TheFind.com is also openings for UI engineers also, in Mountain View/San Francisco, CA.
Here's are the full reqs: 
<a href="http://startuply.com/Jobs/Web_UI_Architect_2519_2.aspx" >http://startuply.com/Jobs/Web_UI_Architect_2519_2.aspx</a>
<a href="http://startuply.com/Jobs/Web_UI_Engineer_2519_1.aspx" >http://startuply.com/Jobs/Web_UI_Engineer_2519_1.aspx</a>
Ask HN: Who Is Hiring? (June 2012)