5. Design a Chat System
Send durable messages, reconnect devices and explain ordering and delivery receipts.
ClassicMedium
Designs
Pick a system. Work through the problem. Compare your approach.
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- Practice briefStart with your own approach
15. Sync inspections from offline field teams
Reconcile conflicting edits and large photo uploads without losing submitted inspections.
Product & backendMedium 59. Design a Fitness Tracking App like Strava
Record runs and rides on the phone without signal, upload each once, show them to friends and rank athletes by week, month and year.
ClassicMedium