5. Design a Chat System
Send durable messages, reconnect devices and explain ordering and delivery receipts.
ClassicMedium
Guided practice
Start with a template. Work through each step. Ask Coach when you need a second opinion.
All designs 3
Ordered by design numberCompany tags are community-reported. Counts on cards show how many people reported that design.
PrivacyClear filters
6. Design a News Feed
Build a paginated feed that handles high-fan-out authors, fresh posts and visibility changes.
ClassicMedium- Practice briefStart with your own approach
9. Design Search Autocomplete
Return useful prefix suggestions quickly while refreshing rankings and removing unsafe entries.
ClassicMedium