Blog
System Design at Instagram
System Design at Instagram
Instagram serves billions of daily interactions on top of an enormous social graph, where every photo, like, and comment needs a globally unique ID at sub-millisecond cost. Interviews focus on ID generation at scale, social feed delivery, photo storage and fan-out, and the foundational primitives that make Instagram-level read traffic possible.
1 guide available•Interview focus: Distributed ID generation, social feed delivery, photo storage, and read-heavy social platforms.
Instagram System Design Interview Guides
Dec 23, 2025•20 min•
medium
How to Design a Distributed ID Generator - Complete System Design Guide
Master distributed ID generator system design for your next big tech interview. Covers why auto-increment fails at scale, UUID trade-offs, Snowflake's 64-bit st...
Ready for Your Instagram Interview?
You've read the guides — now practice delivering these answers under time pressure. Get AI-powered feedback on system design questions commonly asked at Instagram.
Free tier available • AI-powered feedback • No credit card required
Explore Other Companies
Engineers who interview at Instagram also prepare for these companies: