I work on spacecraft flight software. It's pretty much my dream job. Before this, I was at WVU's Applied Space Exploration Laboratory.
I used to work in bioinformatics. My Ph.D. is in Cell & Molecular Biology (2013), from the University of Texas at Austin. I use Ruby for writing tools for that, as well as for community organizing.
I'm also a computer scientist by training (Virginia Tech Class of 2007), and am fluent in C++ and C.
I am most comfortable in UNIX/Linux; I'm a Mac user and an Ubuntu person. In addition to Ruby, C, and C++, I am decent at Python.
I'm the former director of the SciRuby Project. Check it out: Sciruby.com. I wrote NMatrix, but have now passed responsibility for it on to others.