Full guides
Deep lessons for languages, web, and databases — plain English, no fluff.
Guides, practice & live duels
Learn code.
Duel rivals. Climb up.
Run visible tests before you submit, challenge online coders on the leaderboard, and win best-of series with round timers — all server-graded.
- Visible test cases
- Live 1v1 duels
- Online leaderboard
23
Guide courses
4
Code paths
1v1
Duel formats
devladder.init
>>> Welcome to Dev Ladder
>>> hero.login("you")
>>> Visible tests: loaded
>>> Leaderboard: rivals online
>>> duel.invite("coder42") ... sent
>>> Ready. Run code, then duel.
+120 XP available today
Rivals online
Duel invite
Why Dev Ladder
Built to keep you going
Run before submit
See sample test cases beside each problem. Run them first, then submit for a full grade.
Live duels
Challenge online rivals from the leaderboard. Set series length, timer, and difficulty — first correct answer wins the round.
Leaderboard & quests
See who's online, climb the ranks, earn XP, and keep streaks alive across quests and arena runs.
Topics you can learn
Ready to enter the academy?
Create your hero, practice with visible tests, then challenge someone on the leaderboard.