Sergey Tryuber joined Grid Dynamics back in 2009 as a Full Stack Java Developer. It was only two years later, in 2011, when he took part in his first Hadoop project. That was a rising and romantic era of Big Data: MapReduce was the major batch processing paradigm, Column Families in Cassandra, and fewer companies cared about large scale in-stream processing. Many geographically distributed projects formed a united Big Data community exchanging their findings and experience. Sergey and many other great engineers helped lead this community. This development resulted in a set of best practices, reference architectures, and blueprints that helped Grid Dynamics be able to better position themselves on the market. In 2016, as a Technical Director in Big Data, Sergey and his team turned massive data processing into one of the strongest areas of Grid Dynamics’ expertise. However, Sergey left the company in 2017 to pursue his personal goals.