The fast lane to senior.
Like Duolingo — but for backend systems, advanced topics, and real-world interviews.
Microlearning That Works Without Extra Effort
Endless microlearning loop
Tap in, learn, quiz, repeat. It’s like TikTok meets Duolingo, but for code - ideal during coffee breaks.
Built for professionals
Deep-dive into architecture, JVM internals, design patterns - all in bite-sized modules made for experienced developers.
Based on Real Knowledge
Learn from the books every developer should know — the ones that shaped real-world software, not just theory.
Thinking in Java
Java Basics
A beginner-friendly course on core Java concepts.
Clean Code
Best Practices
Guide to writing professional-grade code through disciplined practices and real-world examples.
Mastering the Java Virtual Machine
Java JVM
A deep dive into the Java Virtual Machine, from bytecode to performance tuning.
Kafka: The Definitive Guide
Distributed Systems
A comprehensive resource on Apache Kafka for real-time data pipelines and stream processing at scale.
Reactive Programming with RxJava
Reactive Java
An in-depth guide to building asynchronous, event-driven applications using RxJava.
Why We Built Coro?
Inspired by what developers told us they actually need. ♥
"Not gonna lie, I want to keep learning… but after 8 hours of coding and meetings, I’ve got zero energy left for a 2-hour Udemy course."
"I don’t need a full bootcamp. I just want something small I can do daily to keep learning without killing my free time."
"Honestly, I’ve bought like 6 courses in the past year and finished none. They’re just too much. I wish there was something lighter I could actually stick with."