CrackingWalnuts
Explore
DSA Templates
35Algorithm patterns & code templates
System Design
38End-to-end architecture problems
Low Level Design
67Design 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: News Aggregator (100K Sources, Dedup, Personalized Ranking)
System Design
Apr 5, 2026 · 86 min
System Design: Dropbox (File Sync, Chunking, and Deduplication)
System Design
Apr 2, 2026 · 69 min
System Design: Object Storage (Erasure Coding, Flat Namespace, and Exabyte Scale)
System Design
Mar 31, 2026 · 54 min
Leadership
DirectorBuilding Technical Vision
“A good technical vision covers a 2-3 year horizon with concrete milestones every 6 months”
Org Design
GrowthTeam Topologies Overview
“Four team types form the backbone of this framework: stream-aligned, platform, enabling, and complicated-subsystem. Each one serves a specific purpose and has its own ownership model.”
530+Articles
27Interactive Tools
16Categories
6Learning Stages
Learning Path
Discover Today
TiDB
MySQL-compatible distributed database that actually handles both OLTP and OLAP
Service Mesh
A dedicated infrastructure layer that handles service-to-service communication through sidecar proxies
Chord & Distributed Hash Tables
A Distributed Hash Table (DHT) maps keys to nodes in a decentralized network with no central coordinator. Any node can look up any key by routing through O(log n) intermediate nodes, even in a network with millions of participants