Sergiy is a research engineer at Microsoft Cloud and Information Services Lab, where he is building large scale distributed systems for big data and machine learning. He is a committer to the Apache REEF project. Prior to Microsoft, Sergiy worked as a data research engineer at Yahoo! Research, and tried his hand in building machine learning systems at several Silicon Valley startups. Sergiy is interested in machine learning, data stream processing, and high performance distributed systems. His previous speaking experience includes UAI, MLDS, and HadoopSummit conferences.