Zoltan is an Industry Expert, CTO of Datapao, a Big Data and Cloud Service company. He has been working as an Instructor and Consultant since 2016. He has over 15 years of experience developing data-intensive applications. He spends most of his time helping companies kick-off and mature their data analytics infrastructure and gives Spark, ML, and Cloud courses regularly. Earlier he built Prezi.com’s Big Data infrastructure and led Prezi’s data engineering team, scaling it to serve 60 million users backed by over a petabyte of data volume. Later he worked on Big Data and Spark integration projects with RapidMiner, a global leader in predictive analytics.