System Design

Design a system for real-time recommendation engine.

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1 answer published. Last candidate submission on Jun 15 2026, 6:37am PDT. Interview question asked to Technical Program Managers, Site Reliability Engineering Managers, Machine Learning Engineers and other roles interviewing at DuckDuckGo, BuzzFeed, Lenskart and other companies. Original question asked: Design a system for real-time recommendation engine.. Question last reported by a candidate interviewing at Soundcloud for a Production Engineer interview on Jun 13 2026, 6:34pm PDT.