JUG.ru Group

Ivan Krylov is a lead developer at Azul Systems, working on Zing JVM. Ivan has been in JVM development since 2005 and presently focuses on Compiler infrastructure. Previous experience includes the Hotspot Runtime development and JIT compiler work for the HSA/OpenCL stack.

Andrei has been working in IT for more than 15 years, for the last 7 years — in KROK. During his career he took part in many custom development projects, mainly e-document flow systems and business processes automatization for several big Russian companies as a senior developer and an architect. At the universities of Moscow, he delivers lectures in development basics with the use of Java technologies. Organizer and leader of Moscow Java developers community.

Gleb has seen some things.

Volker Simonis works in SAP JVM Technology group. He is an OpenJDK contributor from the very beginning and helped SAP to engage in the OpenJDK project. He's the project lead of the OpenJDK PowerPC/AIX and s390x porting projects, a JDK reviewer and JCP Executive Committee representative for SAP. He's also a member of the JCP JSR 379 (Java SE 9), JSR 383 (Java SE 10) and JSR 384 (Java SE 11) Expert Groups.

Anton is a Developer Advocate at JetBrains. Working with TeamCity and IntelliJ IDEA. Programming in Java and Kotlin. Professional interests include programming languages, middleware, and developer tooling.

Lead Software Engineer of Development Practices department in NetCracker. Spent more than 7 years working on the edge between Release Engineering, Development and IT. Started with support of existing systems which then evolved to process transformations, new tools in VCS & CI streams and their integrations with other parts of NetCracker's dev ecosystem. Likes Groovy, Jenkins, JUG.ru Group conferences and to make developers happy.

Sebastian Daschner is a Java Developer Advocate at IBM, a consultant, author, and trainer. He is the author of the book "Architecting Modern Java EE Applications". Sebastian is participating in the JCP, helping forming the future standards of Java EE and Jakarta EE, and collaborating on various open source projects. For his contributions in the Java community and ecosystem he was recognized as a Java Champion, Oracle Developer Champion and double 2016 JavaOne Rockstar.

Besides Java, Sebastian is also a heavy user of cloud native technologies. He evangelizes computer science practices on https://blog.sebastian-daschner.com, his newsletter, and on Twitter via @DaschnerS. Sebastian kickstarted the JOnsen and jSpirit unconferences that connect Java developers throughout the globe. When not working with Java, he also loves to travel the world — either by plane or motorbike.

Oleg works on enterprise Java web apps for 10 years already, his primary specialization is E-Government information systems in Public Administration. Today he is employed by JUG.ru Group. Prior to joining JRG Oleg was working at Sberbank Technology where he was solving architectural problems and research in the field of automated business process management systems. And many things prior to STB like gosuslugi.ru (central e-government portal in Russia), Integrated Electronic Medical Record (central medical portal), information analysis and emergency calls system for Russian citizens, The IUPAT Integrated Member Services information system in the USA, MMORPG games at Playtox, Flussonic streaming media server and StarView Operational Intelligence platform (JVM-based programming language and IDE).

Sergey works on a high-frequency trading application at Raiffeisenbank since 2016. Basically, he's into speeding up the existing and writing the new low-latency Java code. Before that he worked at Intel as an engineer for the compilers' performance for C / C ++ / FORTRAN languages.

Principal Programmer / Architect at T-Systems, co-leader of the Bulgarian Java User Group. In addition to work, Dmitry performs talks at conferences. Organizer of jPrime.io Conference — largest Java conference in Balkans.

List of his main interests includes dynamic languages on JVM (Nashorn project) and Java EE, as well as all Spring Framework's infrastructure. He is into experimental Java projects.

10+ years experience in IT, starting from C/C++ and geophysics and now basically JVM languages/JS and financial services.

Lately Maxim is working on API development for mobile apps and security layers. Basically, he uses Spring and Netflix ecosystem, but checks out everything that is worth trying on GitHub.

He is experimenting with reactive approaches, a couple of experiments got to the production level.

He wants to understand not only his apps but also everything around them, thus he is working with all the infrastructure (logs, CI/CD, orchestration) and tests. To sum up, DevOps is our everything.

Co-founder of Plumbr, the only performance monitor solution with root cause detection, where he now contributes as core developer and lead of engineering team. Three-time JavaOne RockStar and frequent conference speaker.

Troubleshooter, assumptions destroyer, finds the most joy when deletes deprecated code.

Vladimir has been working on performance and scalability of Netcracker platform (a software used by telecom operators for automatization of network management processes and network equipment) for ten years. His focus is Java and Oracle Database performance optimisations. Vladimir is an author of more than a dozen of performance improvements in the official PostgreSQL JDBC driver.

Vsevolod has more than 7 years in IT industry.

He has experience in building test automation from scratch in mobile, desktop, web projects (especially for financial companies). He switched to full-stack development and worked for 1.5 years by the contract at Google in California. After living in the sunshine place Vsevolod decided that he was missing sunny days in St. Petersburg, so he moved back there. Right now he's living in St. Petersburg and working as a senior developer at Grid Dynamics.

He's passionate about meetups, conferences, hackatons.

Oleg Šelajev is a developer advocate for the GraalVM project at Oracle Labs, which aims to make programs run faster and developers more productive. He helps to organize VirtualJUG, the online Java User Group, and a GDG chapter in Tartu, Estonia. Became a Java Champion in 2017. Loves pizza and playing chess. Favorite languages: Java, JavaScript, and Clojure.