Champion

Stefan Johansson

Oracle

Stefan is a software engineer in Oracle's HotSpot GC team, where he has been a key contributor since joining in 2013. With a strong focus on the G1 and ZGC garbage collectors, Stefan has been actively involved in the OpenJDK community throughout his career. Before diving into garbage collection, he worked on a variety of other JVM-related projects at Oracle, building a deep expertise in Java performance and memory management.

Badges 4

Talks 3

  1. Devoxx Belgium 2025

    Garbage Collection in Java: Choosing the Correct Collector

    October 2025Java

  2. Devoxx Belgium 2024

    Garbage Collection in Java: The progress since JDK 8

    October 2024java▶ Watch

  3. Devoxx UK 2024

    Garbage Collection in Java: The progress since JDK 8

    May 2024Java▶ Watch