System Design

Design a notification service.

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1 answer published. Last candidate submission on Nov 29 2025, 3:46am PDT. Interview question asked to Engineering Managers, Site Reliability Engineers, Machine Learning Engineers and other roles interviewing at PhonePe, Wish, Duolingo and other companies. Original question asked: Design a notification service.. Question last reported by a candidate interviewing at Blizzard for an Engineering Manager interview on Aug 1 2026, 8:50am PDT.