For recent graduates

Solve problems under pressure

Interviewers test problem-solving, not memorization. Practice with exercises that build the skills whiteboard rounds actually measure.

Each course targets a specific skill. Dart fundamentals, design principles, or architecture patterns.

Write code, run tests, see results. The feedback loop is faster than any study group.

S.O.L.I.D. and D.R.Y. courses teach the vocabulary senior engineers use in system design rounds.

Built by Google Developer Experts

8+ years of production experience in every lesson.

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.

Solve it in your browser. No setup required.