Duke's Corner
from Oracle Java Developer Relations talks with at JavaOne 2026. Carlos is a Java Champion and also the founder of Bogota's Java User Group, Bogotá JVM. Carlos has been running monthly meetups for over a decade, and he and his colleagues have built one of the most active developer communities in Latin America. In his session at JavaOne — Teaching Java as a First Language: Lessons from Three Years of a Real-World Bootcamp — he outlined a free, online, 13-week week program for learning Java. The bootcamp started in Colombia but then quickly expanded to include multiple JUGs in Latin...
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from Oracle Java Developer Relations talks with at JavaOne 2026. Cristian is a PhD in systems engineering and a Tech Lead at CERN in Geneva. He's been at CERN for 8 years, but he's been coding since he was eight years old. He loves working with and contributing to the Java community and other Open Source projects. This was Cristian’s first JavaOne, and his session, "30 Years of Java Development: Keeping it All Together," covered how CERN keeps Java running across teams since 1998. Like any large company, CERN uses a lot of legacy code supporting systems that, in Cristian’s words, "need...
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Jim Grisanzio from Oracle Java Developer Relations talks with Martin Chalupa from Netflix at JavaOne 2026. Martin is a software developer with about eight years at Netflix and about twenty years working with Java. At Netflix, Martin works on the JVM ecosystem team, which grew from the build tooling team and now also handles broader JVM work such as tuning, garbage collection, and upgrading. In his session at JavaOne Martin covered Java ahead of time compilation and Project Leyden, and he shared what Netflix has learned from experimenting with the technology. Just as many software developers,...
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Jim Grisanzio from Oracle Java Developer Relations talks with Luiz Real, an engineer and college professor from the SouJava Community in Sao Paulo, Brazil. Luiz came to JavaOne 2026 for the first time this year to build relationships, catch up on the latest technical features in Java, and to mix with the Java Champions. He says building those connections is something you can only do in person at a conference like this. "JavaOne for me is a career changing thing," he says. In this conversation Luiz also talks about teaching Java to students, the opportunities for Java developers in the world of...
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Jim Grisanzio from Oracle Java Developer Relations talks with Henri Tremblay at JavaOne 2026. Henri is a Java Champion, Montreal JUG leader, and EasyMock lead developer from Montreal, Canada. Henri’s session at JavaOne covered the Java Memory Model, which is a topic he believes every Java developer should understand well. He’s been to six JavaOne’s and had warm words for the conference, which represents a rare opportunity to meet the people whose code runs on systems and devices all over the world. He had clear advice for developers: read books, understand how and why your code works,...
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Jim Grisanzio from Oracle Java Developer Relations talks with Bruno Borges from Microsoft at JavaOne 2026. Bruno works on GitHub's Core AI developer relations team. The conversation covers the future of Java in a world of AI, the value of learning core computer science fundamentals in school, the shifting role for software developers from just writing code to architecting higher level systems, the new business value opportunities for developers as they leverage AI technologies, and Bruno's new AI-assisted website called Java Evolved that visually compares old and new Java code patterns. Bruno...
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Bob Treacy started his career as a union steward on the factory floor at GE Aircraft Engines. After earning a BS and MS in Computer Science from Boston University while working and raising a family at the same time, he jumped to software, never looked back, and remains at the cutting edge with Java and AI. Now Principal Software Architect and Data Engineer at Harvard University, he has been writing Java since 1995 and has attended more than 20 JavaOne conferences. So, he’s lived much of the entire life of Java. At JavaOne 2026 this week from Harvard’s Dataverse project, which uses...
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This is the third in a short series of speaker profiles for in Redwood Shores, California, March 17-19. Get early bird pricing until February 9, and for a limited time, take advantage of a $100 discount by using this code at checkout: J12026IJN100. . . In this conversation, Jim Grisanzio from Java Developer Relations talks with Paul Bakker, an engineer and Java architect in California. Paul is a staff software engineer in the Java Platform team at Netflix. He works on improving the Java stack and tooling used by all Netflix microservices and was one of the original authors of the DGS...
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This is the second in a short series of speaker profiles for in Redwood Shores, California, March 17-19. Get early bird pricing until February 9, and for a limited time, take advantage of a $100 discount by using this code at checkout: J12026IJN100. JavaOne: | In this conversation, Jim Grisanzio from Java Developer Relations talks with developer advocates Marit van Dijk and Anton Arhipov from about the 25th anniversary of IntelliJ IDEA, the latest features of the IDE, Anton's upcoming session at JavaOne in March, and their perspectives on JavaOne as the premier conference for Java...
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This is the first in a short series of speaker profiles for JavaOne 2026 in Redwood Shores, California, March 17-19. Get early bird pricing until February 9, and for a limited time, take advantage of a $50 discount by using this code at checkout: J12026DCP. . . In this conversation, Jim Grisanzio from Java Developer Relations talks with Jeanne Boyarsky, a Java developer, an author, and a Java Champion based in New York City. Jeanne previews her JavaOne session, which will be a Hands on Lab for Java 25 certification. Previously, Jeanne was a guest on Duke's Corner in January 2024: . ...
info_outlineJim Grisanzio from Java Developer Relations talks with Bruno Souza, who is a Java Champion, leader of the SouJava User Group in Brazil, and a member of the JCP Executive Committee. Bruno received the first Java Community Lifetime Achievement recognition in October 2022 at JavaOne in Las Vegas. "I was totally surprised! I was jumping up and down! I was so honored! It’s an honor to be a member of that group." he said.
Bruno Souza is known as the "JavaMan" from Brazil and that nickname started back at Sun when Java was announced and Bruno started evangelizing the technology. Bruno's message to the community was "Open Standards and Open Source" as he began his community building efforts around Java. He continually brought to Brazil FOSS and Standards experts for community discussions, and he advocated for a standards-based Open Source implementation of Java that would pass the TCK.
Bruno left Sun and then returned, and he also joined the JCP (Java Community Process). Now all these years later we have OpenJDK, and open JCP, and hundreds of independent JUGs that can participate in community building and also Java development.
"Maybe my greatest pride, I think, is the idea of the Java User Groups community," Bruno says. "We have OpenJDK for development and the JCP for standards, but for me the real Java community is the Java User Groups! These are all volunteers who meet and help others participate and learn."
Bruno in recent years has been talking a lot about building reputation and career by embracing the open-source lifestyle — writing code in Java, contributing to Open Source, and helping build the community itself. Since our work lives in public mailing lists and open-source code repositories, we earn credibility by being visible, contributing, engaging the community, and helping others get involve as well, Bruno says.
Bruno advises that career is a long-term project: "The more you work on it, the more you grow, the more results you have. So, the sooner you start the better. This is not a sprint! This takes time."
Getting back to Java itself, Bruno, like most Java developers, prefers the 6-month release cadence over the older system of multi-year development and release cycles. There is a constant flow of technology now which allows for more interactions between the Oracle engineers and engineers in the community.
"Everything you see today in Java is possible because of the 6-month release process. I just loved it when the guys did that! I think it's amazing! The fact that we now have two releases per year changed Java. I think we’re positioning Java to be even stronger in the years to come. I’m very excited about the whole thing," Bruno says.
Throughout this conversation Bruno provides a wonderful history of Java since he’s been involved from the very beginning! "People don’t remember that Java was a community from the very beginning!" Bruno says. “We were able to look at the source code from the very beginning and that allowed us to build the community from the very beginning with lots of other companies joining." And then the JCP was created to allow Sun and the community to discuss the standardization of Java. And then OpenJDK was a huge step because now Java would be everywhere with Oracle leading and building the community. "Java is more participative today under Oracle than during the Sun times."
"Java + Open Source + Community: That’s what grows our career. That's what grows Java too!" — Bruno Souza
Bruno Souza
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https://x.com/SouJava
Duke's Corner Java Podcast
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Jim Grisanzio
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