A software engineer working at Treasure Data. Treasure Data provides a big data management platform on cloud. We are original creator of Fluentd, unified log collector which was joined clout native computing foundation (CNCF) . He is working on developing and maintaining distributed processing platform in our service. His professional area is distributed computing using open source software like Hadoop, Spark and Presto. In addition He is a committer of Apache Hivemall which is a scalable machine learning library running on Hive/Spark.