MasterJi: Learn & Code

MasterJi is your free coding practice coach—built for students, working developers, and community learners who want to stay consistent with interview prep.

What you can do: • Solve curated problems in the in-app editor with sample tests, language templates, and detailed results • Explore daily problem drops, company-tagged sets, and public coding sheets tailored to core data structures and algorithms • Jump into coding challenges, submit proof with images, and climb challenge rankings • Earn XP, track your heatmap, maintain streaks, and collect challenge winner badges • Join live multiplayer quizzes with real-time questions, leaderboards, and timed rounds • Join Town Halls and chat in real time with your community (including GIFs, images, and @mentions)

Coding Practice: → In-app code editor with multi-language support and sample test cases → Daily problems and company-tagged question sets → Public coding sheets for structured DSA practice → Challenge rankings and proof-based submissions

Sign in with Apple, Google, or GitHub to sync progress across devices. MasterJi never shows ads or sells your data, and all uploads stay inside the community. Push notifications keep you informed about upcoming deadlines, quiz starts, wins, and code review reminders.

Perfect for: → Students preparing for technical interviews → Developers staying sharp between jobs → Anyone building a consistent coding habit → Communities running live coding competitions

Start your coding journey today—completely free.