Designing a Content Moderation System

Summary

Architecting a system that filters harmful content at scale — combining fast rule-based filters, ML classifiers, and human review escalation paths.

• 1Practice designing a moderation pipeline with multiple filtering stages of increasing cost/accuracy.
• 2Consider the trade-off between moderation latency and thoroughness for real-time content.
• 3Think through how you'd handle appeals and human-in-the-loop review.