I am well versed in HTML / CSS / DOM / JavaScript / jQuery & jQuery UI, but sometimes my wife jokes about my lack of aesthetics.
More often I am a veteran in .NET framework development (2.0-4.0), proficient in C# / ASP.NET / MVC / WCF and good at Microsoft SQL server.
Equipped with tools like firebug, fiddler2, Visual Studio, I am a quick problem solver to discover causes of problems and deliver quality solutions.
HTML, CSS, and JavaScript are all about user experience. In most cases, this front
end is a fairly thin layer on top of the much larger back end.

The success of the user experience lies not in the hands of the chosen deployment
platform but in the hands of a developer with an eye for user experience.