incomplete — you make and justify the tradeoffs.

Deliberately ambiguous — you make and justify the tradeoffs. Your work is checked against a held-out evaluation you can't see in advance.

Milestones & mentor checkpoints

How you're graded