A new way to learn coding and sharpen your skills. Attack problems like a ninja, slice through complexity, and become a coding master.
Master the art of coding with our unique dojo-style approach to learning
Attack coding challenges with precision. Each problem you solve is another code block sliced!
Quick, bite-sized challenges that fit your schedule. Level up in minutes, not hours.
Spaced repetition and smart scheduling surface exactly what you need to practice, right when you need it.
Progress through 8 belts from white to black as you demonstrate sustained mastery across varied contexts.
Your sensei watches how you solve problems — noticing anti-patterns, missed opportunities, and breakthroughs to adapt your training.
Practice with fresh, realistic challenges that maintain your edge. Like a martial artist's daily kata — mastery is a lifelong pursuit.
Join the dojo and start slicing through code challenges today. Open source and free forever.
Start Training on GitHub