System designHardsd-p101

Subject RealtimeLevel Senior–Staff~45 minCommon in Distributed systems interviewsIndustries Technology, Telecom

Question

Design a real-time video conferencing system (like Zoom) supporting multi-party calls with audio/video, screen share, and low latency.

What a strong answer looks like

Clarify scale and constraints first. Propose a clean component breakdown, then go deep on the hard parts — data model, bottlenecks, consistency, failure modes — and name the trade-offs you are making.

Learn the concepts

Narrate your design

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Run or narrate your approach, then ask the coach.