Eric Deandrea is a Java Champion & Senior Principal Developer Advocate at Red Hat, focusing on application development technologies. Eric has over 25 years of experience designing and building Java-based solutions and developer training programs. He is a contributor to various OSS projects, including Quarkus, Spring, LangChain4j, WireMock, and Microcks, as well as a speaker at many public events and user groups around the world. Eric recently put his Quarkus and Spring knowledge to use by publishing his first book, “Quarkus for Spring Developers (https://red.ht/quarkus-spring-devs).” Outside of work, Eric enjoys boating on the lakes of New Hampshire, ice hockey, and martial arts, in which he holds a black belt in Kempo Karate.

Eric Deandrea is a Java Champion & Senior Principal Developer Advocate at Red Hat, focusing on application development technologies. Eric has over 25 years of experience designing and building Java-based solutions and developer training programs. He ... Show more

Staff Developer Advocate for Snyk, Java Champion, Oracle Ace Pro, and Software Engineer with over a decade of hands-on experience in creating and maintaining software. He is passionate about Java, (Pure) Functional Programming and Cybersecurity. Brian is a JUG leader for the Virtual JUG and the NLJUG. He also co-leads the DevSecCon community and is a community manager for Foojay. He is a regular international speaker on mostly Java-related conferences like JavaOne, Devnexus, Devoxx, Jfokus, JavaZone and many more. Besides all that, Brian is a military reserve for the Royal Netherlands Air Force and a Taekwondo Master / Teacher.

Staff Developer Advocate for Snyk, Java Champion, Oracle Ace Pro, and Software Engineer with over a decade of hands-on experience in creating and maintaining software. He is passionate about Java, (Pure) Functional Programming and Cybersecurity. Bria... Show more

Simon Martinelli is a Java Champion, Vaadin Champion, and Oracle ACE Pro, with over three decades of experience as a software architect, developer, consultant, and trainer. As the owner of Martinelli LLC, he specializes in optimizing full-stack development with Java and has a deep focus on modern architectures and distributed systems.

He frequently shares his expertise by speaking at international conferences, writing articles, and maintaining his blog: https://martinelli.ch.
His passion for teaching is reflected in his work as a lecturer at the Bern University of Applied Sciences BFH and the University of Applied Sciences Northwestern Switzerland FHNW, where he teaches courses on modern architecture, distributed systems, persistence technologies, and DevOps.

Simon Martinelli is a Java Champion, Vaadin Champion, and Oracle ACE Pro, with over three decades of experience as a software architect, developer, consultant, and trainer. As the owner of Martinelli LLC, he specializes in optimizing full-stack devel... Show more

A N M Bazlur Rahman is a Software Engineer with over a decade of specialized experience in Java and related technologies. His expertise has been formally recognized through the prestigious title of Java Champion. Beyond his professional commitments, Mr. Rahman is deeply involved in community outreach and education. He is the founder and current moderator of the Java User Group in Bangladesh, where he has organized educational meetups and conferences since 2013.

In the past two years, Mr. Rahman has been an active speaker at various international conferences and Java user groups. His talks have often focused on specialized topics such as concurrency and virtual threads. In addition to his community work, Mr. Rahman also serves as an editor for Java Queue at InfoQ and Foojay.io, both of which are leading platforms for technology content. Notably, he has authored five books on the Java programming language in Bengali, three of which have become best sellers in Bangladesh.

He is currently writing a new book with O'Reilly titled "Modern Concurrency in Java".
https://learning.oreilly.com/library/view/modern-concurrency-in/9781098165406/

A N M Bazlur Rahman is a Software Engineer with over a decade of specialized experience in Java and related technologies. His expertise has been formally recognized through the prestigious title of Java Champion. Beyond his professional commitments, ... Show more

Notorious engineer at work and after hours, tracing meanders of the art of software engineering. Java Champion. Testcontainers Champion. Remote Software Gardener, mostly working in web-oriented Java gardens. Programming usually in Java (since 1.3), Scala and Go, but in other languages too. Fan of agility, seen mostly as choosing the right tools and approaches after asking the right questions. Developer, trainer and conference speaker. In his talks, Piotr covers not only hardcore Java but also software architecture, computer security, and soft-skills.

Notorious engineer at work and after hours, tracing meanders of the art of software engineering. Java Champion. Testcontainers Champion. Remote Software Gardener, mostly working in web-oriented Java gardens. Programming usually in Java (since 1.3), S... 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

Baruch Sadogursky (@jbaruch) did Java before it had generics, DevOps before there was Docker, and DevRel before it had a name. He started DevRel at JFrog when it was ten people and took it all the way to a successful $6B IPO by helping engineers solve problems. Now Baruch keeps helping engineers solve problems but also helps companies help engineers solve problems. He is a co-author of the "Liquid Software" and "DevOps Tools for Java Developers" books, Java Champion and CNCF Ambassador alumni, serves on multiple conference program committees, and regularly speaks at numerous most prestigious industry conferences, including Kubecon, JavaOne (RIP), Devoxx, QCon, DevRelCon, DevOpsDays (all over), DevOops (not a typo) and others.

Baruch Sadogursky (@jbaruch) did Java before it had generics, DevOps before there was Docker, and DevRel before it had a name. He started DevRel at JFrog when it was ten people and took it all the way to a successful $6B IPO by helping engineers solv... Show more

Mary is a Java Champion, and the AI Practice Lead at Callibrity, a consulting firm based in Cincinnati, Ohio. She started as an engineer in Unix/C, then transitioned to Java around 2000 and has never looked back since then. After 20+ years of being a software engineer and technical architect, she discovered her true passion in developer and customer advocacy. Most recently she has serviced companies of various sizes such as IBM, US Cellular, Bank of America, Chicago Mercantile Exchange, in topic areas that included Java, GenAI, Streaming systems, Open source, Cloud and Distributed messaging systems. She is also a very active tech community leader outside of her day job. She is the President of the Chicago Java Users Group (CJUG), and the Chicago Chapter Co-Lead for AICamp.

Mary is a Java Champion, and the AI Practice Lead at Callibrity, a consulting firm based in Cincinnati, Ohio. She started as an engineer in Unix/C, then transitioned to Java around 2000 and has never looked back since then. After 20+ years of being... Show more

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. You can find him on twitter too as @aalmiray. He likes to spend time with his beloved wife, Ixchel, when not hacking around.

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

With over 20 years of diverse experience across various roles and companies, Marit is passionate about building awesome software in collaboration with amazing people, and making developers’ lives better.
She is committed to continuous learning and actively shares her expertise in programming, software development, testing, and test automation. Marit regularly presents at international conferences, participates in webinars, and appears on podcasts. Additionally, she writes blog posts and tutorials, creates videos, and is a contributor to the book "97 Things Every Java Programmer Should Know" (O’Reilly Media).

With over 20 years of diverse experience across various roles and companies, Marit is passionate about building awesome software in collaboration with amazing people, and making developers’ lives better. She is committed to continuous learning and a... Show more

Richard Fichtner is Principal Software Architect at XDEV Software GmbH and has worked in the software industry for more than 20 years, often at the interface between business and technology. He is involved in the open-source community to spread knowledge about Java technologies. He speaks at conferences and contributes to various open-source projects such as https://www.rapidclipse.com/. Richard is a leader of the Java User Group Oberpfalz, Co-organizer of JCON conferences https://jcon.one/, recognized as Java Champion, Oracle ACE Pro, IBM Champion and holds a Master of Science degree in applied computer science. He is passionate about enabling developer productivity and supports teams in the use of cloud solutions. His interests are Java, clean code, cloud, new technologies and everything pragmatic.

Richard Fichtner is Principal Software Architect at XDEV Software GmbH and has worked in the software industry for more than 20 years, often at the interface between business and technology. He is involved in the open-source community to spread knowl... 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

Elias is a Java Champion, Oracle ACE Pro, Java Magazine NL and Senior Principal Software Engineer at Backbase.

He shares content related to Java, OSS and Quality Engineering at conferences, meetups, articles and open-source conferences.

Elias is a Java Champion, Oracle ACE Pro, Java Magazine NL and Senior Principal Software Engineer at Backbase. He shares content related to Java, OSS and Quality Engineering at conferences, meetups, articles and open-source conferences. Show more

Oliver Drotbohm is a member of the Spring engineering team at VMware by Broadcom, Inc.. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due to release in 2024.

Oliver Drotbohm is a member of the Spring engineering team at VMware by Broadcom, Inc.. His work focused on software architecture, DDD, REST, and persistence technologies. His new book, “Modulithic Applications with Spring”, is due to release in 2024... Show more

Rafael works as a software consultant in Oslo, Norway. He is a proponent of static typing and a JVM enthusiast with particular interest in code instrumentation, concurrency and functional programming. Rafael blogs about software development, regularly presents at conferences and was pronounced a JavaOne Rock Star. When coding outside of his work place, he contributes to a wide range of open source projects and often works on Byte Buddy, a library for simple runtime code generation for the Java virtual machine. For his work, Rafael received a Duke's Choice award and was elected a Java Champion.

Rafael works as a software consultant in Oslo, Norway. He is a proponent of static typing and a JVM enthusiast with particular interest in code instrumentation, concurrency and functional programming. Rafael blogs about software development, regularl... 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

Ken Kousen is the author of the Pragmatic Programmers books "Mockito Made Clear" and "Help Your Boss Help You", the O'Reilly books "Kotlin Cookbook", "Modern Java Recipes", and "Gradle Recipes for Android", and the Manning book "Making Java Groovy". He is a regular speaker on the No Fluff, Just Stuff conference tour, and has spoken at conferences all over the world. He is a Java Champion, a JavaOne Rock Star, and a Devnexus Rock Star. Currently he a Professor of the Practice of Computer Science and Associate Director for STEM Initiatives at the Entrepreneurship Center at Trinity College in Hartford, CT.

In addition to various industry certifications, he has BS degrees in both Mathematics and Mechanical Engineering from M.I.T., an MA and Ph.D. in Aerospace Engineering from Princeton, and an MS in Computer Science from R.P.I.

Ken Kousen is the author of the Pragmatic Programmers books "Mockito Made Clear" and "Help Your Boss Help You", the O'Reilly books "Kotlin Cookbook", "Modern Java Recipes", and "Gradle Recipes for Android", and the Manning book "Making Java Groovy". ... Show more

Hanno Embregts is a Java Developer with a passion for learning, teaching and making music.

In his day-to-day job as an IT Consultant at Info Support, Hanno prefers work that is fast-paced and versatile. This is why he juggles Java development, software architecture, public speaking, leading Info Support’s Java Community and teaching courses at Info Support’s Knowledge Centre.

Hanno is both a Java Champion and an Oracle ACE Pro. He is also one of the editors of the Dutch Java Magazine. Outside of work Hanno likes making music with his friends. He plays the flute, the guitar and he likes to sing.

Software conferences are Hanno’s favourite thing in the world, because they allow him to do the three things he loves most at the same time: learning new things, teaching others about stuff he discovered and yes: even making music from time to time!

Hanno Embregts is a Java Developer with a passion for learning, teaching and making music. In his day-to-day job as an IT Consultant at Info Support, Hanno prefers work that is fast-paced and versatile. This is why he juggles Java development, sof... Show more

Maarten is a an architect, senior developer and trainer. He is recognised as a Java Champion and Oracle ACE Pro. Maarten is passionate about "building the right thing" and "building the thing right". He loves to share new ideas and knowledge through speaking and his blog, https://maarten.mulders.it. Outside work, he appreciates creating and consuming good food, photography, and music - in no particular order.

Maarten is a an architect, senior developer and trainer. He is recognised as a Java Champion and Oracle ACE Pro. Maarten is passionate about "building the right thing" and "building the thing right". He loves to share new ideas and knowledge through ... 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

Anton is a Developer Advocate in the Kotlin team at JetBrains. With a professional background in server-side development, Anton has been building tools for developers for more than ten years. Recognized as a Java Champion since 2014, he often speaks at software conferences and contributes to the Kotlin YouTube channel.

Anton is a Developer Advocate in the Kotlin team at JetBrains. With a professional background in server-side development, Anton has been building tools for developers for more than ten years. Recognized as a Java Champion since 2014, he often speaks ... 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

Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Java Champion and JUG Leader based in Sweden.

Besides advocating the Jakarta EE technologies, Ivar is contributing to the Jakarta EE specifications as well as being the PMC Lead for Eclipse Enterprise for Java (EE4J). He is also one of the specification leads for Jakarta MVC and represents Eclipse Foundation on the JCP Executive Committee.

Ivar is also involved in a wide range of other open-source projects and communities. He is a frequent speaker at International developer conferences.

Ivar Grimstad is the Jakarta EE Developer Advocate at Eclipse Foundation. He is a Java Champion and JUG Leader based in Sweden. Besides advocating the Jakarta EE technologies, Ivar is contributing to the Jakarta EE specifications as well as being ... 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, No Fluff Just Stuff symposia, 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

Marcus has spent the past 20+ years combining modern web technologies and Java. He's 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 Developer Relations at Vaadin.

Marcus has spent the past 20+ years combining modern web technologies and Java. He's 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 Developer Relations at V... Show more

Michael Redlich has been an active member within the Java community for the past 25 years. He founded the Garden State Java User Group (formerly the ACGNJ Java Users Group) in 2001 where he serves as one of the directors. Since 2016, Mike has served as a Java community news editor for InfoQ where his contributions include the weekly Java news roundup, news items, technical articles and technical reviews from external authors. He is currently the lead Java Queue editor. Mike joined Payara as a contract Developer Advocate and Technical Writer in the summer of 2023.

He is the author of "Helidon Revealed: A Practical Guide to Oracle’s Microservices Framework," scheduled to be released in late-December 2024.

Mike has presented at venues such as Devnexus, Oracle Code One, JCON World, Emerging Technologies for the Enterprise, Trenton Computer Festival (TCF), TCF IT Professional Conference, and numerous Java User Groups. Mike serves as a committer on the Jakarta NoSQL and Jakarta Data specifications and the Eclipse JNoSQL project. He also participates on the leadership council of the Jakarta EE Ambassadors. Mike was named a Java Champion in April 2023.

He retired from ExxonMobil Technology & Engineering in June 2023 with 33½ years of service. His experience included developing custom scientific laboratory and web applications, polymer physics, chemometrics, infrared spectroscopy and automotive testing. He also has experience as a Technical Support Engineer at Ai-Logix, Inc. (now AudioCodes) where he provided technical support and developed telephony applications for customers.

Michael Redlich has been an active member within the Java community for the past 25 years. He founded the Garden State Java User Group (formerly the ACGNJ Java Users Group) in 2001 where he serves as one of the directors. Since 2016, Mike has served ... 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

Ix-chel Ruiz has developed software application & tools since 2000. Her research interests include Java, dynamic languages, client-side technologies and testing. Java Champion, Oracle ACE pro, Testcontainers Community Champion, CDF Ambassador, Hackergarten enthusiast, Open Source advocate, public speaker and mentor.

Ix-chel Ruiz has developed software application & tools since 2000. Her research interests include Java, dynamic languages, client-side technologies and testing. Java Champion, Oracle ACE pro, Testcontainers Community Champion, CDF Ambassador, Hacker... Show more

Kevin is a Java Champion, software engineer, author and international speaker with a passion for Open Source, Java, and Cloud Native Development & Deployment practices. He currently works as developer advocate at Red Hat where he gets to enjoy working with Open Source projects and improving the developer experience. He previously worked as a (lead) software engineer at a variety of organizations across the world ranging from small startups to large enterprises and even government agencies.

Kevin is actively involved in Open Source communities, contributing to projects such as Quarkus, Knative, Apache Camel, and Podman (Desktop). He is also a member of the Belgian CNCF and the Belgian Java User Group.

Kevin speaks English, Dutch, French and Italian fluently and is currently based in Belgium, having lived in Italy and the USA as well.

In his free time you can find Kevin somewhere in the wild hiking, gravel biking, snowboarding or packrafting.

Kevin is a Java Champion, software engineer, author and international speaker with a passion for Open Source, Java, and Cloud Native Development & Deployment practices. He currently works as developer advocate at Red Hat where he gets to enjoy workin... Show more

Java Champion, Organiser at BarcelonaJUG and cofounder of JBCNConf and DevBcn conferences in Barcelona.

Currently working as a Developer Advocate in Java at Sonar (SonarLint,SonarQube), focused on Clean Code & Security.

I have worked as a (paid) developer since the first release of The Secret of Monkey Island, about 30 years ago using Go on Kubernetes for a Service Mesh layer on top of Istio | Java on Kubernetes for K8s Operator, Rest API, using Quarkus, GraalVM, Apache Camel | PHP | VB | Python | Pascal | C

I am very interested in simulated reality, psychology, philosophy, and Java.

Java Champion, Organiser at BarcelonaJUG and cofounder of JBCNConf and DevBcn conferences in Barcelona. Currently working as a Developer Advocate in Java at Sonar (SonarLint,SonarQube), focused on Clean Code & Security. I have worked as a (pai... Show more