Andres is a Java/Groovy developer and a Java Champion Alumni, Developer Advocate for the Database Group At Oracle, with more than 2 decades of experience in software design and development. He has been involved in web and desktop application development since the early days of Java. Andres is a true believer in open source and has participated on popular projects like Groovy, Griffon, and DbUnit, as well as starting his own projects. Founding member of the Griffon framework and Hackergarten community event. Author of JReleaser.

Andres is a Java/Groovy developer and a Java Champion Alumni, Developer Advocate for the Database Group At Oracle, with more than 2 decades of experience in software design and development. He has been involved in web and desktop application developm... Show more

Michael is Java Champion and Senior Consultant at INNOQ, a software-development and consulting company based in Germany. With over 15 years of professional experience, his expertise ranges from application development with Java and Spring Boot to designing distributed systems and contributing to open-source projects. Lately his interests revolve around observability, containerization and code maintenance. He is a frequent speaker at conferences and meetups and author of popular articles, including a period op-ed for a German magazine.

Michael is Java Champion and Senior Consultant at INNOQ, a software-development and consulting company based in Germany. With over 15 years of professional experience, his expertise ranges from application development with Java and Spring Boot to des... Show more

Nathaniel T. Schutta is a software architect and Java Champion focused on cloud computing, developer happiness and building usable applications. A proponent of polyglot programming, Nate has written multiple books, appeared in countless videos and many podcasts. He’s also a seasoned speaker who regularly presents at worldwide conferences, meetups, universities, and user groups. In addition to his day job, Nate is an adjunct professor at the University of Minnesota, where he teaches students to embrace (and evaluate) technical change. Driven to rid the world of bad presentations, he coauthored the book Presentation Patterns with Neal Ford and Matthew McCullough, and he also published Thinking Architecturally and Responsible Microservices available from O’Reilly. His latest book, Fundamentals of Software Engineering, is currently available in early release.

Nathaniel T. Schutta is a software architect and Java Champion focused on cloud computing, developer happiness and building usable applications. A proponent of polyglot programming, Nate has written multiple books, appeared in countless videos and ma... Show more

Guillaume Laforge is Developer Advocate for Google Cloud Platform, at day, focusing on generative AI, LLMs, serverless technologies and event-driven architecture, and at night, he is a Java Champion and wears his Apache Groovy hat.

Guillaume Laforge is Developer Advocate for Google Cloud Platform, at day, focusing on generative AI, LLMs, serverless technologies and event-driven architecture, and at night, he is a Java Champion and wears his Apache Groovy hat. Show more

Oliver Drotbohm has been a member of the Spring open source engineering team for 15 years. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due for release in 2025.

Oliver Drotbohm has been a member of the Spring open source engineering team for 15 years. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due for release in ... Show more

Brian Demers is a Developer Advocate at Gradle, a Java Champion, and an Apache Member who contributes to the Directory, Maven, and Shiro projects. He spends much of his day contributing to OSS projects by writing code, tutorials, blogs, and answering questions. In addition to typical software development, Brian also has a passion for fast builds, security, and automation.

Away from the keyboard, Brian is a beekeeper and can likely be found playing board games. You can find him online at https://bsky.app/profile/bdemers.io.

Brian Demers is a Developer Advocate at Gradle, a Java Champion, and an Apache Member who contributes to the Directory, Maven, and Shiro projects. He spends much of his day contributing to OSS projects by writing code, tutorials, blogs, and answering... Show more

Jonatan Ivanov is an enthusiastic Software Engineer, member of the Spring Engineering Team, maintainer of Micrometer, one of the leaders of the Seattle Java User Group, speaker, author, Java Champion.
He has hands-on experience in developing and shipping innovative, production-ready software for industry-leader companies. He likes Distributed Systems, Production, Open Source, Math, Linux, Cloud environments; he is passionate about the Java Ecosystem and the Java Community.
He is an Open Source contributor, writes a "develotters"-focused blog (https://develotters.com), sometimes can be found on Twitter(@jonatan_ivanov) and in the Seattle area.

Jonatan Ivanov is an enthusiastic Software Engineer, member of the Spring Engineering Team, maintainer of Micrometer, one of the leaders of the Seattle Java User Group, speaker, author, Java Champion. He has hands-on experience in developing and shi... Show more

Justin Lee is a Java Champion and a Kotlin fanatic. He has been programming in Java since 1996 and has worked on virtually every level of the application stack from database drivers all the way to application servers and front end interfaces. A long time advocate of Java and Kotlin, he has spoken at conferences and user groups all across three continents. He is an active open source community member contributing when and where he can. He is currently a Senior Software Engineer at DataDog and can be found on twitter and github as @evanchooly.

Justin Lee is a Java Champion and a Kotlin fanatic. He has been programming in Java since 1996 and has worked on virtually every level of the application stack from database drivers all the way to application servers and front end interfaces. A long... Show more

Mark Heckler, MBA is the Senior Director of Field Engineering at Moderne.
He has worked with key players in numerous industries and organizations to develop, deliver, and maintain critical capabilities securely, on time, and on budget. Mark is an open source contributor, author of Spring Boot: Up and Running (https://bit.ly/springbootbook), and a licensed, instrument-rated pilot.

Mark Heckler, MBA is the Senior Director of Field Engineering at Moderne. He has worked with key players in numerous industries and organizations to develop, deliver, and maintain critical capabilities securely, on time, and on budget. Mark is an o... Show more

María Arias de Reyna is a Java Champion, geospatial enthusiast and FLOSS advocator.

She has been a community leader and core maintainer of several free and open source projects since 2004. She is currently working at IBM where she focuses on OpenJDK.

María is an experienced keynoter and speaker. Between 2017 and 2019 María was the elected President of OSGeo, the Open Source Geospatial Foundation which serves as an umbrella for the most used geospatial free and open source software. She is also well known as a feminist and Women In Tech activist.

María Arias de Reyna is a Java Champion, geospatial enthusiast and FLOSS advocator. She has been a community leader and core maintainer of several free and open source projects since 2004. She is currently working at IBM where she focuses on OpenJ... Show more

Evgeny is a contributor to various open source projects, including OpenJDK, and a speaker at international conferences and JUGs. He is also one of the project leads of widely adopted code coverage library for Java and Kotlin - JaCoCo, and the award-winning EclEmma project at the Eclipse Foundation that integrates JaCoCo into Eclipse. In his day job at Sonar he develops SonarQube’s static source code analysis for languages such as Java, Kotlin, C, and C++.

Evgeny is a contributor to various open source projects, including OpenJDK, and a speaker at international conferences and JUGs. He is also one of the project leads of widely adopted code coverage library for Java and Kotlin - JaCoCo, and the award-w... Show more

Antón is a Principal Software Engineer at New Relic, specializing in Data in Motion and high-throughput streaming systems. As an enthusiastic Java developer, he frequently works with Apache Kafka and Flink. Beyond his core engineering work, Antón is a Rust aficionado and keen on reducing his carbon footprint 🌱.

Antón is a Principal Software Engineer at New Relic, specializing in Data in Motion and high-throughput streaming systems. As an enthusiastic Java developer, he frequently works with Apache Kafka and Flink. Beyond his core engineering work, Antón is ... Show more

Karl Heinz Marbaise works as a freelance DevOps in the Java environment. This includes developments in Java (Spring Boot, JUnit Jupiter, Testcontainers etc.) and the development of tools for process support in Go. In the area of build and configuration management (Maven, Jenkins, Nexus, Git) he has been conducting trainings for years. In his spare time he works on various open source projects including the Apache Maven project. Acting as Apache Project Chairman. He gives talks on various topics at different events.

Karl Heinz Marbaise works as a freelance DevOps in the Java environment. This includes developments in Java (Spring Boot, JUnit Jupiter, Testcontainers etc.) and the development of tools for process support in Go. In the area of build and configurati... Show more

Elder helps Java developers to build and deliver secure, available, and fast server-side applications. He is a published author of six books and a board member at SouJava, one of the biggest JUGs in the world. As a Developer Advocate, Elder shares experiences and best practices through online content and at international events like JavaOne, The Developers Conference, QCon, Oracle Code One, Campus Party, and Devnexus.

Elder helps Java developers to build and deliver secure, available, and fast server-side applications. He is a published author of six books and a board member at SouJava, one of the biggest JUGs in the world. As a Developer Advocate, Elder shares ex... Show more

ags likes distributed systems in all shapes and form. Coding since the age of 8, loves simplicity and continuous delivery. While he has written in many languages, he favours the JVM. Since "most software problems are people problems”, he stirs communities, organizes and speaks at conferences (proud to be a JavaONE Rockstar!). He is passionate about all things data, because science! In his spare time…cycling, photography and books. And he is a Java Champion!

ags likes distributed systems in all shapes and form. Coding since the age of 8, loves simplicity and continuous delivery. While he has written in many languages, he favours the JVM. Since "most software problems are people problems”, he stirs commun... Show more

Jeanne Boyarsky is a Java Champion from New York City and has been a Java developer for more than 21 years. She has co-authored Wiley's Oracle Java 8/11/17/21 certification books in addition to "Real World Java". Jeanne volunteers at CodeRanch and mentors the programmers on a high school robotics team in her free time. She has spoken at numerous conferences including Dev Nexus, QCon, KCDC, and JavaOne.

Jeanne Boyarsky is a Java Champion from New York City and has been a Java developer for more than 21 years. She has co-authored Wiley's Oracle Java 8/11/17/21 certification books in addition to "Real World Java". Jeanne volunteers at CodeRanch and me... Show more

Marcus has spent the past 20+ years combining modern web technologies and Java. More recently, he's been exploring how AI is changing the way we interact with computers. Marcus is always curious to learn new things and loves helping developers learn new things. Marcus is a Java Champion and currently works as the VP of AI Research at Vaadin.

Marcus has spent the past 20+ years combining modern web technologies and Java. More recently, he's been exploring how AI is changing the way we interact with computers. Marcus is always curious to learn new things and loves helping developers learn ... Show more

Craig Walls is an engineer with Broadcom, Java Champion, Alexa Champion, and the author of Spring AI in Action, Spring in Action, and Build Talking Apps. He's a zealous promoter of the Spring Framework, speaking frequently at local user groups and conferences and writing about Spring, Alexa, and Generative AI. When he's not slinging code, Craig is planning his next trip to Disney World or Disneyland and spending as much time as he can with his wife, two daughters, 1 bird and 2 dogs.

Craig Walls is an engineer with Broadcom, Java Champion, Alexa Champion, and the author of Spring AI in Action, Spring in Action, and Build Talking Apps. He's a zealous promoter of the Spring Framework, speaking frequently at local user groups and co... Show more

Experienced Software Engineer | Architect | Keynote & Public Speaker | Java Champion | Google Developer Expert for Cloud | Docker Captain | Oracle ACE Pro | Community Leader | Mentor | Ex-leader of JavaZone and Norwegian JUG – javaBin.

Experienced Software Engineer | Architect | Keynote & Public Speaker | Java Champion | Google Developer Expert for Cloud | Docker Captain | Oracle ACE Pro | Community Leader | Mentor | Ex-leader of JavaZone and Norwegian JUG – javaBin. Show more

Burk is a long-time programmer and software architect, with experience in multiple languages including JavaScript and Java. He’s presented at multiple conferences including ConnectTech, DevNexus, JavaOne, and Oracle Code One, and contributed to three of the “97 Things” books published by O’Reilly.
Burk works as a Solution Architect for Daugherty Business Solutions where he's focused on finding ways to deliver better code in less time, and teaching others how to do the same.

Burk is a long-time programmer and software architect, with experience in multiple languages including JavaScript and Java. He’s presented at multiple conferences including ConnectTech, DevNexus, JavaOne, and Oracle Code One, and contributed to three... Show more

Daniel Hinojosa is a programmer, consultant, instructor, speaker, and author. With over 20 years of experience, he does work for private, educational, and government institutions. Daniel loves JVM languages like Java, Groovy, and Scala; but also works with non-JVM languages like Haskell, Ruby, Python, LISP, C, C++. He is an avid Pomodoro Technique Practitioner and makes every attempt to learn a new programming language every year. Daniel is the author of Testing in Scala and the video of Beginning Scala Programming Video Series for O’Reilly Publishing. For downtime, he enjoys reading, swimming, Legos, football, and cooking.

Daniel Hinojosa is a programmer, consultant, instructor, speaker, and author. With over 20 years of experience, he does work for private, educational, and government institutions. Daniel loves JVM languages like Java, Groovy, and Scala; but also work... Show more

Melissa is passionate about Java, DevSecOps, CI/CD, and MLOps. Her career spans over 20 years and includes experience as a Principal Software Engineer and DevRel leadership. She has served a term on the Technical Steering Committee of the Open Platform for Enterprise AI (OPEA), and has previously served as a CNCF Governing Board Member. Melissa loves sharing her knowledge with the community as a developer, speaker, and author, and has been recognized as a Java Champion and a Docker Captain. She is an international speaker at numerous events including KubeCon, CDCon, Open Source Summit, and DockerCon, and is co-author of the O'Reilly title, DevOps Tools for Java Developers.

Melissa is passionate about Java, DevSecOps, CI/CD, and MLOps. Her career spans over 20 years and includes experience as a Principal Software Engineer and DevRel leadership. She has served a term on the Technical Steering Committee of the Open Platfo... Show more

Deepu K Sasidharan is a Software Engineer by passion and profession. He is a Java Champion working as a Staff Developer Advocate at Okta. He is the co-chair of JHipster and the creator of KDash and JDL Studio. He is a polyglot programmer working with Java, Rust, JavaScript, Go, and so on. He is also a cloud technology advocate and an open-source software aficionado. He has authored books on Full-stack development and frequently writes about Java, Rust, JavaScript, Go, DevOps, Kubernetes, Linux, and so on, on his blog.

Deepu K Sasidharan is a Software Engineer by passion and profession. He is a Java Champion working as a Staff Developer Advocate at Okta. He is the co-chair of JHipster and the creator of KDash and JDL Studio. He is a polyglot programmer working with... Show more

Dervis is an experienced Java-developer and principal officer, currently working for the Norwegian Labour and Welfare Administration. He is passionate about programming languages, functional programming and algorithms. Dervis is a Java Champion and the leader of the Norwegian JUG JavaBin (Dukes Choice Award winner in 2019). Dervis has spoken at several international conferences as well as being a regular speaker at local meetups in Norway.

Dervis is an experienced Java-developer and principal officer, currently working for the Norwegian Labour and Welfare Administration. He is passionate about programming languages, functional programming and algorithms. Dervis is a Java Champion and t... Show more

Developer Relations Engineer for Timefold, Java Champion and leader of the Belgian Java User Group. Tom has a decade worth of experience delivering systems and loves to share not only knowledge but also passion for our craft.

You can read more at his blog (http://www.tomcools.be) or follow him on Bluesky (@tomcools.be).

Developer Relations Engineer for Timefold, Java Champion and leader of the Belgian Java User Group. Tom has a decade worth of experience delivering systems and loves to share not only knowledge but also passion for our craft. You can read more at ... Show more

Software Engineer at Docker, Testcontainers maintainer, Open Source Contributor and Java Champion.

Software Engineer at Docker, Testcontainers maintainer, Open Source Contributor and Java Champion. Show more

Holly Cummins is a Senior Principal Software Engineer on the Quarkus team. Holly has worked as a cloud consultant, full-stack javascript developer, devops architect, JVM performance engineer, and innovation leader. Holly has built apps to understand climate risks, count fish, help a blind athlete run ultra-marathons in the desert solo, and invent stories (although not at all the same time).

Holly Cummins is a Senior Principal Software Engineer on the Quarkus team. Holly has worked as a cloud consultant, full-stack javascript developer, devops architect, JVM performance engineer, and innovation leader. Holly has built apps to understand ... Show more

Developer, author, teacher. Forty years in computing. Co-author “Java Generics and Collections”, author “Mastering Lambdas”. Java Champion, JavaOne Rockstar, frequent conference speaker.

Developer, author, teacher. Forty years in computing. Co-author “Java Generics and Collections”, author “Mastering Lambdas”. Java Champion, JavaOne Rockstar, frequent conference speaker. Show more

Rodrigo Graciano is a Java Champion with over 15 years of software development experience and a Director at BNY. He is also a senior member and a leader in the NYJavaSIG, the Java User Group from NY. He is a frequent speaker at JUGs and conferences such as Devnexus, JavaOne, KCDC, and TDC Brazil.

Rodrigo Graciano is a Java Champion with over 15 years of software development experience and a Director at BNY. He is also a senior member and a leader in the NYJavaSIG, the Java User Group from NY. He is a frequent speaker at JUGs and conferences s... Show more

Miroslav Wengner is an engineer with a passion for resilient distributed systems and product quality. He is a co-author and contributor to the Robo4J project (a reactive soft real-time framework for robotics/IoT). Miro contributes to OpenJDK and participates in other open source technologies. He uses his passion for helping build resilient and scalable solutions.
Miro was selected for the Java Champions Program, recognized as a JavaOne Rockstar, and elected to the Java Community Process (JCP) as an Executive Member. Recently, Miro published his book Practical Design Patterns for Java Developers to help the community understand the benefits of new Java enhancements (https://amzn.eu/d/9ahtr3I).

In addition to his day-to-day duties as a principal engineer at OpenValue, he shares his knowledge at conferences (JavaOne, Devoxx, and so on) and in blogs. Miro believes in the Java ecosystem and helps move it forward!

Miroslav Wengner is an engineer with a passion for resilient distributed systems and product quality. He is a co-author and contributor to the Robo4J project (a reactive soft real-time framework for robotics/IoT). Miro contributes to OpenJDK and part... Show more