I'm a (full-stack) web and app developer with more than 5 years' experience programming using many languages, libraries, and frameworks. I'm an expert of JavaScript and HTML5 APIs but my interests also include web security, accessibility, performance, and SEO. Currently I'm self-employed working with the cited technologies. I'm also a regular writer for several networks, speaker, and author of the books "jQuery in Action, third edition" and "Instant jQuery Selectors".