Zoltan Toth is a freelance data engineer and trainer with over 15 years of experience developing data-intensive applications. Zoltan spends most of his time helping companies kick off and mature their data analytics infrastructure and regularly gives Hadoop, big data, and Spark trainings. Zoltan built Prezi’s big data infrastructure and later led Prezi’s data engineering team, scaling it to serve 60 million users backed by a data volume over a petabyte. He also worked on big data and Spark-integration projects with RapidMiner, a global leader in predictive analytics. Besides working with data analytics architectures, Zoltan teaches at Central European University, one of the best independent universities in Europe.
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