500+ Page System Design Repo
A massive free GitHub repo (500+ pages) covering system design essentials—scaling to millions, rate limiting, chat systems, feeds and more—was spotlighted as a comprehensive alternative to paid prep materials. It’s framed as a practical, open‑source study compendium for FAANG aspirants. (x.com)
Donnemartin’s repository "system-design-primer" is one of the most-starred system-design resources on GitHub with about 341k stars and roughly 55.1k forks. (github.com) The repo contains a dedicated solutions directory for system-design and object-oriented problems, ships an Anki flashcard deck, and includes a generate-epub.sh script so contributors can build offline EPUB/PDF editions. (github.com) Concrete case studies listed in the README and solutions pages include a URL shortener, Twitter timeline/feed design, web crawler and Pastebin-style storage, each with HLD/LLD notes and scaling considerations. (system-design-primer site and README) (phucnguyen81.github.io) The project maintains translations (Japanese, Simplified Chinese, Traditional Chinese among others) and a TRANSLATIONS.md workflow to coordinate contributor-driven localization across multiple languages. (github.com) Multiple community roundups and guides surface this repo as a free alternative to paid system-design courses, and related curated collections like ashishps1’s "awesome-system-design-resources" (≈35.7k stars) are commonly cross‑recommended. (github.com) The repository shows active maintenance with recent commits addressing link fixes and translation updates in the past few months, and its README includes tooling to generate an eBook and integrate solutions for interview practice. (github.com)
