JS
Crack LLD
37 production-ready low-level design exercises in pure JavaScript. Detailed requirements, UML class diagrams, architecture diagrams, design patterns, full source code, and interview Q&A.
37
Problems
350+
Source Files
7+
Patterns
0
Dependencies
LLD Architecture
Layered class diagrams with relationships, patterns, and metrics for every problem
HLD Architecture
System-level diagrams with tiers, protocols, data flows, and scaling notes
Full Source Code
Every .js file with tabbed navigation and syntax highlighting — 350+ files
"One engineer's confusion is another engineer's clarity." — Crack LLD