About me

Hello, I’m Eugene Petrenko, human. You may also know me as @jonnyzzz. In real life, I’m also Evgeny Petrenko and Евгений Петренко.


Eugene is a IntelliJ IDEA software developer at JetBrains, speaker, trainer, and blogger. His interests include software development, distributed systems, infrastructure, cloud, programming languages, and infrastructure. Eugene holds a PhD in computer science; he writes code in Java, Kotlin, Go, Terraform, C/C++, and JavaScript. A Kotlin fan for years, he started using Kotlin before 1.0 and completed his first production Kotlin app back in 2013.

You may find several photos of me here and there. For conferences, I have an avatar there and here for conference sites.

I spoke at many events and I’ll be happy to speak at your event (say on Kotlin or Kotlin/Native) too, feel free to reach me out via twitter or email to me at jonnyzzz.com

Certificate, Diplomas and Courses






  • German Language B2 from Goethe Institute, Munich, Germany. ✅ certificate
  • Media Training ✅ certificate
  • Oracle Certified Professional

Find more at my LinkedIn Profile

More Info

I’m a developer advocate at JetBrains and software developer who speaks at conferences, writes blog and codes in Kotlin.

I work in the IT field for more than 19 years

At JetBrains since 2004. Participated in several well-known products, including ReSharper, TeamCity, Upsource, Toolbox App, few mode internal projects, now working on IntelliJ IDEA and IntelliJ IDEA Platform.

My son names have 4 common letters: Alexej and Alexander

Saint Petersburg, Russia is the city I grew up. I studied at Saint Petersburg State University, at the Faculty of Mathematics and Mechanics. I got Candidate of Sciences or Ph.D in computer science in 2009.

I moved to Munich, Germany in 2011.

Eugene Petrenko bio photo