For self-taught developers
Fill the gaps. Build with confidence.
You've watched the tutorials. You've built the side projects. But the gaps are showing. You know enough to build, but not enough to build well. Structured courses fill exactly those gaps.
A clear path through the chaos
Self-teaching means scattered knowledge. These courses build concepts in order, each lesson on the last. No more wondering what to learn next.
Prove you actually know it
Watching a tutorial feels like learning. Passing a test proves it. Every exercise runs real code against real tests. You know exactly where your understanding is solid.
The principles tutorials skip
SOLID, DRY, and architecture patterns are what separate tutorial followers from production developers. These are the concepts that make codebases maintainable.
Dart + Flutter + SOLID + DRY
From self-taught to production-ready, with no gaps.
Write code from lesson one
Every lesson is an exercise you solve in your browser. Real code, real tests, real feedback.
Structured progression
Each concept builds on the last. You always know what to learn next.
Multiple exercise types
Quizzes, fill-in-the-blank, matching, and code keep every lesson engaging.
Instant feedback
Submit your answer and see test results in milliseconds.
Learn by doing
Solve exercises in your browser from the first lesson.
Join over 5,000 learners
Explore our courses
Pick a course and solve your first exercise.
Dart Course
An interactive Dart course where you code, test, and build apps directly in your browser.
Flutter Course
An interactive Flutter course where you code, test, and build apps directly in your browser.
S.O.L.I.D. Course
Learn the principles of how software should be structured, so you can guide AI to build better systems.
D.R.Y. Course
Learn to identify and eliminate code duplication, making your codebase cleaner and easier to maintain.
System Design Course
Learn how APIs, databases, caching, and load balancing fit together to build scalable systems.
Interactive courses
Every lesson is an exercise with instant feedback.
Structure for the self-taught
Interactive courses that fill exactly the gaps tutorials leave behind.