Advanced Javascript, CSS 2/3, HTML 5, D/XHTML, XML, JSON, DOM Concepts Must have worked on a SPA framework: ReactJS, AngularJS, BackboneJS, Familiarity with common Javascript Libraries such as jQuery would be a plus NodeJS knowledge is a plus Fluent in responsive design and mobile / tablet UI / UX Knowledge about UI testing automation Web mobile (touch devices: mobiles and tablets) experience is expected UI Performance: should have hands on experience of optimizing page load, rendering, caching. Good understanding of AJAX and its UI implications Sense for appeal & aesthetics from a usability perspective