Design an Instagram-Style Social Feed

Company: Meta

Role: Software Engineer

Category: System Design

Difficulty: medium

Interview Round: Onsite

Quick Answer: A Meta software-engineer onsite system-design question: design an Instagram-style social feed (photo/video sharing with a personalized home feed). It tests scalable, highly available feed design — hybrid fanout, data modeling, media storage and CDN delivery, caching, sharded counters, rate limiting, privacy/authorization, and a security deep-dive on pre-signed-URL uploads.