Holden is a transgender Canadian open source developer with a focus on Apache Spark, and related "big data" tools. By day (and night, go go startup life) she works on brining large language models and other AI tools to help healthcare users deal with insurance through https://www.fighthealthinsurance.com & https://www.fightpaperwork.com.

She is the co-author of Learning Spark, High Performance Spark, and a few others. She is a committer and PMC on Apache Spark. She was tricked into the world of big data while trying to improve search and recommendation systems and has long since forgotten her original goal.