I'm front-end developer. I create websites that allow the user to experience your website in the best and most appropriate way relevant to the device they are using. By using progressive enhancement, a website is delivered with a responsive layout that can best make use of the space available on the smallest to largest devices. Cross browser compatibility is ensured by using feature detection so older browsers still in use today provide a solid experience, whilst modern browsers can go the next step and enhance the users time spent on your site.