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1donnemartin / system-design-primerCollect system-design concepts, examples and study material.PythonLicense not declared376,550

2CyC2018 / CS-Notes:books: Essential basic knowledge for technical interviews, Leetcode, computer operating systems, computer networks, system designJavaScriptLicense not declared186,458

3Snailclimb / JavaGuideA Java interview guide covering computing foundations, databases, distributed systems, and AI development.JavaScriptApache-2.0 · Permissive159,392

4labuladong / fucking-algorithmCrack LeetCode, not only how, but also why.MarkdownLicense not declared136,034

5Chalarangelo / 30-seconds-of-codeShort coding examples and articles for developers.JavaScriptCC-BY-4.0 · Permissive129,434

6rasbt / LLMs-from-scratchA step-by-step guide to implementing a language model in PyTorch.Jupyter NotebookLicense not declared107,701

7ByteByteGoHq / system-design-101Explain complex systems using visuals and simple terms. Help you prepare for system design interviews.License not declared90,936

8career-ops-hq / career-opsOpen-source AI job search agent and job finder: scan job boards, score each job 1-5 against your CV before you apply, tailor an ATS-friendly resume and cover letter, get interview prep and an application tracker. It helps you fill in each application; you press Submit. Runs locally in Codex, OpenCode and other AI CLIs, or as a Claude Code plugin.JavaScriptMIT · Permissive80,553

9doocs / advanced-java😮 Core Interview Questions & Answers For Experienced Java (Backend) Developers | Complete literacy in advanced knowledge of Internet Java engineers: covering knowledge in high concurrency, distribution, high availability, microservices, massive data processing and other fieldsJavaCC-BY-SA-4.0 · Share derivative source79,173

10MisterBooo / LeetCodeAnimationLearning material explaining algorithm solutions through animations.JavaLicense not declared76,715

11shanraisshan / claude-code-best-practiceA collection of Claude Code practices and agentic engineering guidance.HTMLMIT · Permissive68,639

12lydiahallie / javascript-questionsA long list of (advanced) JavaScript questions, and their explanations :sparkles:MIT · Permissive65,275

13youngyangyang04 / leetcode-master"Code Random Record" LeetCode question brushing strategy: 200 classic questions in the order of answering questions, a total of 600,000 words of detailed illustrations, video analysis of difficult points, more than 50 mind maps, supporting multi-language versions such as C++, Java, Python, Go, JavaScript, etc. From now on, algorithm learning will no longer be confused! 🔥🔥 Come and take a look, you will find that it is too late to meet you! 🚀ShellLicense not declared62,779

14h5bp / Front-end-Developer-Interview-QuestionsA list of helpful front-end related questions you can use to interview potential candidates, test yourself or completely ignore.NunjucksMIT · Permissive60,849

15type-challenges / type-challengesCollection of TypeScript type challenges with online judgeTypeScriptMIT · Permissive48,559

16luongnv89 / claude-howtoAn example-driven Claude Code guide with visual explanations and templates.PythonMIT · Permissive46,416

17sudheerj / reactjs-interview-questionsList of top 500 ReactJS Interview Questions & Answers....Coding exercise questions are coming soon!!JavaScriptMIT · Permissive44,918

18yangshun / front-end-interview-handbookFront End interview preparation materials for busy engineers (updated for 2026)JavaScriptMIT · Permissive44,002

19huihut / interview📚 Summary of basic knowledge of C/C++ technical interviews, including language, program library, data structure, algorithm, system, network, link loading library and other knowledge as well as interview experience, recruitment, internal referral and other information. This repository is a summary of the basic knowledge of recruiting job seekers and beginners in the direction of C/C++ technology, including language, program library, data structure, algorithm, system, network, link loading library, interview experience, recruitment, recommendation, etc.C++License not declared38,281

20denysdovhan / wtfjsExamples illustrating surprising JavaScript behavior.JavaScriptWTFPL · Permissive37,686