I was a Software Engineer for many years at Google, working on search features ("when will the sun set?", "what is the diameter of mars?"), Google Correlate and Google Flu Trends. Recently, I've been working on open source software for genetics at the Mount Sinai School of Medicine. I've been a longtime creator of open source tools, most notably the dygraphs charting library. Recent work includes "git webdiff", a Python based alternative diff tool and contributions to dpxdt, a screenshot diffing tool written in Python.