Social Media Platform

Build a production-grade social platform with user profiles, following, content creation, comments, reactions, messaging, media uploads, search, and moderation. Define clear boundaries for identity, social graph, content, messaging, notifications, and media processing. Include role-based moderation tools, abuse-report handling, rate limits and anti-spam controls, resilient processing for feed fan-out and media transformation, observability for notification and delivery pipelines, privacy controls for account visibility, and a strategy for scaling read-heavy feeds without losing auditability or safety controls.