Eugene is a software developer, Ph.D., speaker, and blogger. He is working at JetBrains on the Developer Advocacy team and contributing to open source. His passion includes software architecture, server-side, clouds, AWS, production, programming languages. Eugene speaks and works with Java, Kotlin, Go, C/C++, Qt, .NET, Web. He started using Kotlin before trait was renamed to interface. Eugene has been a Kotlin fun for years and completed his first production Kotlin code back in 2013.