https://github.com/systemdesign42/system-design

Building the best system design resource in the internet

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Case Studies

• How Uber Computes ETA at Half a Million Requests per Second
• How Canva Supports Real-Time Collaboration for 135 Million Monthly Users
• How Disney+ Hotstar Delivered 5 Billion Emojis in Real Time
• How Hashnode Generates Feed at Scale
• How Cloudflare Was Able to Support 55 Million Requests per Second With Only 15 Postgres Clusters
• How Uber Finds Nearby Drivers at 1 Million Requests per Second
• Virtual Waiting Room Architecture That Handles High-Demand Ticket Sales at SeatGeek
• 5 Reasons Why Zoom Was Able to Support 300 Million Video Calls a Day
• How Does Netflix Work?
• Wechat Architecture That Powers 1.67 Billion Monthly Users
• How Shopify Handles Flash Sales at 32 Million Requests per Minute
• How LinkedIn Scaled to 930 Million Users
• This Is How Airbnb Adopted HTTP Streaming to Save 84 Million USD in Costs
• How Giphy Delivers 10 Billion GIFs a Day to 1 Billion Users
• How LinkedIn Adopted Protocol Buffers to Reduce Latency by 60%
• This Is How Stripe Does Rate Limiting to Build Scalable APIs
• Tech Stack Evolution at Levels fyi
• How Disney+ Hotstar Scaled to 25 Million Concurrent Users
• 11 Reasons Why YouTube Was Able to Support 100 Million Video Views a Day With Only 9 Engineers
• Amazon Prime Video Microservices Top Failure
• This Is How Quora Shards MySQL to Handle 13+ Terabytes
• 8 Reasons Why WhatsApp Was Able to Support 50 Billion Messages a Day With Only 32 Engineers

Fundamentals

• Cell Based Architecture
• How to Scale an App to 10 Million Users on AWS
• Hinted Handoff
• Consistency Patterns
• Gossip Protocol
• Service Discovery
• Consistent Hashing
• How Discord Boosts Performance With Code-Splitting
• Microservices Lessons From Netflix
• Top 5 Caching Patterns
• Micro Frontends
• Actor Model

Data Structures

• Quotient Filter
• Bloom Filter

Deep Dives

• Slack Architecture
• Distributed Counter
• Real Time Presence Platform
• Real-Time Live Comments
• Real-Time Gaming Leaderboard
• Pastebin
• URL Shortener

Miscellaneous

• Back of the Envelope
• How to Troubleshoot if You Can’t Access a Particular Website?
• What Happens When You Type a URL Into Your Browser?
• System Design Interview Cheat Sheet
• 6 Proven Guidelines on Open Sourcing From Tumblr
• Tumblr Shares Database Migration Strategy With 60+ Billion Rows
• Software Engineer Interview Learning Resources
• 7 Simple Ways to Fail System Design Interview