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Adam Bien
Freelancing Consultant
Freelancer: Author, JavaONE Rockstar Consultant, Java Champion, trainer: http://airhacks.live and http://airhacks.io
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Adele Carpenter
Software engineer and aviation enthusiast
Adele is a software engineer at Trifork Amsterdam, where she is working on backend systems for the educational sector. Most of her work day is spent in the JVM/Spring ecosystems. Adele got the coding bug later in life but since then has been making up for lost time, going from command line noob to employed software engineer in just one year. Her experiences both in and out of tech have given her a unique perspective on the art of programming together with humans, which she hopes is useful to other humans who program with humans.
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Aleks Seovic
Architect, Oracle Coherence
Aleks Seović is an architect at Oracle where he works on Oracle Coherence—a leading in-memory data grid product—and contributes to the Helidon microservices framework.
Most recently, Aleks led the design and implementation of the gRPC framework, CDI, and Eclipse MicroProfile support in Oracle Coherence. He currently leads the implementation of Oracle Coherence native clients, GraphQL support, and Helidon, Micronaut and Spring integration. -
Alex Lakatos
Developer Avocado
Alex Lakatos is a Developer Relations Manager for Fidel. In his spare time, he is a Mozilla Tech Speaker and has been a contributor to the Mozilla project for the past nine years, based in the UK. JavaScript developer building on the open web, he has been pushing its boundaries every day. You can check out his GitHub profile or get in touch on Twitter. When he’s not programming, ~he likes to travel the world, so it’s likely you’ll bump into him in an airport lounge~ he's trapped in the house, the same as everyone else.
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Alexandre Touret
Architect at Worldline
After almost twenty years in IT in Paris then Tours, I joined equensWorldline as software architect at the Acquiring department since 2018. All along my career, I had the opportunity to work on several functional and technical fields (development, architecture, production, ERP, training,...) and project management too. My business activity consists of coding, coaching developers and designing software architectures. Moreover, I appreciate sharing my skills and learning from my peers. My main expertise fields are software architecture and engineering.
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Andres Almiray
Seasoned Sourceror
Andres is a Java/Groovy developer and a Java Champion with more than 20 years 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 (Json-lib, EZMorph, GraphicsBuilder, JideBuilder). Founding member of the Griffon framework and Hackergarten community event. You can find him on twitter too as @aalmiray. He likes to spend time with his beloved wife, Ixchel, when not hacking around.
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Antoine CRASKE
Head of Architecture & Technology, La Redoute
Antoine Craske is passionate about strategy, innovation, technology, organization and systems. Head of Architecture & Technology at La Redoute, international e-commerce player. Tech Community organizer of TICE.Leiria, AKUG and QE Unit, active in open-source.
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Antón Rodríguez
Principal Software Engineer
Antón is Principal Software Engineer focused on Data Streaming and Stream Processing. He has experience working with different message brokers, event streaming platforms and stream processing frameworks. During his career, he specialized in building internal SaaS in big corporations to make complex technologies easily used and adopted by teams so they can build solutions to real business use cases. From the very beginning, Antón can help with governance, performance, adoption, training and any task related to system administration or backend development.
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Antonio Goncalves
Java Champion, developer, book author, on-line course creator, conference organiser
I am a senior developer living in Paris. I evolved in the Java EE landscape for a while and then moved on to Spring, Micronaut and Quarkus. From distributed systems to microservices and the cloud, today I help my customers to develop the architecture that suits them the best.
Aside from freelancing for my customers, I write books (Java EE and Quarkus), I create online courses, I talk at international conferences (Devoxx, JavaOne, GeeCon…), I write technical papers, articles and I co-present on the Technical French pod cast called Les Cast Codeurs. I've co-created the Paris JUG, Voxxed Microservices and Devoxx France. For all my work for the community I have been made Java Champion. -
Bouke Nijhuis
CINQ ICT, managing consultant
Bouke Nijhuis is a managing consultant at CINQ ICT. He likes to learn new things and he likes it even more to explain these to other people. Furthermore he is an international speaker and a committer of open source projects. You can reach him on Twitter at @boukenijhuis.
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Brian Vermeer
Developer advocate @ Snyk
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.
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Bruno Freitas
IT DevOps Director at Unilabs Portugal
Enthusiastic software engineer with years of experience in Java development applied in healthcare systems working closely with multiple partners, resolving key business critical issues.
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Charlotte Mach
Engineering Manager @ Container Solutions
Charlotte is currently an Engineering Manager at Container Solutions, working on projects using Kubernetes, various CI/CD tools and helping companies to be more cloud native while also managing a team of engineers.
After trying out various tech jobs during her studies, which got her a Master’s degree in Computer Science and a love-hate relationship with debugging, she moved on to work with Oracle Cloud in the Netherlands before joining CS. Both at work and outside of it Charlotte is passionate about learning and bad jokes. -
Chiamaka Okenwa
Software Engineer
Chiamaka Okenwa is a software engineer with a demonstrated history of working in the fin-tech space with a focus on product design and development. She is passionate about Java, women in technology and developer communities, serving as an International speaker and community organizer of unStack Africa and JVM Nigeria. Chiamaka enjoys speaking at events, such as java2Days, Github Africa meetup, London Java Community (LJC) meetup and the Tech(K)nowDay Conference.
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Daniel Kim
Senior Developer Relations Engineer, New Relic + President, Bit Project
Daniel Kim (He/Him) is a Senior Developer Relations Engineer at New Relic and the founder of Bit Project, a 501(c)(3) nonprofit dedicated make tech accessible to underserved communities. He wants to inspire generations of students in tech to be the best they can be through inclusive, accessible developer education. He is passionate about diversity & inclusion in tech, good food, and dad jokes.
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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. -
Elder Moraes
Developer Advocate, Red Hat
Elder helps Java developers to work on great projects by guiding them on how to build and deliver fast and available server-side applications. He is a Java Champion, the author of the “Jakarta EE Cookbook“, 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.
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Eugenia Zigisova
Gorillas, Senior Frontend Engineer
Eugenia is a web developer with experience working at such fintech startups as Raisin and N26. Currently, she is a senior frontend engineer at groceries delivery startup Gorillas. She is a web performance ambassador at work and a passionate hiker, nature, and sauna lover. Also, she has been an active tech community member since 2016 when she founded a Google Developer Group in Latvia and became a Women Techmakers Lead.
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Fabio Tiriticco
Reactive Architect | Tech Lead | Speaker & Community Manager | Bicycle & Bass Lines
Fabio is a software engineer, conference speaker, and community leader based in Amsterdam. While building his own start up, he fell in love with Akka, Scala, and Reactive systems, so much so that he founded the 2000-member strong Reactive Amsterdam meet up group. When not in front of a screen, he enjoys long distance bike rides and fingerpicking his guitar.
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Grace Jansen
IBM, Developer Advocate
Grace is a Developer Advocate at IBM, working with Open Liberty and Reactive Platform. She has been with IBM since graduating from Exeter University with a Degree in Biology. Grace enjoys bringing a varied perspective to her projects and using her knowledge of biological systems to simplify complex software patterns and architectures. As a developer advocate, Grace builds POC’s, demos and sample applications, and writes guides and tutorials. She is a regular presentor at international technology conferences and has recently authored a book on reactive systems. Grace also has a keen passion for encouraging more women into STEM and especially Technology careers.
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Graeme Rocher
Architect Oracle Labs
Graeme Rocher is the creator of several popular Open Source projects including Grails (https://grails.org) and Micronaut (https://Micronaut.io) and co-author of "The Definitive Guide to Grails" (Apress - http://apress.com/book/view/1590599950). Graeme currently works as an Architect at Oracle. Graeme is a member of the Java Champions (https://twitter.com/java_champions) and 2018 was awarded the Groundbreaker award by Oracle (https://developer.oracle.com/groundbreakers/) for his work on Open Source.
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Guillaume Laforge
Developer Advocate for Google Cloud
Guillaume Laforge is Developer Advocate for Google Cloud. He focuses on serverless technologies. He is also a Java Champion, and the co-founder of the Apache Groovy programming language.
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Guy Royse
Developer Advocate at Redis Labs
Guy works for Redis Labs as a Developer Advocate. Combining his decades of experience in writing software with a passion for sharing what he has learned, Guy goes out into developer communities and helps others build great software.
Teaching and community have long been a focus for Guy. He is President of the Columbus JavaScript Users Group, an organizer for the Columbus Machine Learners, and has even has helped teach programming at a prison in central Ohio.
In his personal life, Guy is a hard-boiled geek interested in role-playing games, science fiction, and technology. He also has a slightly less geeky interest in history and linguistics. In his spare time, he volunteers for his local Cub Scout Pack, goes camping, and studies history and linguistics.
Guy lives in Ohio with his wife, his three teenage sons, and an entire wall of games. -
Ivan SANTOS
La Redoute, Tech Lead DevOps
Passionate about working with innovative technologies, mainly with DevOps and SRE, for 21 years taking knowledge and learning about critical environments and e-commerce. Traveller, funny, black belt in Judo, surfer and starting a relationship with racquet sport Padel.
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Jayashree S Kumar
Staff software Engineer at IBM's India Software Labs
An IBM-Java Classes Library developer at IBM India's Software Labs. Current efforts are focused on fixing customer reported issues and security gaps on IBM Java Runtime. In a career spanning over 9 years, I extensively worked on IBM JDK’s Testing. Likes to write up know-hows focusing on What? Why? Where? n When?s. After dabbling with writing disclosures, is Evaluator at IBM’s Cloud Invention development team. Speaker at international conferences. In free time likes to browse, when not running behind her toddler.
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Johan Janssen
Software architect at Sanoma Learning
Johan is working as a software architect at Sanoma Learning. He has been working for various demanding companies where rapidly delivering high-quality software was very important. Johan regularly writes articles and presents about various subjects, but mainly around Java. He spoke in 20 countries at more than 40 different conferences such as JavaOne, GOTO Amsterdam/Berlin/Copenhagen, Devoxx BE/UK/PL, JavaZone, J-Fall, Jfokus, JavaLand, Scala Days Berlin/New York. Johan received the JavaOne Rock Star and Oracle Code One Star awards.
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Jonathan Vila
Java Champion, Engineer at Red Hat
Java Champion, Organiser at BarcelonaJUG and cofounder of the JBCNConf conference in Barcelona.
Working at Red Hat as Senior Software Engineer on the Middleware area, but I have worked as a (paid) developer since the first release of The Secret of Monkey Island, about 30 years ago. PMP certified by the PMI in Project Management.
Speaker at OracleCodeOne, DevNexus, DevConf.US, JConf Mexico, JConf Peru, VirtualJUG and other JUGs around the world.
Very interested in simulated reality, psychology and Java along with management technologies. -
José Paumard
Java Champion, JavaOne Rockstar
Passionate about programming computers for over 25 years, Jose made his debut in assembler and C, C for SIMD parallel machines before adopting Java as an object-oriented language. PhD in applied maths and computer science, assistant professor at the University Sorbonne Paris Nord for 25 years, Java Champion, JavaOne Rockstar, Jose also has a passion for education. He gives talks in major international Java conferences (JavaOne, Oracle CodeOne, Devoxx in Antwerp, Paris and London, DevNexus, GoTo). He wrote numerous technical articles on Java technologies for Java Magazine, Oracle Technolgy Network among other publication. He writes a blog, Java le soir, French documentary source on Java technologies for thousands of french speaking developers around the world. He is a member of the french Paris Java User Group, has been a co-organizer of the conference Devoxx France for three years, and disorganizer of JChateau, an unconference held in the Chateau of the Loire Valley. He maintains a french YouTube channel with more than 80 hours of Java courses. He is also a Pluralsight author in the Java space.
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Kathryn Kodama
Developer at IBM, Open Liberty Developer Experience Team
Kathryn is a software developer on the Open Liberty Developer Experience team at IBM Canada. She has contributed to a number of open-source projects within the MicroProfile and Jakarta EE community, such as the Language Server for MicroProfile, the Jakarta EE Language Server, and the MicroProfile Starter for VS Code. Kathryn has also contributed to the development of dev mode for Open Liberty, and corresponding editor plugins.
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Maarten Mulders
IT Architect @ Info Support
Passionate architect, senior developer and trainer; also Oracle Groundbreaker Ambassador. 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.
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María Arias de Reyna Dominguez
Senior software engineer at Red Hat
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 Red Hat where she focuses on Middleware and maintains Apache Camel and Syndesis.
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. -
Mark Heckler
Sultan of Spring
Mark Heckler is a Cloud Developer Advocate for Java & JVM Languages at Microsoft, conference speaker, published author, Java Champion, and Kotlin Developer Expert focusing upon developing innovative production-ready software at velocity for the Cloud and IoT applications. He has worked with key players in the manufacturing, retail, medical, scientific, telecom, and financial industries and various public sector organizations to develop and deliver critical capabilities on time and on budget. Mark is an open source contributor and author/curator of a developer-focused blog (https://www.thehecklers.com) and an occasionally interesting Twitter account (@mkheck).
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Mary Grygleski
Senior Developer Advocate at IBM and President of Chicago-JUG
Mary is a Senior Developer Advocate with the Websphere/Liberty technology team at IBM, with a focus on Liberty, MicroProfile, Reactive Java, Open Source, Cloud, and Enterprise Distributed Systems. She started working as a software engineer with C and Unix, then got into Java, Open Source, and web development in the new Millennium, and now she has ventured into Reactive, Mobile, and the DevOps space. In her previous incarnations, she worked for several technology product companies in the Route 128 Boston Technology Corridor as well the San Francisco Bay Area. She now resides in the Greater Chicago area, and is the President and Executive Board Member of the Chicago Java Users Group (CJUG). She is also an active co-organizers for the Data, Cloud and AI In Chicago, Chicago Cloud, and IBM Cloud Chicago meetup groups. Mary continues to be amazed by how software innovations can dramatically transform our lives. Despite the many challenges in an ever-evolving technical world, she gets energized by the constant change and believes that she has uncovered the pathway to staying young. She can’t wait to see what the next tech wave will be like.
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Maurice Naftalin
Grand Poobah, Morningside Light Ltd.
Developer, author, teacher. Forty years in computing. Co-author “Java Generics and Collections”, author “Mastering Lambdas”. Frequent conference speaker.
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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.
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Mikhail Kuznetcov
Chapter lead at ING
Fullstack dev with diverse experience in frontend ecosystem
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Mohamed Taman
Chief Solutions Architect @Effortel, Owner/CEO of SiriusXI, a Java Champion, Oracle Groundbreaker Ambassador, JCP member , Consultant, Speaker & Author
Adopts Java SE.next(), JakartaEE.next(), a JCP member, Was JCP Executive Committee member, JSR 354, 363 & 377 Expert Group member, EGJUG leader, Oracle Egypt Architects Club board member, speaks Java, love Mobile, Big Data, Cloud, Blockchain, DevOps.
An International speaker, books & videos author of “JavaFX essentials,” “Getting Started with Clean Code, Java SE 9”, and “Hands-On Java 10 Programming with JShell”, and a new book “Secrets of the Java Champion,” Won Duke’s choice 2015, 2014, and 2013 awards, and JCP outstanding adopt-a-jar participant 2013 awards. -
Nathaniel Schutta
Architect as a Service
Nathaniel T. Schutta is a software architect focused on cloud computing and building usable applications. A proponent of polyglot programming, Nate has written multiple books and appeared in various videos. Nate is a seasoned speaker regularly presenting at conferences worldwide, 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, Nate coauthored the book Presentation Patterns with Neal Ford and Matthew McCullough. Nate recently published Thinking Architecturally and Responsible Microservices both available as free downloads from VMware.
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Nicolas Fränkel
Developer Advocate @ Hazelcast
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.
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Reza Rahman
Principal Program Manager, Java on Azure at Microsoft
Reza Rahman is Principal Program Manager for Java on Azure at Microsoft. He works to make sure Java developers are first class citizens at Microsoft and Microsoft is a first class citizen of the Java ecosystem.
Reza has been an official Java technologist at Oracle. He is the author of the popular book EJB 3 in Action from Manning Publishing. Reza has long been a frequent speaker at Java User Groups and conferences worldwide including JavaOne and Devoxx. He has been the lead for the Java EE track at JavaOne as well as a JavaOne Rock Star Speaker award recipient. He was the program chair for the inaugural JakartaOne conference. Reza is an avid contributor to industry journals like JavaLobby/DZone and TheServerSide. He has been a member of the Java EE, EJB and JMS expert groups over the years. Reza implemented the EJB container for the Resin open source Java EE application server. He helps lead the Philadelphia Java User Group. Reza is proud to be a founding member of the Jakarta EE Ambassadors. -
Ricardo Ferreira
Principal Developer Advocate
Ricardo is Principal Developer Advocate 🥑 at Elastic—the company behind the Elastic Stack (Elasticsearch, Kibana, Beats, and Logstash), where he does community advocacy for North America. With +20 years of experience, he may have learned a thing or two about Distributed Systems, Databases, Streaming Data, and Big Data. Before Elastic, he worked for other vendors such as Confluent, Oracle, Red Hat, and different consulting firms. These days Ricardo spends most of his time making developers fall in love with technology.
While not working, he loves barbecuing in his backyard with his family and friends, where he gets the chance to talk about anything that is not IT-related. He lives in North Carolina, USA, with his wife and son. Follow Ricardo on Twitter: @riferrei -
Rob Richardson
@rob_rich
Rob Richardson is a software craftsman building web properties in ASP.NET and Node, React and Vue. He’s a Microsoft MVP, published author, frequent speaker at conferences, user groups, and community events, and a diligent teacher and student of high quality software development. You can find this and other talks at https://robrich.org/presentations and follow him on twitter at @rob_rich.
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Roberto Cortez
Senior Software Engineer @ Redhat
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.
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Roy Braam
Founder @OpenValue Amsterdam. Software Developer/Architect @JPoint
Roy Braam is founder of OpenValue Amsterdam and Developer/Architect at JPoint. He loves Java, DevOps, and everything that comes with developing good solutions and teams.
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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.
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Simon Martinelli
Programming Architect at 72 Services LLC
Simon Martinelli is a passionate Java, performance optimization and application integration expert with more than 25 years of experience creating efficient programming solutions as a developer, architect, and technical lead.
An active member of the Java community process, he has made key contributions to JSR-352 Batch Applications, JSR-354 Money, and Currency API. In addition to coaching and teaching clients to optimize IT functions within business environments, he has been an Adjunct Professor at Berne University of Applied Science in Switzerland -
Sven Ruppert
Developer Advocate at JFrog
Sven Ruppert has been coding Java since 1996 in industrial projects, is working as Developer Advocate for JFrog and Groundbreaker Ambassador (former Oracle Developer Champion). He is regularly speaking at Conferences worldwide and contributes to IT periodicals, as well as tech portals.
He was working over 15 years as a consultant worldwide in industries like Automotive, Space, Insurance, Banking, UN and WorldBank. Additional to his main topic DevSecOps he is working on Mutation Testing of Web apps and Distributed UnitTesting besides his evergreen topics Core Java and Kotlin. -
Tom Cools
Software Developer @ Info Support
Geek in all facets of the word, including but not limited to boardgames, comic books but most of all programming. Developer without borders, both geographically and technically. Active as a consultant with a focus on Java technologies.
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Tom Granot
Solution Engineer at Lightrun
Tom is a solution engineer at Lightrun, where he works on re-shaping what production observability looks like. Tom was previously a site reliability engineer for a distributed systems startup, teaches technological prototyping for creatives at a local college's media lab, and is an avid explainer of all things tech.
You can follow him @TomGranot on Twitter. -
Victor Rentea
Java Champion and Trainer
Victor is a Java Champion and an Independent Trainer delivering intense webinars for dozens of companies worldwide. He loves Simple Design, Refactoring, and Unit Testing, about which he regularly talks at top conferences, but also to the Bucharest Software Craftsmanship Community that he founded. On victorrentea.ro you can find his blog, talks, training curriculum, live masterclasses, and social channels.
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Yee-Kang Chang
Developer, Developer Advocate, Architect, IBMer
Yee-Kang (YK) Chang is the lead developer advocate for IBM's application platform and the developer experience architect for Open Liberty. He contributes to various open source projects like Eclipse Language Servers for MicroProfile & Jakarta EE and Open Liberty and is keen on how we can make life easier for developers.