Design live comments with reactions and live notifications: system design question

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Design a real-time commenting system that allows users to view and post comments instantly while watching live videos or browsing posts across Meta platforms. The system should handle Facebook-scale traffic (~2B DAU) and support features like reactions, live notifications, and seamless user transitions between different content.

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Hello Interview · 7 records

Amazon
Design Facebook Live Comments
Reported May 7, 2026 · 1 source report
MID_LEVEL
Source snapshot: Nov 12, 2026
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Bloomberg
Design Facebook Live Comments
Reported Sep 1, 2026 · 1 source report
JUNIOR
Source snapshot: Nov 12, 2026
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Figma
Design Facebook Live Comments
Reported Mar 27, 2025 · 1 source report
SENIOR
Source snapshot: Nov 12, 2026
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Google
Design Facebook Live Comments
Reported Nov 24, 2025 · 1 source report
MANAGER
Source snapshot: Nov 12, 2026
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Design live comments with reactions and live notifications

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Design live comments with reactions and live notifications

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