Strong front-end web development is a key ingredient in any website or web system. Perfect design and rock solid back-end programming can be rendered useless if the end product doesn't function correctly on the user's chosen device.

Over the years it has grown to become a profession in it's own right, no longer constrained to markup, styling, and scripting. The popularity of single-page applications, not to mention responsive requirements, makes modern front-end development every bit as complex and demanding as back-end development, if not more-so.

Below is a list of the kind of things I‘ve handled. Also, see my Guess Detective project, it's a mobile app built entirely in BackboneJS.
 

New builds and rebuilds:
  - Building responsive templates from PSD files
  - Reskinning existing CMS-based websites
  - Finding and fixing browser specific bugs
  - Fitting new design elements into existing sites
  - Retroactively applying responsive designs

Building custom functionality:
  - AJAX pagination, select autoload
  - Re-usable conditional dialogues
  - Unique modal overlays

Integrating plugins:
  - Slideshows, lightboxes, modals
  - WYSIWYG editor, datepickers
  - Predictive search

Adhoc UI creation:
  - CMS UI created with Twitter Bootstrap
  - Back office UI created with Zurb Foundation