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Adrian Popescu is a data engineer at Unravel Data Systems working on performance profiling and optimization of Spark applications. He has more than eight years of experience building and profiling data management applications. He holds a PhD in computer science from EPFL, a master of applied science from the University of Toronto, and a bachelor of science from University Politehnica, Bucharest. His PhD thesis focused on modeling the runtime performance of a class of analytical workloads that include iterative tasks executing on in-memory graph processing engines (Apache Giraph BSP), and SQL-on-Hadoop queries executing at scale on Hive.