• Baruch Sadogursky

    Baruch Sadogursky

    Head of DevOps Advocacy @jfrog

    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.

  • Dmitry Aleksandrov

    Dmitry Aleksandrov

    Senior Principle Developer

    Dmitry is a Senior Principle Developer at Oracle, Java Champion, Oracle Dev Champion. He has more than a decade experience mainly in Java Enterprise in banking/telecom, but interested in dynamic languages on JVM and features like massive computations on GPUs. A true believer in open source and community driven initiatives. He is a co-lead of the Bulgarian Java User Group and co-organizer of jPrime Conf.
    Dmitry is a blogger and also a frequent speaker at local events as well as conferences like JavaOne, Devoxx/Voxxed and Joker/JPoint.

  • Holly Cummins

    Holly Cummins

    Senior Principal Quarkus Software Engineer, Red Hat

    Holly Cummins is a Senior Principal Software Engineer on the Red Hat Quarkus team. Before joining Red Hat, Holly was a long time IBMer. In her time at IBM, Holly has been a full-stack javascript developer, a WebSphere Liberty build architect, a client-facing consultant, a JVM performance engineer, and an innovation leader. During her time in the IBM Garage, Holly led projects for enormous banks, tiny startups, and everything in between. Holly has used the power of cloud 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 is also a Java Champion, author, and regular keynote speaker.

  • José Paumard

    José Paumard

    Java Champion, JavaOne Rockstar

    José works as Java Developer Advocate at Oracle. PhD in applied maths and computer science, assistant professor at the University Sorbonne Paris Nord for 25 years, he is a Java Champion Alumni and JavaOne Rockstar. He is a member of the Paris Java User Group, has been a co-organizer of the conference Devoxx France, and is a disorganizer of JChateau, an unconference held in the Chateau of the Loire Valley. He works on the https://dev.java documentation and community website, publishes the JEP Café, a monthly video cast on YouTube, and maintains a french YouTube channel with more than 80 hours of Java courses. He is also a Pluralsight author in the Java space.

  • Kelly Jille

    Kelly Jille

    The lawyer who becomes a Java software engineer at Ordina!

    The lawyer who becomes a Java software engineer! Besides the magic of tech, she also loves people, health, sports, travelling and motorcycling. Driven by the 'why' question, her top sports mentality and her belief in the power of together, she tries to make the world a little more compassionate every day.

  • Miško Hevery

    Miško Hevery

    CTO at @builderio , creator of @QwikDev , @angular , @angularjs , co-creator of #karmajs

    Miško Hevery is the CTO at Builder.io, where he is helping to empower anyone to create blazing fast sites. Previously he has worked at Google, where he created Angular, AngularJS and was co-creator of Karma. Before focusing on making the web better, he brought testing culture to Google and the world through his blog. Miško started his career by designing digital circuits and moved to databases, full-stack development, and finally, front-end frameworks, giving him a unique perspective. He understands all of the layers from the web down to a transistor.

  • Olga Maciaszek-Sharma

    Olga Maciaszek-Sharma

    SEnior Software Engineer, Spring Cloud, VMware

    Olga Maciaszek-Sharma is a Senior Software Engineer in the Spring Cloud Team at VMware, where she works primarily on Spring Cloud LoadBalancer, Spring Cloud Contract (of which she was the first user and one of the first contributors), Spring Cloud OpenFeign, Spring Cloud Square and Spring Cloud Netflix projects. She also works on native image support for Spring Cloud projects. She programs mostly using Java and Groovy. Before switching to working full-time on open-source libraries and frameworks, she has gained experience working with microservices where cutting-edge solutions were used as well as with complex legacy systems, implementing both new business features and tools aimed at improving the process of continuous deployment and setup of applications. Olga is also a contributor to various other OSS projects, including RestAssured, JFairy, Jenkins Pipeline Plugin, Jenkins Stash Pull Request Builder Plugin, and others. Before switching to development, she worked for more than 3 years as a Quality Assurance Engineer, specializing in test automation.

  • Patrycja Wegrzynowicz

    Patrycja Wegrzynowicz

    Form3 | Yon Labs

    Patrycja is a senior platform engineer at Form3, Financial Cloud, working on resilient multi-cloud connectivity between AWS, GCP, and Azure. She is also the founder of Yon Labs, a startup focusing on automated tools for detection and refactoring of security vulnerabilities, performance anti-patterns, or cloud issues and providing consultancy in Java and cloud technologies.

    She is a regular speaker at software conferences, including CodeOne, JavaOne, Devoxx, JFokus, and others. She was awarded an Oracle Groundbreaker Ambassador title in 2020 and 2021. She was also named as one of Top 10 Women in Tech in Poland in 2016.

    Her interests focus on automated software engineering, mainly static and dynamic analysis techniques to support software verification, optimization, and deployment.

  • Roberto Cortez

    Roberto Cortez

    JNation Team

    Roberto Cortez is a passionate Java Developer with more than 10 years of experience. He is involved within the Open Source Community to help other individuals spread the knowledge about Java technologies. He is a regular speaker at conferences like JavaOne, Devoxx, Devnexus, JFokus and others. He leads the Coimbra JUG and founded the JNation Conference in Portugal. When he is not working, he hangs out with friends, play computer games and spends time with family.

  • Simon Brown

    Simon Brown

    Independent Consultant

    Simon is an independent consultant specialising in software architecture, and the author of “Software Architecture for Developers” (a developer-friendly guide to software architecture, technical leadership and the balance with agility). He is also the creator of the C4 model for visualising software architecture, and the founder of Structurizr. Simon is a regular speaker at international software development conferences, and travels the world to help organisations visualise and document their software architecture.

  • Stephen Chin

    Stephen Chin

    Author, speaker, open-source hacker by night. Head of developer relations at @JFrog by day

    Stephen Chin is Senior Director of Developer Relations at JFrog, author of Raspberry Pi with Java, The Definitive Guide to Modern Client Development, and Pro JavaFX Platform.
    He has keynoted numerous Java conferences around the world including Oracle Code One (formerly JavaOne), where he is an 8-time Rock Star Award recipient.
    Stephen is an avid motorcyclist who has done evangelism tours in Europe, Japan, and Brazil, interviewing hackers in their natural habitat.
    When he is not traveling, he enjoys teaching kids how to do embedded and robot programming together with his teenage daughter.

  • Sven Peters

    Sven Peters

    Developer Advocate, Manfred

    Sven Peters, former developer advocate at Atlassian and MongoDB - now at Manfred, has been studying trends in software development for the last 15 years uncovering the cultural and technical attributes to help development teams work effectively and drive innovation. He has 20 years experience in writing code, leading teams, and sharing his experience with thousands of developers at uncountable conferences in 25+ countries.

  • Antón Rodríguez

    Antón Rodríguez

    Principal Software Engineer at New Relic

    Antón is a Principal Software Engineer focused on Data in motion. He has a passion for building high-throughput streaming systems and solving the challenges that come with them. He’s also a JUG organiser, blogger, podcaster and speaker.

  • Clement Escoffier

    Clement Escoffier

    Doing reactive stuff @ Red Hat

    Clement Escoffier (@clementplop) is a senior principal software engineer at Red Hat. He is a Java Champion and also acts as a Reactive Architect at Red Hat.
    Before joining Red Hat, Clement had several professional lives, from academic positions to management. He contributed to projects and products, touching many domains and technologies such as OSGi, mobile, continuous delivery, and DevOps. Clement has always been interested in software engineering, distributed systems, and event-driven architectures. More recently, he focused on Reactive Systems, Cloud-Native applications, and Kubernetes. Clement is an active contributor to many open-source projects such as Apache Felix, Eclipse Vert.x, SmallRye, Mutiny, and Quarkus. I recently authored the "Reactive Systems in Java" book.

  • Daniel Afonso

    Daniel Afonso

    Developer Advocate at OLX Group

    Daniel is a Developer Advocate at OLX Group. His current interest is in React and JavaScript, and he advocates for better testing principles using the testing library. He has a full-stack background, having worked on different languages and frameworks on various projects from IoT to Fraud Detection. In his free time, when he's not learning new technologies or writing about them, he's probably reading comics or watching superhero movies and shows.

  • David Delabassée

    David Delabassée

    Software Evangelist - Server-side Java - Oracle

    David Delabassée is a Software Evangelist working for Oracle where he is focusing on Server-side Java… from Java EE/EE4J to Serverless and Java running in the Cloud. David is a seasoned speaker and regular presenter at JavaOne and other conferences on technical and software engineering topics. Prior to Oracle, he spent a decade at Sun Microsystems focusing on Java end-to-end. In his various roles, he has been involved in numerous Java projects since the early days of this technology.

    David lives in Belgium where, in his spare time, he tinkers with technologies such as home automation, electronics, pinballs, etc. But more importantly, he enjoys playing video games with his daughter!

  • Eliran Natan

    Eliran Natan

    R&D Software Architect at Axonius

    Eliran is a Software Architect with a passion for Computer Science & Software Design. He has led development teams in Tel Aviv, New York and Amsterdam, and today he is part of Axonius - an hyper growing cybersecurity unicorn that aims to revolutionize cloud security.

  • Georgios Andrianakis

    Georgios Andrianakis

    Principal Software Engineer @ Red Hat

    Georgios is a member of the core Quarkus team where he works in areas like RESTEasy Reactive, Spring compatiblity, Kubernetes support, testing among others

  • Gonçalo Pereira

    Gonçalo Pereira

    Member of Technical Staff at Anchorage Digital

    Gonçalo Pereira is a Member of Technical Staff at Anchorage where he builds support for various blockchain protocols and digital assets as part of the Asset Support team. With over seven years of experience in building technical solutions for business-critical applications in Customer Experience and Energy and Utilities, Gonçalo brings an important focus on security to Anchorage's blockchain systems integrations.

    Gonçalo completed his BS in Informatics and Computer Engineering at the University of Coimbra (FCTUC). In his spare time, Gonçalo works at a small after school program for students ages 11-18 interested in learning about programming and computer science.

  • Guillaume Smet

    Guillaume Smet

    Principal Software Engineer at Red Hat

    Guillaume is Principal Software Engineer at Red Hat and has spent his 20 years of career working with and on Open Source Software. Release manager for Quarkus, he puts a lot of efforts in improving the tooling for the project. He is also project lead of Hibernate Validator.

  • Ivar Grimstad

    Ivar Grimstad

    Jakarta EE Developer Advocate

    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 in the JCP Executive Committee.

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

  • Jan Martiska

    Jan Martiska

    Quarkus engineer

    I work at Red Hat as a software engineer, focusing on Quarkus, mainly the MicroProfile parts.

  • Ko Turk

    Ko Turk

    Blue4IT, Senior Java Developer

    Hi my name is Ko Turk and I am a Senior Java Developer at Blue4IT.
    I am working as a Fullstack engineer at the Rabobank, creating features in Kotlin and doing some Typescript ;).
    And as a speaker I like talking at international conferences and JUGs about Micrometer / Kafka and Kotlin!

    Best seen talk?! All talks with live coding in it! So that's the reason that I'm trying and doing it more often! 😉
    I hope you can appreciate!

    If you have some questions, don't hesitate to contact me through Twitter (@KoTurk77).

  • Loren Sands-Ramshaw

    Loren Sands-Ramshaw

    Language Runtime Engineer at Temporal

    Loren maintains Temporal's TypeScript SDK. They also wrote a book on GraphQL (The GraphQL Guide) and spent over a decade doing full-stack web and mobile development. They love swing dancing and authentic relating, and they secretly miss CoffeeScript 😄.

  • Martin Kouba

    Martin Kouba

    Principal Software Engineer at Red Hat

    Member of the Quarkus core team. Contributing mainly to ArC, Scheduler, Qute and gRPC extensions. Previously involved in the CDI specification and project lead of its reference implementation - Weld. Working with Java since 2007. Principal Software Engineer at Red Hat.

  • Mary Grygleski

    Mary Grygleski

    Streaming Developer Advocate at DataStax, Java Champion, President of Chicago-JUG

    Mary is a Java Champion and a passionate Senior Developer Advocate at DataStax, a leading data management company that champions Open Source software and specializes in Big Data, DB-as-a-service, Streaming, and Cloud-Native systems. She spent 3.5 years as a very effective advocate at IBM, focusing on Java, Jakarta EE, OpenJ9, Open Source, Cloud, and Distributed Systems. She transitioned from Unix/C to Java around 2000 and has never looked back since then. She considers herself a polyglot and loves to continue learning new and better ways to solve real-life problems. She is an active tech community builder outside of her day job, and currently the President of the Chicago Java Users Group (CJUG), as well as a co-organizer for several IBM-sponsored meetup groups in the Greater Chicago area.

  • Mete Atamel

    Mete Atamel

    Developer Advocate at Google

    I'm a Developer Advocate at Google, currently focused on helping developers with Google Cloud Platform. As a long-time Java and a recent C# developer, I like to compare the two ecosystems. Prior to Google, I worked at Microsoft, Skype, Adobe, EMC, and Nokia building apps and services on various web, mobile and cloud platforms. Originally from Cyprus, I currently live in Greenwich, not too far away from the prime meridian.

  • Michal Szynkiewicz

    Michal Szynkiewicz

    Principal Software Engineer at Red Hat

    Member of the Quarkus core team. Currently leading Quarkus extensions for gRPC and REST Client Reactive. Previously involved in MicroProfile specifications and implementations. Back-end developer, working with Java since 2007. Principal Software Engineer at Red Hat.

  • Nicolas Fränkel

    Nicolas Fränkel

    Developer Advocate for Apache APISIX

    Developer Advocate with 15+ years experience consulting for many different customers, in a wide range of contexts (such as telecoms, banking, insurances, large retail and public sector). Usually working on Java/Java EE and Spring technologies, but with focused interests like Rich Internet Applications, Testing, CI/CD and DevOps. Currently working for Hazelcast. Also double as a trainer and triples as a book author.

  • Phillip Krüger

    Phillip Krüger

    Software Engineer at Red Hat

    Hey, I’m Phillip. I’m a Software Engineer living in Victoria, Australia.

    I work for Red Hat, where I spend most of my time on MicroProfile, SmallRye and Quarkus

    I am a fan of technology, coffee and programming. I love dogs and music. To keep active I play squash. I was lucky enough to marry my best friend, Charmaine. She is also a geek 🙂


  • Rafael del Nero

    Rafael del Nero

    Java Champion

    Rafael del Nero is a Java Champion & Oracle Groundbreaker Ambassador, creator of the Java Challengers initiative and quiz master in Oracle Dev Gym, is the author of "Golden Lessons - 100 Insights to Overcome Life's Challenges and Achieve Your Career Dreams." Rafael believes there are many techniques involved in creating high-quality software that developers are often unaware of. His life's purpose is to help Java developers use better programming practices to code quality software for stress-free projects with fewer bugs.

  • Roy Derks

    Roy Derks

    Speaker and author on GraphQL, React and TypeScript

    Roy is an entrepreneur, speaker and author from The Netherlands and, in his own words, 'wants to make the world a better place through tech'. He has been giving talks and trainings to developers worldwide on technologies like GraphQL, React and TypeScript. Most recently he wrote the book Fullstack GraphQL.

  • Rustam Mehmandarov

    Rustam Mehmandarov

    Passionate computer scientist

    Passionate computer scientist. Java Champion and Google Developers Expert for Cloud. Public speaker. Ex-leader of JavaZone and Norwegian JUG – javaBin.

  • Stephane Epardaud

    Stephane Epardaud

    Principal Software Engineer — Red Hat

    From deep into the Nice mountains, Stéphane works for Red Hat on the Vert.x and Quarkus projects.

    Passionate hacker in Java, C, Perl or Scheme. A web standards and database enthusiast, he implemented among other things a WYSIWYG XML editor, a multi-threading library in C, a mobile-agent language in Scheme (compiler and virtual machines), and some Web 2.0 RESTful services and rich web interfaces with JavaScript and HTML 5.

    Eager to share, he is a frequent speaker at various conferences such as the Scheme Workshop, Nice University, Devoxx, JavaOne, JavaZone, JAX, many Java User Groups as well as the Riviera Java User Group he co-leads. A long-time open-source user and advocate, he worked on Ceylon, RESTEasy, Redpipe, Reactive Contexts, jax-doclets, stamps.js and various Play! Framework modules. He is also co-creator of the Riviera DEV conference.

    He now works full time on various Vert.x and Quarkus projects for Red Hat.

  • Steve Poole

    Steve Poole

    Developer Advocate, Security Champion

    Developer Advocate,Security Champion, DevOps practitioner (whatever that means) Long time Java developer, leader and evangelist. I’ve been working on Java SDKs and JVMs since Java was less than 1. Also had time to work on other things including various JSRs, being a committer on various open source projects including ones at Apache, Eclipse and OpenJDK. A seasoned speaker and regular presenter at international conferences on technical and software engineering topics.

  • Stuart Douglas

    Stuart Douglas

    Senior Principal Engineer at Red Hat

    Stuart has been working in open source for over a decade, and is one of the founders of Quarkus. He is also the founder of the Undertow project, the Servlet specification co-lead and previously was a core contributor to WildFly.

  • Tanja Obradovic

    Tanja Obradovic

    Eclipse Foundation, Jakarta EE Program Manager

    Tanja Obradović is the Jakarta EE Program Manager at the Eclipse Foundation. Having been involved with Java and Java EE for quite some time, revitalizing Enterprise Java and making it ready for cloud-native application development with Jakarta EE open source specifications is something that she is very much interested in.

  • Yoann Rodière

    Yoann Rodière

    Senior Software Engineer at Red Hat, Hibernate team

    Yoann Rodière is lead developer of the Hibernate Search project (http://hibernate.org/search/), and one of the main contributors to the Hibernate extensions (ORM, Search, Validator) in the Quarkus Java stack (https://quarkus.io/).

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