I do both front-end and back-end web development.
When your site takes a long time to load, you may potentially lose a customer. While you cannot control your visitors' connection speeds, you can make sure your site loads fast. I create sites that load quickly and perform.
The Internet has gone mobile. Your site must be mobile accessible. I develop websites that work on desktops and mobile devices, all in one design. (Go ahead, pull this site up on your phone!)