Mattias Karlsson: I think it's Brilliant

Mattias Karlsson: I think it's Brilliant

From Duke's Corner by Jim Grisanzio

September 15, 2025 · 42 min

About this episode

Jim Grisanzio interviews Mattias Karlsson about his journey in the Java community and the evolution of the Jfokus conference.

Jim Grisanzio from Oracle Java Developer Relations talks with Mattias Karlsson, Java Champion and prominent developer in the Java community who was also honored with the Java Community Lifetime Achievement recognition at Jfokus in February 2024. "I was shocked and honored — very humbled!" Mattias said about being recognized for his lifetime of achievements in the Java community by Sharat Chander of Oracle's Java Developer Relations Team. Mattias, a Stockholm-based engineer and long-time leader of the Stockholm Java User Group, shares his journey with Java, from its early days to its current role in modern tech ecosystems. He also talks about the evolution of Jfokus, a leading annual Java conference he organizes, which has grown from a small Java user group into a major gathering of over 2,000 developers from diverse backgrounds around the world. Mattias highlights Java's enduring appeal, driven by its robust JVM, backward compatibility, and vibrant community. He also reflects on the six-month release cycle, calling it "brilliant" for its balance of stability and innovation, and shares insights on mentoring young developers and using AI to stay updated. When talking about how…

People in this episode

Host: Jim Grisanzio

Guest: Mattias Karlsson

Topics covered

  • Java development
  • Jfokus conference
  • Java community
  • mentoring developers
  • AI in programming

Keywords

  • Java
  • Jfokus
  • developer relations
  • mentoring
  • AI
  • programming
  • community

Mentioned in this episode

Organizations: Oracle, Java Community, Jfokus, Oracle's Java Developer Relations Team

Places: Stockholm

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