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Oleh Khailenko has been working in the software engineering field since 2015. Oleh began their career as a Java Developer at Pragmasoft Ukraine. In 2019, they moved to EPAM Systems as a Lead Software Engineer. Most recently, in 2021, they joined RevJet as a Senior Software Engineer.

Oleh Khailenko's education history includes a Specialist degree in Mathematical and Computational Modeling from the National University of Ukraine in 2014-2016, and a Specialist degree in Computer Programming from the Kharkiv Radiotechnical University in 2006-2010. Oleh also has several certifications, including AWS Certified Developer - Associate from Udemy in April 2018, Angular 5 (formerly Angular 2) - The Complete Guide from Udemy in December 2017, Webpack 2: The Complete Developer's Guide from Udemy in September 2017, AWS Certified Solution Architect - Associate 2017 from Udemy in August 2017, Functional Program Design in Scala from Coursera in April 2017, Hadoop. System for Processing Big Data from Mail.Ru Group in April 2017, Functional Programming Principles in Scala from Coursera in March 2017, Hadoop Platform and Application Framework from Coursera in December 2016, and AWS Certified Solutions Architect - Associate in March 2018.