CERN Java User Group @cernjug.bsky.social https://cern.ch/jug
@lihaoyi.com @lihaoyi.com 
@wroclawjug.bsky.social @wroclawjug.bsky.social 
Utrecht Java User Group @utrechtjug.bsky.social The official JUG of Utrecht and proud JCP Partner
TriJUG @trijug.dev Home of the Triangle Java Users Group (TriJUG) serving the Triangle region (Raleigh/Durham/Chapel Hill) of North Carolina, US. #java
Arc of AI Conference @arcofai.bsky.social Arc of AI Conference
Nate Schutta @nts.bsky.social Java Champion. Speaker. Author. Architecture Monkey. Storyteller.
http://ntschutta.io
Jakub Čecháček @jakub.cechacek.net Software engineer · @debezium.bsky.social Maintainer · Former Red Hat · Co-Organizer of @CZJUG.bsky.social
lefred @lefredbe.bsky.social Community Advocate at MariaDB Foundation - https://about.me/lefred
Vladimir Orany @telegraphic.dev Principal Software Engineer by day, The Telegraphic Developer by night
Brian Vermeer @brianvermeer.nl Java Champion | JUG leader
NLJug & VirtualJug | Oracle ACE Pro | CS Master at Utrecht University | Java | Haskell | Security | Dutch Air Reserve | Views are my own
Marit van Dijk @maritvandijk.bsky.social 💻 Software Developer | ☕🥑 Java Developer Advocate @ JetBrains | 🏆 Java Champion | 🎤 International Keynote Speaker | 👩💻 Pronouns: She/her
https://maritvandijk.com/
Arun Gupta @arungupta.bsky.social 
Kelsey Hightower @kelseyhightower.com Minimalist
JReleaser @jreleaser.org JReleaser - The quick and effortless way to release projects! https://jreleaser.org
Holly Cummins @hollycummins.com @IBM - Senior Principal Software Engineer, working on Quarkus. Java Champion, developer, author, #cloud surfer and maker. My views are my own.
Mattias Karlsson @matkar.bsky.social Jfokus founder, Java Champion, JUG leader, Software Vagabond, Family father, Motorcyclist & Kiva supporter. Check out @jfokus.bsky.social
Werner Keil @wernerkeil.bsky.social CATMedia Boss, Java JCP Award Winner, Spec Lead of JSR385 (Units of Measurement), JSR354 (Money), Eclipse UOMo Lead, W3C, Agile, DevOps, IoT, ITSecurity, JakartaEE Ambassador, Spec Committee Member, Author, Speaker, Husband, Father
Martin Stefanko @xstefank.bsky.social Principal SW engineer at RedHat, BrnoJUG leader, MicroProfileIO, QuarkusIO, smallrye_io, WildflyAS, JBoss, author of Quarkus in Action (http://mng.bz/7vl7)
David Král @davidkral.bsky.social Java Developer at Oracle, Member of the Helidon and several Jakarta projects
Sven Ruppert @svenruppert.com Java and Security by day, Bushcrafting by night
Microsoft @microsoft.com AI, Cloud, Productivity, Computing, Gaming & Apps ☀️
Bruno Souza @brjavaman.bsky.social Since 1995, helping software developers improve their careers and work on cool projects with great people!
Java Evangelist
JCP Executive
SouJava Leader
Sandra Ahlgrimm @sandraahlgrimm.bsky.social JUG Berlin, Senior AI and Java Advocate for GitHub Copilot in JetBrains and Eclipse
Ron Veen @ronveen.bsky.social Life Long (Java) Developer, Special Agent, Conference speaker and book author
Erik C. Thauvin @erik.thauvin.net The Truth is Out There! 👽
🔹 Software→ developer, 40+ years
🔹 France→ born & raised
🔹 Apple US→ in my early 20s
🔹 Companies→ sold a few
🔹 Consulting→ lots of
🔹 Java Linkblog→ ran for 7 years
🔹 Columnist→ Java Developer's Journal
🔹 Cancer→ survivor
Ken Finnigan @kenfinnigan.me Distributed systems builder, author.
https://www.commonhaus.org/ Council member.
Observability focused. Ex: @workday, @redhat.
Amateur genealogist.
Opinions are my own. he/him
Mastodon - @kenfinnigan@fosstodon.org
Foojay, the Friends Of OpenJDK @foojay.io Foojay.io is the central resource for the Java community’s daily information needs, a place for friends of OpenJDK, and a community platform for the Java ecosystem — bringing together and helping Java professionals everywhere.
Eclipse Foundation @eclipse.org Brussels-based member-driven non-profit supporting a global open source community. We host the Eclipse IDE, Jakarta EE, Adoptium, Open VSX and 400+ projects.
Kim Fletcher @kimfletcher.bsky.social Managing Director & co-founder of Re:Build | Event Operations & Community Leader | Ran Devoxx UK | Leader of the Virtual Java User Group
Johannes Bechberger @mostlynerdless.de OpenJDK hacker at SapMachine, works on hello-ebpf for fun
joschi @joschi.work 🦣 Mastodon: https://hachyderm.io/@joschi
🐙 GitHub: https://github.com/joschi
Quarkus @quarkus.io Supersonic Subatomic Java
Balkrishna Rawool @balarawool.bsky.social Java | Spring | OOP & FP |
Debugging apps using System.out.println() since 2003.
Kubernetes @kubernetes.io #Kubernetes: open source production-grade container orchestration management. #CNCF #K8s
LangChain4j @langchain4j.dev Effortlessly build LLM-powered applications in Java, including chatbots, agents, structured data extraction and RAG: https://github.com/langchain4j/langchain4j
@openlibertyio.bsky.social @openlibertyio.bsky.social 
Spring @spring.io 
Stéphane Nicoll @snicoll.be Proud husband. Software engineer. Working on the Spring team since 2014. Spring Framework, Spring Boot, https://start.spring.io. He/Him. snicoll.be
Nataliia Dziubenko @nataliiadziubenko.com 🇺🇦🇳🇱 Making cool stuff at Azul, passionate about everything Java & JVM https://nataliiadziubenko.com/
@rstoyanchev.bsky.social @rstoyanchev.bsky.social 
Christian Tzolov @tzolov.bsky.social Spring AI lead | MCP Java SDK maintainer | Spring Framework team at Broadcom
Rob Winch @rwinch.github.io Open source enthusiast; Project Lead for Spring Security
Sébastien Deleuze @seb.deleuze.fr Spring AI/Framework @ Broadcom, #WebAssembly since 2016, ex @mixitconf.org staff. https://seb.deleuze.fr
Martin Fowler @martinfowler.com Software Design Loudmouth. Works for Thoughtworks. Also hikes, watches theater, and plays modern board games. He/him.
host of https://martinfowler.com
Aki 💛💙 @logico-jp.dev 💖JVM (especially GraalVM), conference speaker, javelin thrower, JUDO black belt holder, and JJUG (Japan Java Users Group) board member. Also, a Cloud Solution Architect at Microsoft. All views are mine.
Blog: logico-jp.dev
X (a.k.a. Twitter) @logico_jp
Jan Vissers @jvissers.bsky.social Father of two, husband, Lead Principal Application Software Engineer at Oracle. Opinions are mine.
Brian Goetz @briangoetz.bsky.social Java Language Architect at Oracle. Author, Java Concurrency in Practice (http://amzn.to/2nzZnkl). Also, cats.
JetBrains @jetbrains.com On a mission to make software development a more productive and enjoyable experience. Make it happen. With Code.
Kevin Sutter @kwsutter.bsky.social (Retired) Architectural Lead for WebSphere's #JakartaEE and #MicroProfileIO solutions.
0xc1a35 @cl4es.bsky.social Work: OpenJDK/Java performance; https://github.com/cl4es
Arjan Tijms @arjan-tijms.bsky.social Director @OmniFishEE, Jakarta EE enthousiast, lead/committer of a variety of Jakarta EE projects, Java Champion, @OmniFaces co-founder.
David Heffelfinger @ensode.bsky.social Java Champion, Apache NetBeans PMC Member, Technical Author, Jakarta EE Consultant and Instructor.
Jeanne Göthberg @jeannego.bsky.social Organizing Jfokus and other awesome stuff, living in Stockholm, coming from France, raising two beautiful kids and enjoying it all. Opinions are my own.
Per Minborg @pminborg.bsky.social Java Core Library Team @Oracle (all opinions are my own alone).
OmniFish @omnifish.bsky.social Jakarta EE Consulting, @Glassfish and @Piranha_cloud Support from @Java_Champions and long time @JakartaEE experts.
https://omnifish.ee
@javachampions.bsky.social @javachampions.bsky.social 
Dirk Lemmermann @dlemmermann.bsky.social JavaFX Fan Boy. Java Champion. Java One Rockstar. Open Source Contributor. Freelancer. Consultant. Speaker. Entrepreneur.
Sergi Almar @sergialmar.com 
Azul @azulsystems.bsky.social Azul provides the world's most trusted Java platform, founded on open source and delivered by the world's largest independent Java engineering team, and is the only company 100% focused on Java.
Jim Grisanzio @grisanzio.bsky.social Building FOSS Communities https://grisanzio.com/ #foss #opensource
geecon @geecon.bsky.social Java and JVM based technologies, dynamic languages, enterprise architectures, patterns, distributed computing, AI and more
https://geecon.org/ Kraków, 14-15 May 2026
Fabio Niephaus @fniephaus.com Research Manager on the @graalvm.org team at Oracle. Graal Languages, Native Image, developer tools, GraalVM developer experience. Previously at @hpi.bsky.social, @googlecolab.bsky.social, and @matonguitars.bsky.social. Views are my own.
Sanne Grinovero @sannegrinovero.bsky.social Passionate about reliability, OSS, and efficiency. Java Champion, tech lead in the Quarkus and Hibernate communities, JVM/Linux explorer. Working at IBM, leading various R&D initiatives.
Sean Mullan 🏳️🌈 @seanjmullan.org OpenJDK Security Group Lead. Views my own.- B Tim Yates @bloidonia.com Manchester, ex-Gradle, ex-Micronaut, still JVM
Edwin Derks @edwinderks.bsky.social Java Champion | Architect | Writer | Speaker | Contributor for Jakarta EE and MicroProfile | Car Maniac | Extreme Dance & Metal Music Fan |
OpenRewrite by Moderne @openrewrite.github.io OpenRewrite recipes automate security vulnerability remediations, framework migrations, code compliance and more—across a growing language and technology ecosystem.
Maintained by Moderne.ai
GitHub: http://github.com/openrewrite
Micronaut Framework @micronautfw.bsky.social A modern, JVM-based, full-stack framework for building modular, easily testable #microservice and #serverless applications.
https://micronaut.io
Project Helidon @helidon-io.bsky.social A Java framework for writing microservices that run on a fast web core powered by Virtual threads. A Microprofile implementation.
Dmitry Kornilov @dmitrykornilov.bsky.social Oracle, Java, Helidon, Jakarta EE, open-source, speaker, writer
Emily Jiang @emilyjiang.bsky.social Java Champion, Book Author, MicroProfile Guru, Jakarta EE supporter
Kaya Weers @kayaweers.bsky.social Java developer with a great love for innovation | Conference speaker | Likes to play soccer and travel the world
Christian Grobmeier @grobmeier.de Java Champion & ASF VP Data Privacy. I write and speak about code, ethics, and what it means to build systems that last.
Logging Off? https://grobmeier.de
Sven Peters @svenpet.bsky.social Tech Culture Advocate at 🧢 Atlassian
Marcus Biel @bielmarcus.bsky.social Creator of a free Java Youtube course, international speaker, @dev_champions, #ADHD, indie hacker 
Tamas Cservenak @cstamas.bsky.social Resurrecting dead software, Apache Maven and alike.
Tanja @tanjaecliise.bsky.social 
Tanja Obradovic @tanjaeclipse.bsky.social Java Programs at Eclipse Foundation
OpenJDK @openjdk.org The place to collaborate on an open-source implementation of the Java Platform and related projects · https://openjdk.org
Kent Beck @kentbeck.com Independent I guess these days you'd say content producer, artist, programmer, musician, pokerist. More about me at https://KentBeck.com.
Mary Grygleski @mgrygles.bsky.social 
InfoQ @infoq.com Helping dev teams adopt new technologies and practices through news, podcasts, QCon conferences, and InfoQ online certification.
Barcelona Developers Conference @devbcn.bsky.social DevBcn conference
📌 Barcelona 🗓️ 8-10th July 2025
➡️ JVM, Python, JScript, DevOps, Agile, AI, Cloud
👩💻 800+ attendees 🌞 3 days 🗣️ 70 speakers
👉 https://www.devbcn.com
Sessionize.com @sessionize.com Easily manage Call for Papers, Speakers and Agenda for your conference!
JUG Dortmund @jug-dortmund.bsky.social Java User Group Dortmund - die JUG für Dortmund und das Ruhrgebiet
Meetup: https://www.meetup.com/de-DE/JUG-Dortmund/
Milen Dyankov @milendyankov.com 
Karl Heinz Marbaise (he/him) @khmarbaise.bsky.social Java Champion
Apache Maven PMC
Apache Software Foundation Member
Mojo Haus Member
Java Developer,
CI / CD Fan
Freelancer
Andres Almiray @andresalmiray.com I code for fun and help others in the process. Java Champion. Co-founder of Hackergarten & Hack.Commit.Push. Creator of JReleaser
🚀
@java-champions.bsky.social @java-champions.bsky.social 
Josh Long 🍃 @starbuxman.joshlong.com Spring Developer Advocate
Java Champion
Kotlin Google Dev Expert
https://YouTube.com/@coffeesoftware
https://github.com/joshlong
Benjamin Marwell ☕ @bmarwell.de #JakartaEE-Dev, Musician & Tech-Blogger.
Uses #Linux. @maven.apache.org PMC and ASF member.
IBM Champion 2022.
🏙️ are my own.
Simon Martinelli @martinelli.ch Java Champion, Vaadin Champion, Oracle ACE Pro, Published Author, International Speaker, Programming Architect, and Lecturer for AI-driven Software Engineering, Software Architecture, Java, Persistence, and DevOps.
https://martinelli.ch
Frank Delporte @frankdelporte.be Senior Technical Writer at Azul - Author of “Getting Started with Java on the Raspberry Pi” - Blogging, writing, podcasting, and experimenting about all things #Java and #JavaOnRaspberryPi - Java Champion
Ken Fogel @omniprof.bsky.social Java Champion, Retired CS teacher, Author of Transitioning to Java and the soon to be published Programming with Java, JChampions Conference lead organizer
Ken Kousen @kousenit.com Author, speaker, software developer, and technical trainer. Java Champion, teaches Java, Groovy, Gradle, Kotlin, Android, Spring. Publishes "Tales from the jar side" newsletter and YouTube channel
Michael Simons @rotnroll666.bsky.social 👨👩👦👦👨🏻💻🚴🏻 – Father, Husband, Developer, Athlete. Author of Spring Boot Buch, and DuckDB in Action with Manning. Java champion working at Neo4j on various integrations within the JVM ecosystem.
More: https://michael-simons.eu
Emmanuel Bernard @emmanuelbernard.com Open Source software engineer: Hibernate team, Quarkus co-founder and more. Cloud Services @ Red Hat.
Les Cast Codeurs founder. Java Champion...
Jeanne Boyarsky @jeanneboyarsky.bsky.social Software developer in NYC, Java Champion, FIRST FRC mentor, CodeRanch moderator, Toastmaster. Author of OCP Java Certification Study Guides and "Real World Java: Helping you Navigate the Java Ecosystem".
More about me at https://linktr.ee/jeanneboyarsky
Ivar Grimstad @theguywiththeduketattoo.com Java Champion | Jakarta EE Developer Advocate | The guy with the Duke tattoo
https://jakarta.ee/community/developer-advocate/