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39End-to-end architecture problems
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90Design patterns & practical code
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59Deep dives into core tech
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35Production systems & operations
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51TCP, HTTP, TLS, DNS & more
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38Consensus, replication & more
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84Kernel, networking & system calls
Cheat Sheets
24Quick reference cards for interviews
Recent Posts
System Design: Job Scheduler (10M Jobs/day, DAG Dependencies, Effectively-Once Execution)
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Apr 12, 2026 · 68 min
System Design: URL Shortener (10B Short URLs, 100K Redirects/sec)
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Leadership
DirectorBuilding Technical Vision
“A good technical vision covers a 2-3 year horizon with concrete milestones every 6 months”
Org Design
GrowthData Team Organization
“Data engineering, data science, and analytics engineering are three distinct disciplines with different skills, tools, and career paths. Lumping them together under 'the data team' guarantees that at least one group gets neglected”
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27Interactive Tools
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Learning Path
Discover Today
TiKV
Distributed key-value store that delivers transactions without giving up range scans
Linkerd
Built on linkerd2-proxy, a purpose-built Rust proxy that uses roughly 30MB per sidecar compared to Envoy's 100MB. Smaller memory footprint, fewer moving parts.
Operational Transformation
OT lets multiple users edit the same document simultaneously by transforming each operation against every concurrent operation before applying it. The transform adjusts character positions so that every client converges to the same final document, even when edits arrive out of order