5+ years of professional front-end development experience. Proficient in JavaScript (ES6+) and TypeScript. Strong experience with modern frameworks: React, Vue, Angular. Solid understanding of component lifecycle, hooks, and state management. Expertise in CSS, Tailwind, responsive design, UI interactions and animations. Experience with performance optimization (lazy loading, caching, asset optimization). Experience with accessibility standards (WCAG, ARIA, keyboard navigation). Familiarity with SEO best practices for web applications. Strong debugging skills using browser DevTools and performance monitoring tools. Experience with testing frameworks (Jest, Vitest, Playwright). Understanding of APIs and client-server communication (REST, GraphQL).