Holden is a transgender Canadian open source developer advocate with a focus on Apache Spark, related "big data" tools. She is the co-author of Learning Spark, High Performance Spark, and Kubeflow for ML. She is a committer and PMC on Apache Spark and ASF member. 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. Outside of work she enjoys dancing, scooters, and playing with fire.