How I Became a React Expert at Klarna — And How You Can Too (Full Modern React Course) When I moved to Sweden in 2019 to work at Klarna, I wasn’t a React expert. But after building real-world systems, working with React/React Native, and interviewing 90 developers, I discovered exactly what developers get wrong about React. So I created this 90-minute course to fix that—no outdated tutorials, no theory without context. Just the core modern concepts you must understand to build real applications

Advanced React.js

Advanced React: Design System, Design Patterns, Performance