Open source. Open possibilities.

A curated list of companies and teams that avoid traditional CS trivia and whiteboard interviews, favoring practical assessments like take-home projects and pair programming.

Code随想录 (LeetCode-Master) is a structured LeetCode study plan covering data structures and algorithms, with 200+ curated problems, detailed图文 solutions, and video lectures, supporting C++、Java、Python and other languages.

A community-maintained DevOps reference guide covering Docker, Kubernetes, Prometheus, Git, Ansible, Terraform, Jenkins, GitLab CI, GitHub Actions, CircleCI, Travis CI, Puppet, Chef, Linux, and networking, with concepts, commands, tutorials, interview questions, and curated learning links.

The System Design Primer is an open-source guide for learning scalable architecture and preparing for system design interviews, featuring organized resources, solved exercises, and Anki flashcards.

JavaGuide is a systematic knowledge base for Java backend developers and interviewees, covering Java fundamentals, collections, concurrency, JVM, databases, distributed systems, system design, and AI application development, while providing learning roadmaps and interview preparation advice.

Front End Interview Handbook: an open-source collection of front-end interview preparation materials covering interview formats, system design, trivia, coding questions and company-specific questions, with translations into several languages.

A large open-source collection of 2624 DevOps and SRE interview questions and hands-on exercises spanning Linux, Kubernetes, Terraform, AWS, Azure, GCP, Docker, Ansible, CI/CD, networking, databases, observability, and more.

A curated collection of free resources for learning system design concepts and preparing for interviews, covering core concepts, networking, APIs, databases, caching, distributed systems, architectural patterns, tradeoffs, and interview problems.