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Pattern Pick
Cycle Detection (Graph)
DSA TemplateIntermediate
ExploreDesign Blueprint
Notification System
Low Level DesignIntermediate
ExploreScale Study
Design an Online Auction
System DesignHard
Deep divePacket Probe
gRPC & Protocol Buffers
Networking & ProtocolsIntermediate
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Engineering Hiring & Team Building
Staff+ InterviewAdvanced
ExploreKernel Dive
Virtual Memory & Address Spaces
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Deep dive
Explore
DSA Templates
35Algorithm patterns & code templates
System Design
39End-to-end architecture problems
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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: Job Scheduler (10M Jobs/day, DAG Dependencies, Effectively-Once Execution)
System Design
Apr 15, 2026 · 61 min
System Design: LeetCode (Code Sandbox, Container Isolation, Real-Time Contests)
System Design
Apr 12, 2026 · 68 min
System Design: URL Shortener (10B Short URLs, 100K Redirects/sec)
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Apr 11, 2026 · 42 min
Leadership
VPCommunicating Strategy to Execs
“Lead with business impact. Executives care about revenue, risk, and velocity, not which technology you picked”
Org Design
GrowthEngineering Career Ladders
“IC and management tracks should run parallel in seniority and comp. A Staff Engineer and an Engineering Manager should be peers, not one reporting to the other”
530+Articles
27Interactive Tools
16Categories
6Learning Stages
Learning Path
Discover Today
Tile38
The real-time geospatial database built for tracking things that move
Load Balancer
Distributes incoming traffic across multiple backend servers to prevent overload
Paxos Consensus
Paxos is the original solution to distributed consensus. Leslie Lamport published it in 1998 (written in 1990), and every consensus algorithm since then, including Raft, Zab, and Viewstamped Replication, is either a variant of Paxos or heavily influenced by it