Vitaly Khudobakhshov is a Director of Engineering at Product Science, a California-based technological startup founded by the Liberman brothers. Product Science helps its users to improve the performance of mobile apps by spotlighting some imperfections in the code and processes. Prior to choosing a new career path, Vitaly was project lead of Big Data Tools for IntelliJ IDEA at JetBrains. In the past, he worked as a senior analyst and data engineer for one of the largest social networks Odnoklassniki, implementing recommendation algorithms and ETLs in Scala, Java, and Apache Spark. He also taught courses in computer science, software engineering, and big data for many years.