← System Design
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Track
Difficulty
Time available
2 prompts found
Backend System DesignSenior⏱ 60 min
Design a notification system
Design APIs and backend architecture for multi-channel notifications.
backendqueuenotificationreliability
Start 60 min session →Backend System DesignIntermediate⏱ 45 min
Design a URL shortener
High-throughput URL shortening and redirect service at 1B redirects/month.
backendcachingdatabaseanalytics
Start 45 min session →