UI

I did JavaScript development for Google from September 2012 until October 2013. Prior to that I had two years of professional experience using jQuery. I've also made appropriate use of JavaScript in the photo sharing service I created, OurDoings.

Middle Tier

I did some Java and C++ work at Google. I have over 5 years of professional experience using PHP. I've also worked in ASP.NET, Java, Perl and Scheme. My general Computer Science knowledge allows me to be productive in any language quickly.

Database

I've worked professionally with Oracle and Microsoft SQL databases. I've used PostgreSQL in personal projects, and am familiar with MySQL. I use ANSI SQL syntax to maximize portability.