5+ years of experience in front-end development 2+ years in leadership or senior developer roles Expert-level proficiency in HTML5, CSS3, JavaScript (ES6+) Expert-level proficiency in modern front-end frameworks (React, Vue.js, or Angular) Strong experience with responsive design, mobile-first development, and cross-browser compatibility Proven track record of building high-converting landing pages and optimizing conversion rates Experience with version control systems (Git), build tools, and deployment pipelines Strong understanding of web performance optimization, SEO principles, and accessibility standards Demonstrated ability to lead technical projects and mentor development teams Experience with analytics implementation and data-driven development decisions