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

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, 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, 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 leade... 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

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

Oleg Šelajev is a developer advocate at Docker working mainly on developer productivity, Testcontainers, improving how we set up local development environments and tests, and building applications with AI parts. Developer. Author. Speaker. Java Champion. Docker captain.
Loves all languages.

Oleg Šelajev is a developer advocate at Docker working mainly on developer productivity, Testcontainers, improving how we set up local development environments and tests, and building applications with AI parts. Developer. Author. Speaker. Java Champ... 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, 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. After a tenure of eleven years in JFrog DevRel, Baruch is the Principal Developer Productivity Engineering Advocate at Gradle.

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

With 20 years of software development experience in different roles and companies, Marit loves building awesome software with amazing people and making developers lives better.
She enjoys learning new things as well as sharing knowledge on programming, software development, testing & test automation, and more.
She has contributed to open-source projects like Cucumber and several other projects. Marit speaks at international conferences, in webinars, and on podcasts, writes blog posts and tutorials, and contributed to the book “97 Things Every Java Programmer Should Know” (O’Reilly Media).

With 20 years of software development experience in different roles and companies, Marit loves building awesome software with amazing people and making developers lives better. She enjoys learning new things as well as sharing knowledge on programm... Show more

Simon Martinelli is a Java Champion, a Vaadin Champion, and an Oracle ACE Pro. He regularly shares his knowledge in articles, speaks at international conferences, and writes his blog: https://martinelli.ch. His current interest is increasing the efficiency of full-stack development with Java.

He owns 72 Services LLC and has worked as a software architect, developer, consultant, and trainer for three decades, especially in the Java Enterprise environment. In addition to his work, he is a lecturer at the Bern University of Applied Sciences BFH and the University of Applied Science Northwestern Switzerland FHNW on modern architecture and integrating distributed systems, persistence technologies, and DevOps.

Simon Martinelli is a Java Champion, a Vaadin Champion, and an Oracle ACE Pro. He regularly shares his knowledge in articles, speaks at international conferences, and writes his blog: https://martinelli.ch. His current interest is increasing the effi... 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

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 and automation.

Away from the keyboard, Brian is a beekeeper and can likely be found playing board games. You can find him on Twitter at https://twitter.com/briandemers.

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

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

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

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

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 presents as a speaker at large 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 present... Show more

Passionate architect, senior developer and trainer; also Java Champion. Passionate about "building the right thing" and "building the thing right". Focusing on lean and elegant solutions. Love to share new ideas and knowledge. Outside work, I appreciate creating and consuming good food, photography, and music, in no particular order.

Passionate architect, senior developer and trainer; also Java Champion. Passionate about "building the right thing" and "building the thing right". Focusing on lean and elegant solutions. Love to share new ideas and knowledge. Outside work, I appreci... Show more

Justin Lee is a Java Champion, a MongoDB 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 the US and Europe. 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, a MongoDB 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 en... 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

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

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

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

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

With a CS degree from the Polytechnic University of Madrid (UPM), David has been working in Software development for more than 20 years, taking part in projects for different projects in sectors like Banking, Defense, Services & Retail, Maritime and ground transport. Currently, David holds the position of Developer Advocate at AxonIQ.io

David also participates regularly in training sessions: he has been a Certified Spring Source Instructor from 2010 to 2015. Since 2011 he is one of the instructors for the advanced JavaSpecialist Courses in Spain.

Since 10 years ago, David has been also involved regularly with several tech communities, events and conferences both as organizer or/and as speaker. Currently is one of the organizers of the Madrid Java User Group and part of the technical committee for Lambda World (a functional programming conference) in Cadiz, South Spain. He was recognized as JavaChampion in January 2020.

He has been speaking at conferences like OpenExpo Europe 2019, Open Source Lisbon 2019, T3chFest (2014, 2016), JBCNConf (2015, 2016, 2017, 2018, 2021), Codemotion Madrid (2012, 2019), Codemotion Milan (2016), Voxxed Days Zürich (2016), OpenSouthCode (2017), Spring I/O (2011, 2012 2015), Liferay DEVCON (2018), Software Crafters Barcelona (2018).

He is also a regular speaker at several Java User Groups and local tech meetups like MadridJUG, MálagaJUG, CastellónJUG & deCharlas.com, MilanJUG, ValenciaJUG, VigoJUG, BarcelonaJUG, comunidad hispana de JUGs, MadridJS, Hackathon Lovers…

With a CS degree from the Polytechnic University of Madrid (UPM), David has been working in Software development for more than 20 years, taking part in projects for different projects in sectors like Banking, Defense, Services & Retail, Maritime and ... 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

Elias is a Senior Principal Engineer at Backbase with a background in software engineering, consulting, agile coaching, and tech lead. He helps software engineers to develop their quality mindset and deliver bug-free software. He specializes in Quality Engineering for backend, frontend, and mobile technologies. He's a writer, blogger, and loves to help the community by running meetups and sharing knowledge by giving presentations worldwide.

He's also a Java Champion, Oracle ACE for Java, Java Magazine NL editor, TDC Rockstar, and Browserstack Champion.

Elias is a Senior Principal Engineer at Backbase with a background in software engineering, consulting, agile coaching, and tech lead. He helps software engineers to develop their quality mindset and deliver bug-free software. He specializes in Quali... Show more

Nacho is a software engineer from Barcelona, fan of TDD and XP practices. He has been working with Java and other web technologies before the effect 2000 and had experience in different roles in the IT world now working at Dynatrace writing code to monitor applications. You may probably meet him before as founder of the Barcelona Java Users Group & the Java & JVM Barcelona Conference ( JBCNConf ). He enjoys spending time with his family, playing sports & improving his eXtreme Programming skills

Nacho is a software engineer from Barcelona, fan of TDD and XP practices. He has been working with Java and other web technologies before the effect 2000 and had experience in different roles in the IT world now working at Dynatrace writing code to m... Show more

Melissa is passionate about Java, DevOps and Continuous Delivery. She is currently Head of Developer Relations for JFrog, serves on the Continuous Delivery Foundation TOC, the CNCF Governing Board, the Technical Steering Committee of OPEA, and is a Co-Chair of the Interoperability SIG. She loves sharing her knowledge with the community as a developer, speaker, and author. Melissa has been recognized as a Java Champion and Docker Captain, is an international speaker at numerous events including KubeCon and DockerCon, and is co-author of the O'Reilly title, DevOps Tools for Java Developers.

Melissa is passionate about Java, DevOps and Continuous Delivery. She is currently Head of Developer Relations for JFrog, serves on the Continuous Delivery Foundation TOC, the CNCF Governing Board, the Technical Steering Committee of OPEA, and is a C... Show more

Notorious engineer at work and after hours, tracing meanders of the art of software engineering. Remote Software Gardener, mostly working in web-oriented Java gardens. Java Champion. Testcontainers Champion. Oracle ACE. 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. Remote Software Gardener, mostly working in web-oriented Java gardens. Java Champion. Testcontainers Champion. Oracle ACE. Programming usually in Java (s... Show more

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