Design a Slack-like real-time messaging system
Company: OpenAI
Role: Software Engineer
Category: System Design
Difficulty: hard
Interview Round: Technical Screen
Overview: This question evaluates a candidate's competency in designing scalable, fault-tolerant real-time messaging systems, including message persistence and delivery semantics for DMs and large channels, multi-device synchronization, ordering guarantees, and operational concerns like partitioning and latency targets.
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