Paweł holds PhD in distributed databases. He has over 9 years of technical experience at Allegro – a platform responsible for the majority of Polish ecommerce market. Since 3 years he is a Big Data Professional working as Hadoop Project Manager. Big Data Ecosystem @ Allegro contains two Hadoop clusters in data centers with more than 4 petabytes of data, Presto SQL Engine and Kafka ingestion process. He is passionate about optimizing data processing – formerly Hive, currently Spark.