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Pattern Pick
Binary Search on Answer
DSA TemplateIntermediate
ExploreDesign Blueprint
Concert Ticket Booking
Low Level DesignAdvanced
ExploreScale Study
Design a Metrics Monitoring System
System DesignMedium
Deep divePacket Probe
OSI Model — The Real Version
Networking & ProtocolsBeginner
ExploreStaff+ Prep
Technical Strategy Presentation
Staff+ InterviewExpert
ExploreKernel Dive
XDP & AF_XDP: Kernel-Bypass Networking
Linux InternalsAdvanced
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DSA Templates
35Algorithm patterns & code templates
System Design
41End-to-end architecture problems
Low Level Design
90Design patterns & practical code
Key Technologies
59Deep dives into core tech
Infrastructure
35Production systems & operations
Networking & Protocols
51TCP, HTTP, TLS, DNS & more
Distributed Systems
38Consensus, replication & more
Linux Internals
84Kernel, networking & system calls
Cheat Sheets
24Quick reference cards for interviews
Recent Posts
System Design: GitHub (200M Repos, Git Object Storage, Sparse Trigram Code Search, Per-Job VM CI)
System Design
Apr 23, 2026 · 69 min
System Design: Online Auction (50K Bids/sec, Effectively-Once Settlement, Anti-Sniping)
System Design
Apr 17, 2026 · 83 min
System Design: Job Scheduler (10M Jobs/day, DAG Dependencies, Effectively-Once Execution)
System Design
Apr 15, 2026 · 61 min
Leadership
ManagerSecurity Culture Building
“Shift-left security works only when security tooling integrates into existing developer workflows, not alongside them”
Org Design
GrowthConway's Law & Inverse Maneuver
“Conway's Law says your system architecture will mirror the communication structure of the org that builds it. This isn't a suggestion. It's just what happens.”
530+Articles
27Interactive Tools
16Categories
6Learning Stages
Learning Path
Discover Today
TiKV
Distributed key-value store that delivers transactions without giving up range scans
Hot, Warm & Cold Data Tiering
Not all data deserves the same storage. Hot data sits in memory or NVMe SSDs, warm data on cheaper SSDs, cold data on object storage. The cost difference between tiers is 100x
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