UI Frameworks React, Angular (or equivalent modern frameworks) Strong understanding of component-based architecture Managing complex application state effectively (State Management) UI libraries Ant Design, Material UI (MUI), Bootstrap, Tailwind CSS Charting & Data Visualization D3.js, Highcharts, Chart.js, Recharts Ability to build interactive and performant dashboards Microfrontends Architecture Strong proficiency in HTML5, CSS3, and modern JavaScript (ES6+), Typescript Deep understanding of DOM, browser rendering, and performance optimization Web security basics (XSS, CSRF prevention) Cross-browser compatibility and responsive design