For enterprise developers

Declarative UI, from first principles.

XML layouts and imperative view controllers are the old model. Learn declarative UI through interactive exercises that build real intuition.

Flutter's widget tree is a function of state. You declare what the screen looks like. The framework handles the updates.

Build complex UIs by composing small, focused widgets. The same SOLID principles you know, applied to UI architecture.

SwiftUI, Jetpack Compose, React, Flutter. Every major framework is declarative now. Learn the pattern once, apply it everywhere.

Dart + Flutter + SOLID

From imperative views to declarative widgets.

Write code from lesson one

Every lesson is an exercise you solve in your browser. Real code, real tests, real feedback.

Write a greeting function

main.ts

function greet(name: string) {

return `Hello, ${name}!`

}

Each concept builds on the last. You always know what to learn next.

Quizzes, fill-in-the-blank, matching, and code keep every lesson engaging.

Submit your answer and see test results in milliseconds.

Learn by doing

Solve exercises in your browser from the first lesson.

Pick a course and solve your first exercise.

An interactive Dart course where you code, test, and build apps directly in your browser.

An interactive Flutter course where you code, test, and build apps directly in your browser.

Learn the principles of how software should be structured, so you can guide AI to build better systems.

Learn to identify and eliminate code duplication, making your codebase cleaner and easier to maintain.

Learn how APIs, databases, caching, and load balancing fit together to build scalable systems.

Interactive courses

Every lesson is an exercise with instant feedback.

Interactive exercises that teach declarative patterns through practice.