Reynold Xin is a computer scientist and engineer specializing in big data, distributed systems, and cloud computing. He is a co-founder and Chief Architect of Databricks. He is a frequent speaker on the topic of Big Data and open source software at conferences. He is best known for his work on Apache Spark, which as of June 2016 is the top open-source Big Data project. He designed and lead development of the GraphX, Project Tungsten, and Structured Streaming components and he co-designed DataFrames—all of which are part of the core Apache Spark distribution—plus served as the release manager for Spark's 2.0 release. As of September 2016 he is also the most active contributor to Spark with over 1000 commits.