I live in Woodinville, Washington state. I originally come from Chagrin Falls, Ohio.

I received my PhD in computer science and machine learning in 2008 from Cornell. As an undergraduate at Duke I majored in computer science, and mathematics, and minored in economics.

Since 2026 I have worked for Shopify, where I am a senior staff engineer. Prior to this, from 2008 to 2026, I worked for Microsoft as a principal software development engineer, in Bing, Cloud + AI, Teams, and Azure Data. I often work on ML learning algorithms, API design and high performance computing.

My areas of expertise are boosting algorithms and linear algorithms, and machine learning problems with “weird” multi-variate loss functions, and writing data ingestion pipelines that are memory bandwidth bound as opposed to compute bound. Beyond that, in my work I’ve tended to focus more on writing algorithms, tooling, and generally the experience of using ML, than specific single applications of ML.