To work with other developers and designers to maintain existing website code, create new designs from mockups, add new interactive features to existing sites and work with layouts. In addition to using web programming and scripting languages, they also use graphic design tools to make site banners, backgrounds and other page elements. Troubleshooting and testing are also part of the job, and developers work to ensure sites are accessible in multiple browsers and that all web applications work correctly.

3-4 years of web development experience

XHTML / HTML5

CSS2.1 / CSS3

JavaScript / Ajax

jQuery

HTML5 Boilerplate

Modernizr

YUI Library

OOCSS

CSS Grids

CSS Frameworks / Resets

Progressive Enhancement / Graceful Degradation

HTML and CSS Specifications (W3C / WHATWG)

UX / Usability

Website Speed / Performance

Debugging Tools (Firebug, etc)

Responsive Web Design

Mobile Web Development

Cross-Browser / Cross-Platform Development

Document Object Model (DOM)

Cross-Browser Bugs and Inconsistencies (primarily IE6-8)

CSS Pre-Processors (LESS / Sass)

Version Control (Git / GitHub / CVS / Subversion)

HTML5 APIs (Canvas, Geolocation, Video, etc.)

OOP

Back-end Templating languages/technologies (.NET)

Microdata / Microformats

HTML5/CSS3 Polyfills

Data Formats (e.g. JSON, XML)

Image Editing Tools (Photoshop, Fireworks, etc.)