Champion

Gerrit Grunwald

Azul

Gerrit Grunwald is a software engineer that loves coding for around 40 years already. He is a true believer in open source and has participated in popular projects like JFXtras.org as well as his own projects (TilesFX, Medusa, Enzo, SteelSeries Swing, SteelSeries Canvas, JDKMon).
Gerrit blogs regularly at http://harmonic-code.org, he is an active member of the Java community, where he founded and leads the Java User Group Münster (Germany), he is a JavaOne rockstar and a Java Champion. He is a speaker at conferences and user groups internationally and writes for several magazines.

Badges 9

Talks 14

  1. Devoxx Poland 2026

    Scotty I need Warp Speed - Ways to improve the JVM startup/warmup

    June 2026Java & JVM

  2. Devoxx Poland 2025

    TrashTalk - Exploring the JVM memory management

    June 2025Java & JVM

  3. Devoxx Greece 2025

    We hate code - The !joy of maintaining dead code

    April 2025Java

  4. Voxxed Days Bucharest 2025

    Trash Talk - Exploring the JVM memory system

    March 2025Java

  5. Voxxed Days CERN 2025

    Trash Talk - Exploring the JVM memory management

    January 2025Java

  6. Devoxx Belgium 2024

    Trash Talk - Exploring the JVM memory management

    October 2024java▶ Watch

  7. Voxxed Days Ticino 2024

    Wargames - Java vulnerabilities and why you should care

    January 2024Security

  8. Devoxx Belgium 2023

    Wargames - Java vulnerabilities and why you should care

    October 2023Security▶ Watch

  9. Devoxx Ukraine 2023

    Welcome to the Jungle - A safari through the JVM landscape

    September 2023java

  10. Devoxx UK 2023

    Welcome to the Jungle - A safari through the JVM landscape

    May 2023java

  11. Devoxx Greece 2023

    Welcome to the Jungle - A safari through the JVM landscape

    May 2023java

  12. Voxxed Days Bucharest 2023

    Wargames - Java vulnerabilities and why you should care

    March 2023java

  13. Voxxed Days Romania 2021

    DiscoAPI - OpenJDK distributions as a service

    October 2021Java Language

  14. Devoxx Belgium 2015

    Healthcare for the Elderly using the IoT

    November 2015future