Design a Discord-Style Communication Platform
Company: Onepay
Role: Software Engineer
Category: System Design
Difficulty: easy
Interview Round: Technical Screen
Overview: Design a Discord-style platform with organizations, channels, direct messages, membership, and real-time text delivery. Cover durable history, permissions, ordering, reconnect catch-up, partitioning, hot channels, partial fan-out, stale authorization, observability, and ephemeral follow-up features.