For engineering managers
Same team. Same patterns.
When everyone structures code differently, PRs take forever. Give your team shared principles through interactive exercises they actually complete.
Start Team TrainingSOLID principles, applied
Every principle taught through exercises that make developers apply it to real code. The understanding sticks.
Shared vocabulary
When your team shares the same design principles, code reviews become conversations about tradeoffs instead of arguments about style.
Faster code reviews
Consistent architecture means less back-and-forth. PRs that follow shared patterns merge faster.
SOLID + DRY courses included
Self-paced training your team fits around their sprint work.
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
An interactive Dart course where you code, test, and build apps directly in your browser.
Flutter
An interactive Flutter course where you code, test, and build apps directly in your browser.
S.O.L.I.D Principles in OOP
Learn the principles of how software should be structured, so you can guide AI to build better systems.
D.R.Y. (Don't Repeat Yourself)
Learn to identify and eliminate code duplication, making your codebase cleaner and easier to maintain.
TypeScript
Learn TypeScript from variables to generics, with coding challenges you solve directly in your browser.
System Design
Learn how APIs, databases, caching, and load balancing fit together to build scalable systems.
Microcontrollers
From GPIO pins and breadboard circuits to sensors, displays, motors, and communication protocols like I2C, SPI, and UART.
Electricity and Current
Learn how electricity works, from voltage, current, and resistance to circuits, Ohm's law, and common components like resistors, LEDs, and capacitors.
Interactive courses
Every lesson is an exercise with instant feedback.