Ellen Friedman is Principal Technologist with MapR, a speaker and author, currently writing mainly about big data topics. She is a committer for the Apache Drill and Apache Mahout projects.  With a PhD in Biochemistry, she has years of experience as a research scientist and has written about a variety of technical topics including molecular biology, and oceanography. O'Reilly publications include "Introduction to Apache Flink", "Streaming Architecture" and the Practical Machine Learning series.