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System Design at Meta

Blog

System Design at Meta

Meta (Facebook) interviews focus heavily on social graph systems, real-time messaging, content delivery at scale, and feed ranking algorithms. Their system design rounds test your ability to design products used by billions of people daily.

14 guides available•Interview focus: Social feeds, messaging systems, content delivery, real-time features, and collaborative tools.

Meta System Design Interview Guides

Dec 25, 2025•22 min•
hard
How to Architect a Metrics Monitoring and Alerting System - Complete System Design Guide
Master metrics monitoring and alerting system design for your next big tech interview. Covers time-series data modelling, pull vs push ingestion, TSDB internals...
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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...
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Dec 20, 2025•22 min•
hard
How to Design a Real-Time Collaborative Editor like Google Docs - System Design Guide
Master collaborative editor system design for your next big tech interview. Covers Operational Transformation vs CRDTs with the math explained, WebSocket archit...
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Dec 18, 2025•20 min•
hard
Android System Design: Design Reddit
A complete Android system design guide for designing Reddit — focused on what real interviews actually ask. Covers architecture, infinite feed with Paging 3 and...
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Dec 8, 2025•18 min•
medium
How to Design a Pastebin Service - Complete System Design Guide
Master Pastebin system design for your next big tech interview. Covers unique key generation approaches and their trade-offs, content storage in object storage ...
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Nov 28, 2025•22 min•
hard
How to Design a Real-Time Messaging System - Complete System Design Guide
Master real-time messaging system design for your next big tech interview. Covers WebSocket connection management, cross-server message routing with Redis Pub/S...
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Nov 25, 2025•20 min•
hard
How to Design a Content Delivery Network (CDN) - Complete System Design Guide
Master CDN system design for your next big tech interview. Covers Anycast vs DNS-based routing, PoP architecture, multi-tier cache hierarchy, push vs pull CDNs,...
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Nov 20, 2025•20 min•
hard
Android System Design: Design a Photo Sharing App
A complete Android system design guide for designing a photo sharing app like Instagram. Covers Clean Architecture, image loading with Glide vs Coil, multi-laye...
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Nov 18, 2025•22 min•
hard
Android System Design: Design Uber's Mobile App
A complete Android system design guide for designing Uber's mobile app — written in a conversational interview style. Covers Clean Architecture, real-time locat...
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Nov 15, 2025•20 min•
hard
How to Design a Distributed Metrics, Logging and Aggregation System
Master distributed metrics and logging system design for your next big tech interview. Covers push vs pull collection, Kafka ingestion pipeline, time-series dat...
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Nov 10, 2025•18 min•
medium
How to Design Google Calendar - Complete System Design Guide
Master Google Calendar system design for your next big tech interview. Learn database schema design, the right way to handle timezones, how recurring events act...
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Nov 4, 2025•22 min•
hard
Android System Design: Design a Notification Library
A complete Android system design guide for designing a notification library. Covers library API design, FCM push pipeline, BroadcastReceiver, Android Notificati...
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Oct 20, 2025•22 min•
hard
How to Design Instagram / a Social Feed - Complete System Design Guide
Master Instagram and social feed system design for your next big tech interview. Learn the hybrid fan-out approach, how Instagram's real tech stack works, feed ...
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Oct 10, 2025•20 min•
hard
How to Design a Chat System (Real-Time Messaging) - Complete System Design Guide
Master chat system design for your next big tech interview. Learn WebSockets, message delivery guarantees, Cassandra schema design, fan-out for group chats, pre...
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