5+ years focused on React in large-scale applications. Expert in JavaScript (ES6+) and TypeScript. Deep expertise with React (hooks, context, state management, component architecture, performance optimisation). Strong knowledge of CSS and responsive design principles. Proficient in accessibility (WCAG standards) and cross-browser compatibility. Testing experience: unit, integration, and end-to-end. Track record of building and deploying production-grade React applications. Experience mentoring developers and contributing to engineering culture. Excellent communication and collaboration skills in cross-functional teams. Bachelor’s degree in Computer Science, Engineering, or related field preferred (or equivalent practical experience).