Everything you need to practice DSA, debug logic, and master coding — built for speed and clarity.
Full-featured code editor with syntax highlighting, multi-language support, and a familiar VS Code-like experience right in your browser.
Submissions are judged via a queue-based pipeline (BullMQ + Judge0) and results are pushed instantly over WebSockets — no page refresh needed.
Markdown statements with LaTeX math support. Filter by difficulty, tags, and topic to target exactly what you want to practice.
See your solve stats broken down by difficulty (Easy, Medium, Hard). Revisit past submissions and study your growth over time.
JWT auth with httpOnly cookies, Redis-backed token revocation, per-device session management, and Google OAuth — security is never an afterthought.
Share your profile with others — showcase your solve count, join date, verification badge, and compete on the global leaderboard.
Write and run code in C++, Java, Python, and JavaScript. Each language is sandboxed with strict time and memory limits for fair judging.
Unlock exclusive problems, detailed editorial walkthroughs, and advanced test cases with a StackTrace Premium subscription.
Our worker infrastructure scales horizontally. Submissions are picked up by BullMQ workers the instant they are queued — median verdict in under 2 seconds.
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