Masaru Dobashi is a system infrastructure architect and expert on distributed computing, machine learning platform, and stream data processing. He leads the open-source professional service team at NTT DATA Corporation and has responsibility for introducing open source-based data platforms. Since 2009, he has developed enterprise Apache Hadoop, Spark, Kafka clusters, and machine learning platforms. He had presentations and publications at conferences, such as Kafka Summit, Spark Summit, O'Reilly Strata Data Conference, USENIX OpML, and so on. He also wrote books about Apache Spark and Kafka in Japanese.