I work in both building things and breaking things. I specialize in Ruby and JavaScript, but my side projects include:
* Reverse engineering the Vine API via mitmproxy and pulling the AWS secret key out of the iOS app via gdb and a little C: http://www.gironda.org/2013/03/03/digging-in-the-vineyard-pa...
* Exploring an issue in a Rails application all the way from JavaScript to debugging the Linux kernel over a serial port: http://www.gironda.org/2013/04/26/from-asset-precompilation-...
Recent production work involved instrumenting a Rails app to provide metrics to statsd, performing MySQL optimization, standing up a Jenkins CI instance using Chef, and beating a test suite back into shape.
You can find some of my code on my GitHub profile (https://github.com/gabrielg), and more of my writing as well as a resume on my website at http://www.gironda.org/. I'd love to hear from you — email gabriel@gironda.org if you think we can work together.