Master programming by recreating your favorite technologies from scratch.

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

📚 Freely available programming books

SWE Backend, Frontend ポジション選考課題のテンプレートリポジトリ

独学エンジニア

🔗 Some useful websites for programmers.

A collection of (mostly) technical things every software developer should know about

What the f*ck Python? 😱

Learn WebAssembly by writing small programs!

Learn where some of the network sysctl variables fit into the Linux/Kernel network flow. Translations: 🇷🇺

The Concise TypeScript Book: A Concise Guide to Effective Development in TypeScript. Free and Open Source.

12 Weeks, 24 Lessons, AI for All!

GitHub演習

Collection of TypeScript type challenges with online judge

現代の JavaScript チュートリアル

TypeScriptの入門書『サバイバルTypeScript』

🐙 Guides, papers, lessons, notebooks and resources for prompt engineering, context engineering, RAG, and AI Agents.

Examples and guides for using the OpenAI API

Redash study materials for beginners 📊

Continuous Unix commit history from 1970 until today

JavaScript Style Guide

Explain complex systems using visuals and simple terms. Help you prepare for system design interviews.

freee Accessibility Guidelines

Pythonを知っている人向けのC++入門

A description of React's new core algorithm, React Fiber

Badges for your personal developer branding, profile, and projects.

experiments for business logic patterns

仕組みと意味から理解する Kubernetes ミニハンズオン (JP)