Case studies
Real-company deconstructions with citations to public engineering blogs, conference talks, and papers. Unlike static PDFs, every diagram here is interactive and can be rewired.
Netflix Streaming — how ~250M subscribers watch ~1B hours a day
How Netflix delivers video at global scale using Open Connect (ISP-embedded CDN), adaptive bitrate, chaos engineering, and multi-region active-active for the control plane.
~250M subscribers · ~1B hours/day · ~15% of global internet downstream traffic at peak
ReadUber Dispatch — matching riders to drivers at planetary scale
H3 hexagonal geo-index, DISCO batch matching, and surge pricing — a real-time marketplace serving 10K+ cities and ~28M trips/day.
~1M+ drivers online at peak · ~28M trips/day · <2s match latency
ReadWhatsApp — 100B+ messages a day on a small team
Erlang, fan-out, presence, and the discipline of doing one thing well.
~2B users · 100B+ messages/day
ReadGoogle Search — crawl, index, and serve at web scale
Crawler, inverted index, PageRank, freshness, and the serving stack.
Trillions of pages · billions of queries a day
ReadDynamoDB — Amazon's leaderless key-value store
Consistent hashing, quorum reads/writes, and gossip.
Multi-region · trillions of requests a month
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