I started working on Audacity in 2005, making my first commits to the code in Jan 2006. I made significant improvements to the 'Equalization' (with a lot of help) then and have made further incremental changes since.
I have also been involved in the Ruler code, various layout things, some contributions to TimeTextCtrl and the mixer, speeded up drawing and zooming in spectrograms, tried to make envelopes behave, and chased down a fair few bugs.
I am interested in signal processing in general and recently I've been playing with metering (for the next version).
For my day job, I lecture at a university in England. I came by Audacity looking for some free software for my students to use, but found that it needed a bit of work.