Real tests for real roles, live coding contests and a leaderboard for your own university. Colleges see who is ready; companies hire them.
No install, no sign-up. JavaScript, Node.js, Python and R run instantly in your browser.
Preview with sample data
Every track has a round for a startup, a mid-size firm and an enterprise. Practise for the employer you actually want.
Write JavaScript in the browser, run examples instantly, then submit against hidden test cases, judged the way interviews are.
A shared countdown, a live online counter and a leaderboard that moves the moment someone finishes.
You compete with your own university. The top ten with the Season Pass win a T-shirt, bottle and stickers.
Skills radar, score trend and topic accuracy show each student exactly where to improve.
Server-side timers, one ranked attempt, tab-switch logging and hidden test cases keep every score honest.
An Arena T-shirt, a steel bottle and a sticker set. Open to Season Pass holders. Rank is your best score in each test, and ties go to the faster finisher.
Yes. Every track has a free Startup round, there is a free DSA warm-up, and live sprints are free to join. Pay only to unlock the full set of tests and prize eligibility.
The top ten students of each university who hold the Season Pass. Rank is your best score in every test; the faster finisher wins a tie.
A campus report: how many students are active, average scores, the weakest topics to teach, and who your top performers are. It exports to CSV and prints cleanly.
Students can opt in to being visible. Companies then filter by track, university and score, and contact only the students who said yes.
The live judge runs JavaScript today, with instant feedback on examples and hidden test cases on submit. Python, Java, C, C#, Go, Rust and R are being added; the home-page terminal previews the same problem in all nine languages.