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Practice: Notification System
Send push, SMS and email notifications from many internal services reliably, with priorities, rate limits and user preferences.
45-minute interview simulation
You will move through 7 stages, each with a time budget. Type your answer as you would say it out loud. The reference answer is hidden until the review. Going over time is allowed, but it is tracked.
- Requirements — 5 min
- Back-of-envelope estimates — 5 min
- API design — 5 min
- Data model — 5 min
- High-level design — 10 min
- Deep dives — 10 min
- Trade-offs & wrap-up — 5 min