Software engineer, author, speaker and blogger
Alex Holmes has worked on distributed systems since the mid 90's, and has specialized in building large-scale projects using tools such as Spark, Hadoop, Cassandra and Kafka to solve tough big data problems. He is the author of "Hadoop in Practice", a book published by Manning Publications ( http://www.manning.com/holmes2/ ). http://www.manning.com/holmes2/). He has presented multiple times at JavaOne, and is a JavaOne Rock Star.