At Genentech, I created a declarative grammar of graphics for biological data and rewrote a package using the ggplot2 extension mechanism. I also architected a query mechanism for lazily loading biological file formats.
I modernized the bigBed/bigWig networking stack with libcurl, migrated the UCSC query API to its REST API, and fixed memory leaks using valgrind. On my RTO Shield project, I built a Shopify app that scores return-to-origin risk in real time using an XGBoost model.

