advancedNotification Systems23 of 132
Design a Notification Service (real one, in the shape of Klaviyo) — implement in executable code
Tests whether you can translate a template/segment/trigger model into working code with a queue-backed fan-out and per-channel adapters, not just a component diagram with boxes labeled 'email service'.
Ready to design this system end to end?
Generate a complete, structured system design answer — requirements, capacity estimation, API design, architecture, database choice, scaling, caching, fault tolerance, security, trade-offs, and more, walked through the way a strong senior engineer would in a real interview.
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