Author gallery

I am one of the co-founders of SoftwareMill, where I primarily code using Java, Scala, and other interesting technologies. I am actively involved in open-source projects, such as Ox, Tapir, sttp, Quicklens, ElasticMQ, and others. I have also been a speaker at major conferences, including JavaOne, Devoxx, GeeCON and ScalaDays.

Chapter Lead at AXA Konzern AG

Alex is a Senior Software Engineer, Lead Open Source Maintainer and Java Specialist at XDEV Software with a diverse background spanning many areas of software development. He has particular expertise in monitoring, security, privacy, integration testing, IDE development, Maven, Spring and Vaadin.

With over two decades of experience as a seasoned software architect, Alexandre Touret is fueled by a passion for technology, cloud computing, and software development. Throughout his career, he has designed, built, and managed systems of varying scales across a diverse range of industries, including insurance, financial services, and mobility. He takes great pleasure in sharing his insights and experiences with others, whether by teaching, speaking at conferences, organizing hands-on workshops, or writing articles. By engaging with the community, he aims to inspire and provide practical insights drawn from his hands-on experience.

Andres Sacco has been working as a developer since 2007 in different languages, including Java, PHP, NodeJs, Scala, and Kotlin. His background is mostly in Java and the libraries or frameworks associated with this language. In most of the companies he worked for, he researched new technologies to improve the performance, stability, and quality of the applications of each company. In 2017, he started to find new ways to optimize the transference of data between applications to reduce the cost of infrastructure. He suggested some actions, some applicable in all the manual microservices and others in just a few. All this work concludes with the creation of a series of theoric-practical projects, which are available on the page Manning.com Recently, he published a book on Apress about the latest version of Scala. He also published a set of theoretical and practical projects about uncommon ways of testing, such as architecture tests and chaos engineering.

Anshika has 10 years experience developing software at Posten Bring - Norwegian National Postal Service, building logistics systems and APIs that enable millions of people in the Nordics to order and receive packages. She values studying users, and fostering cross-departmental collaboration to demystify unruly & complex business rules. A typical day at work involves climbing stairs to the 17th floor of Posten Bring’s towering headquarters in the heart of Oslo, where she will transform whiteboard scribbles into deployed features. Off-duty you'll find her chasing sunsets and culinary adventures, sampling flavours from around the globe.

Head of Java/Kotlin Engineering at VirtusLab, Artur Skowronski has been in the industry for ten years. During this time, he has had the opportunity to work in various roles, such as Software Engineer, Tech Lead, Architect, and even Technical Product Manager. This diverse experience enables him to approach problems from a holistic perspective. He still loves to get his hands dirty - for more than two years, he has been publishing weekly reviews of events in the JVM world - https://jvm-weekly.com/

He´s a Software Engineer and a Developer Advocate at Google in London. He build tools, demos, tutorials, and give talks to educate and help developers to be successful on Google Cloud.

Balkrishna Rawool works as an Engineering Lead at ING Bank. He is also a frequent speaker at renowned tech conferences. He has passion for continuous learning and genuine desire to sharing knowledge. Although he has been working with Java for many years, he finds latest developments in Java quite exciting. In his free time, he enjoys playing chess. The analytical thinking and foresight used in chess is something he finds useful in software development.

Since 1995, Bruno has been helping Java developers advance their careers and work on exciting projects. A recognized Java Evangelist and Java Champion, as well as a board member of the Java Community Process, Bruno founded and leads SouJava, the Brazilian Java Users Society. In his book, “Developer Career Masterplan,” Bruno shares insights on career development for senior developers, topics he further explores in his Code4.life project.

As the Community Manager for Eclipse Adoptium, Carmen brings experience in project, operations, and financial management across various industries to help Adoptium working group members achieve their goals and objectives. Her background includes successful terms in healthcare, pharma, fintech, and tech startups. Additionally, She actively contributes to Step4ward, a mentoring program in Spain, demonstrating her commitment to fostering diversity and inclusion in the tech world.

Passionate about creating functional and efficient software, Alexandros Charos was introduced to the world of software engineering in his teenage years and has never stopped learning since. Currently, as a Software Development Manager at OPAP, Greece’s leading lottery and Sportsbook operator, Alex has over 15 years of experience in software engineering, specializing in distributed systems. He has led numerous successful projects worldwide, demonstrating expertise in designing and implementing scalable solutions. In his free time, he enjoys playing football, reading literature, and running.

Christian Grobmeier is an experienced Java developer, open-source advocate, and VP of Data Privacy at the Apache Software Foundation. He has contributed to key Apache projects, including Log4j, Commons, and Struts, and is actively involved in discussions around Java logging standards. As CEO of Grobmeier Solutions GmbH, he helps businesses build reliable, privacy-conscious software. Passionate about sustainable open-source practices and software security, he shares his insights at conferences, in publications, and through his writing on software ethics and leadership.

Christian Siebmanns is an expert in the development of enterprise web applications. He is passionate about user interfaces, because he is a strong believer that frontends should make people’s work easier, not harder.

Christian Woerz is a Software Engineer with over 15 years of experience as a developer. He writes code in Java, Kotlin, JavaScript and TypeScript. In his spare time he enjoys attending conferences where he shares his knowledge. He also frequently uploads advanced TypeScript videos to his YouTube Channel "Typed Rocks".

Chiara is a tech communicator with over 10 years of experience in producing technical content on a variety of topic related to the digital transformation. Her expertise includes automation engineering, robotics, software engineering and network technology. She holds a PhD for ETH Zurich and a MSc from the University of Southampton.

Dan Haywood is an independent consultant based in the UK, an ASF member and committer to Apache Causeway. He spends his days either cutting code or advising governments.

David is a globally recognized expert in the world of real-time data, messaging systems, and Big Data technologies. He is a distinguished committer on the Apache Pulsar project, showcasing his invaluable contributions to the advancement of this groundbreaking event streaming platform. As an accomplished author, David has penned the highly regarded book "Pulsar in Action," which serves as a definitive guide for those seeking to master the intricacies of Apache Pulsar. He is also a co-author of "Practical Hive," adding to his list of notable publications. With numerous speaking engagements around the world, David's influence and expertise extend far beyond his written work. His captivating and informative talks have enlightened audiences on a global scale, making him a sought-after authority on topics related to real-time data and messaging technologies.

I am a senior Java developer with 8+ years of experience, Oracle Ace, author, blogger, and conference speaker with a passion for Java development. I

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.

Dmitry Chuyko ist OpenJDK-Committer, Artikelautor und Sprecher auf internationalen Konferenzen. Seine früheren Erfahrungen bei Unternehmen wie Oracle und der Deutschen Bank haben gezeigt, dass die interessantesten Anwendungsprobleme in Verbindung mit der zugrunde liegenden Plattform gelöst werden können. Dmitrys Schwerpunkt bei BellSoft liegt auf der Optimierung der JVM für x86 und ARM sowie der Entwicklung kleiner, schneller und sicherer JDK-Container.

Erik Pronk is Managing Director of JDriven and a passionate software engineer. Primary focus on sharing knowledge and facilitating the personal and professional growth of colleagues and community members.

Francisco Contreras is an Experienced Chief Technology Officer with a strong background in managing and leading software development teams. Proven track record in the information technology and services industry. Expert in Agile methodologies, team management, project leadership, IT consulting, and driving technological innovation. Actively involved in community work as a co-organizer of the Java User Group Nicaragua and former organizer of Flutter Managua. Strong information technology professional with a Master's degree in Computer/Information Technology Administration and Management from Universidad Nacional de Ingeniería.

Franck Pachot is a Developer Advocate at MongoDB. He has extensive experience in database consulting for development and operations teams and is passionate about improving the developer experience, data modeling, and performance troubleshooting. Franck holds several certifications, including Oracle Certified Master and MongoDB Certified Associate Data Modeler, and is a recognized expert in PostgreSQL and YugabyteDB. Amazon acknowledges him as an AWS Data Hero.

Gaurav Gupta is a Senior Software Engineer at Payara and the creator of Jeddict, an innovative, open-source, AI-powered Jakarta EE application development platform. As an Apache NetBeans Committer and an Eclipse GlassFish Committer, Gaurav brings extensive expertise and dedication to advancing these key open-source tools. His focus on enhancing developer productivity and Jakarta EE standards through cutting-edge technologies highlights his commitment to the open-source ecosystem and his mission to empower developers worldwide.

Gautham Krishnan is a dedicated software professional boasting over 8 years of industry experience. Currently employed as a Software Developer at IBM Software Labs, he focuses on traditional WebSphere application server development. Additionally, Gautham actively contributes to the enhancement and maintenance of Open Liberty server, an esteemed open-source initiative at IBM. Prior to his role at IBM, Gautham served as an Applications Engineer at Oracle, where he contributed to the development of various Oracle Sales Cloud Suite products. Before his tenure at Oracle, Gautham gained valuable tech experience working across diverse domains such as insurance and investment banking.

A software engineer specialising in Java. I'm passionate about writing clean, maintainable code and solving complex technical challenges. I not only develop software but also work as a trainer, speaker, and open-source contributor, where I love sharing knowledge and helping others grow.

Gireesh Punathil is an IBM master inventor, Senior Technical Staff Member, committer or steering committee member for several leading open source projects. He is part of IBM Application Runtimes team that develops and supports websphere, java, eclipse and many other tools and frameworks. He spent a good share of his career in developing, porting and debugging platform tooling software: web servers, virtual machines, compilers, ide, monitoring agents and cloud components.

Giselle is a Developer Advocate at Restate, where she helps its users with understanding how Restate simplifies the development of resilient and scalable distributed apps. Before that, she worked in the field of big data analytics and distributed stream processing, and obtained a PhD on this topic at Ghent University.

Grace is a Java Champion and Developer Advocate at IBM, working with Open Liberty, MicroProfile and Cloud Technologies. 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 presenter at international technology conferences and has authored a book on reactive systems. Grace also has a keen passion for encouraging more women into STEM and especially Technology careers.

Li Haoyi graduated from MIT with a degree in Computer Science and Engineering, since then has built core infrastructure for high-growth companies like Dropbox and Databricks, and has been a major contributor to the open source community. His projects have over 10,000 stars on Github, and are downloaded over 20,000,000 times a month. Haoyi has deep experience in the JVM and has professionally built distributed backend systems, programming languages, high-performance web applications, and much more.

Responsibility, pragmatism, domain knowledge and professionalism. These are the core values and attributes that characterize successful software architects. Based on many years of project experience, Holger Tiemeyer imparts these skills and knowledge in his training courses, speaks about them at conferences and at Universities and publishes articles in specialist magazines. As a computer scientist with a minor in psychology, he volunteers at iSAQB e.V.

Igor currently works as a Software Engineer in a Data Engineer team. With over 20 years of experience with Java and over 10 years in the Big Data world, Igor had the opportunity to work with Hadoop and its ecosystem right when Hadoop was created. In his spare time, he enjoys playing with Raspberry Pi and is an active member of the Maker community, highly engaged with STEM and CoderDojo. Igor Organizes a Facebook group for Brazilian IT in Ireland with over 14k participants. He is currently working on a pet project where he uses a Led Strip to teach basic concepts of data structure e data streaming.

Ingo Düppe is an IT consultant and founder of CROWDCODE. He advises in the field of architecture management and is responsible for the realization and conception of web, mobile and cloud applications. The challenge is to find the right combination of technologies, methods and tools to suit the individual context. As a coach, he supports teams in the use of Java EE and Spring technologies and their efficient integration into the individual software development process.

JAVAPRO is the world's first free print magazine for Java, now also available as a free eBook. JAVAPRO is a project of the Java community for the Java community. At JAVAPRO, renowned authors and speakers from the international Java community write about the latest developments in Java, trends, tools, and best practices for professional application development with Java. In addition to articles, we regularly publish webinars, training sessions and videos on YouTube – for developers who want to share their expertise as well as for those looking to deepen their technical skills. Contributions from the community are always welcome – becoming an author is easy via javapro.io/become-an-author. JAVAPRO was founded in 2017 as a free print and online magazine in Germany. Today, we reach developers worldwide through javapro.io and actively support the community as the organizer of the Java conference JCON.

I joined Thoughtworks as a Lead Consultant Developer in September 2019 in the Spain office. I have 20 years of experience in the software industry, having worked in various sectors such as: - online travel agencies - the aerospace sector - public companies.

I help companies and developers create software with quality, design, and tests. I Have worked in software development for about 14 years, focusing on Java and Agile methods.

Senior Software Engineer at XDEV Software GmbH. As a grateful father of three and a Java developer, I love diving into open-source projects. I'm all about Spring, Quarkus, EclipseStore, AWS, and Kubernetes. It's where I thrive, tinkering and finding ways to make things work better.

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.

Julius Lauterbach is a Software Developer specializing primarily in Java backend development. Over the past few years, he has increasingly focused on blockchain development and has been working on integrating blockchain technologies into enterprise software solutions.

Julius Mischok is founder and CEO of Mischok GmbH. Together with his consulting team, he empowers project partners to implement complex software solutions.

Lize Raes is Product Manager and Developer Advocate at Naboo.ai, where she helps to build the developer productivity toolbox of the future. As collaborator at LangChain4j, she loves inspiring developers to apply AI in real-world applications. Committed to applying technology to societal challenges, Lize has embraced roles such as cochlear implant researcher at Ghent University, bioinformatics engineer for drug development software, and advisor to the Belgian government during COVID-19. In her free time, you will find her behind the piano or in her woodworking atelier.

Loïc Magnette is a seasoned software developer with a strong background in consulting. Currently a senior developer at Oniryx, he specializes in Java and Angular, delivering innovative solutions and sharing his knowledge as a speaker. As a co-organizer of the Belgian Java User Group (BeJUG), he fosters connections within the developer community. Outside of tech, Loïc’s passion for wildlife inspires his work and creativity.

Lokesh Chenta is a Senior Principal Software Architect at Sabre Corporation, specializing in scalable systems, cloud architecture, and Generative AI. With a strong foundation in software development and team leadership, Lokesh has successfully driven products from concept to launch. Passionate about innovation and continuous learning in AI/ML and emerging tech.

A Java developer that saw the light and embraced Clippy as his digital overlord. Over two decades in the field has taught Lucien how we often reinvent the wheel to accommodate new shiny frameworks. Now, as a Principal Consultant at Team Rockstars IT in the Netherlands, his mission is to discover elegant solutions for his clients. While we’ve moved beyond Flash and jQuery, the web platform technologies: HTML, CSS, and JavaScript remain essential. Rather than battling the platform, let’s embrace it. Lucien is a rewarded Google Developer Expert for Web Technologies and capabilities since 2022.

Luis Majano is a Computer Engineer, published author, and the founder and CEO of Ortus Solutions, Corp, a global consulting firm specializing in professional open-source development, web application architecture, and modern engineering tooling. He is the lead language engineer and creator of BoxLang, a dynamic, modern language for the JVM designed to power serverless, cloud-native, and cross-platform applications. Luis is also the creator of several widely adopted open-source projects, including ColdBox HMVC, ContentBox Modular CMS, TestBox BDD, and the CommandBox CLI, contributing to a portfolio of over 300 open-source tools and libraries. Since 2000, Luis has been deeply involved in designing and building software architectures and developer platforms. He is passionate about empowering developers through mentorship, education, and open-source innovation, promoting sustainable software practices. He is a frequent international speaker and community advocate, regularly sharing his insights at www.luismajano.com.

Lutske de Leeuw is a Software Engineer at Craftsmen, specializing in full-stack development with a focus on Java and Angular. Passionate about machine learning, board games, and cats. Committed to sharing knowledge so that everyone can benefit. Loves organizing events like Devoxx4Kids, ApeldoornJUG, JUG Noord, and other knowledge-sharing initiatives.

Senior Technical Architect hailing from India with over 18+ years of experience in the field. I hold a degree in computer science and specialize in Java, Spring, microservices, and AWS Cloud ecosystems. In addition to my professional endeavors, during my spare time, I am contributing to open-source projects for Spring Projects and OpenRewrite

Manoj Nalledathu Palat is an Open Source Lead/Committer working at IBM leading the Java Compiler in Eclipse (https://projects.eclipse.org/projects/eclipse.jdt/PL/mpalat) . In parallel, Represented Eclipse Foundation in the Experts Group for Platform JSRs for multiple Java SE [eg: https://openjdk.java.net/projects/jdk/21/spec/] and IBM in Eclipse IDE WG Steering Committee. Passionate about training (Worked as Professor of Practice from January 2024-Dec 2024 at NIT, Calicut), Provide training internally at IBM regularly, blogs sometimes (https://medium.com/@manojnp, ), mentors people. Holds a Masters degree in Computer Science from Indian Institute of Science(IISc), Bangalore and B-Tech in Computer Science from National Institute of Technology (Formerly REC) Calicut, India.

I'm a Senior Field Marketer with 15+ years of experience in B2B tech, starting at Microsoft and SAP. For the past 3 years, I’ve helped Azul drive growth across the EMEA region, delivering multiple field events and significantly boosting lead gen and customer acquisition.

Marián Varga is a co-author of the upcoming book Mastering RESTful web services with Java. He is building a community focusing on integration at love2integrate.com

Marin Niehues is Chief Strategy Officer at PLOIN GmbH and advises companies on how to combine strategy and working methods in a meaningful way. He shows how to achieve real success with a clear focus and solid structures.

Marius Stein is a freelance IT consultant and cloud engineer. He has many years of experience in advising companies on building cloud platforms and developing cloud-native systems. Additionally, he is a member of the program committee of the Cloudland Festival and co-organizer of the Cloud Native Computing Rheinland Meetup group.

Markus Kett and his teams have been working on IDE tools for Java and database development, as well as various open-source projects for 20 years. Markus is CEO and co-founder of MicroStream, the company behind the Eclipse open-source projects EclipseStore, Eclipse Serializer, and RapidClipse IDE. He is also the editor-in-chief for the free JAVAPRO magazine in Germany and the founder and co-organizer of the Java community conference series JCON. He is an independent editor for several magazines, and a speaker at numerous international developer conferences, user groups, and meetups.

Markus Westergren is a staff engineer with over 25 years of experience. During his work with large backend projects, Markus has repeatedly seen the big impact code quality has on the outcome of the projects and the careers of the developers working on them. Because of that, Markus focuses on helping professional Java back-end developers write maintainable code so that they become sought-after experts in the software development industry.

Principal software engineer at IBM, BrnoJUG leader, author Quarkus in Action, MicroProfile committer, Quarkus, SmallRye, Wildfly, JBoss middleware (RESTEasy, Weld, ...), programming and microservices enthusiast.

Martin Toshev is a solution architect and IT consultant conducting professional trainings for novice and experienced developers. He is a Java enthusiast and one of the leads of the Bulgarian Java User group (BG JUG) where he is one of the organizers of jPrime conference.

Merlin is a Software Engineer, Architect and Oracle ACE with over 10 years of experience in different domains and languages. His main focus is Java Enterprise Applications with modern and Next-Generation Java. As a Migration Engineer, he helps teams and individuals utilize new features and supports them in migrating. Besides developing, speaking at conferences and his parental role, he tries to participate in community events, teach folk to land gliders (yes, I am a Flight Instructor!) and play volleyball.

Mihaela is a Software Architect at Systematic, Romania, and an Oracle ACE Associate for Java. Ph.D in artificial neural network algorithms, Assistant Professor at the University of Cybernetics and Informatics in Bucharest, she is a dedicated lead developer and architect who enjoys sharing her knowledge. In her professional career, spanning over 14+ years, she worked for telecom and defence domains with a focus on Java, Spring Boot, C, C#, Scala and Angular. Apart from her passion for programming, she loves parrots, she is enthusiastic about traveling the world and doing a lot of sports, from running at marathons, martial arts and to different aerobic trainings.

Milan Savić is Software Engineer on a mission to bridge the gap between (usually unnecessarily) complex theories in software and reality. Tools he uses to achieve this goal involve writing code and blogs and speaking at conferences. He is an independent contractor working for AxonIQ where he implements Axon Framework and Server.

: I am a software developer specializing in Java and Kafka, with certifications in both. My passion for coding extends to contributing to two lovely open-source projects : JHipster and LangChain4j, where I enjoy collaborating with the community to drive innovation. When I'm not coding, you can find me practicing kickboxing, surfing in the summer, or working on my amateur manga series. I'm always eager to connect and collaborate on exciting projects!

Mohamed is a Software Engineer with over 15 years of experience in Java development. Throughout his career, he has successfully navigated diverse high-technology industries, including FinTech, Aerospace Manufacturing, Telecommunications and Healthcare. Passionate about open source contributions, Mohamed launched two impactful projects in November 2021: Froporec (https://froporec.org/) and Jisel (https://jisel.org/). In October 2023, Mohamed also introduced JAPO (Java Annotations Repo - https://japo.dev/), which marks the world's first search engine dedicated to searching and exploring Java annotations.

Mohammad-Ali A‘râbi is Software Engineer, Docker Captain, Author of "Docker and Kubernetes Security", Gamer, especially a huge fan of Fallout: New Vegas and Mortal Kombat series

Andreas Monschau works as a Senior IT Consultant at Haeger Consulting in Bonn. He has taken on various roles, ranging from software developer and software architect to test manager, team leader, and requirements manager. In addition, he leads Haeger Consulting's extensive trainee program and supports other companies in establishing similar processes.

Muaath Bin Ali is a Principal Software Engineer with over 15 years of experience. As the leader of RiyadhJUG, he regularly hosts speakers and Java champions worldwide. Muaath shares his insights through blogs on MezoCode.com and fooja.io, assisting Java developers in building real-world software architectures and excelling in their careers.

Natalie is a co-founder of Vidl Work. She serves as the company’s Chief Visionary Officer and oversees business development, strategy, and innovation. Additionally, she works directly with clients, providing consulting, training, and coaching services. Natalie has an MS in Wellness Promotion, has worked extensively in the fields of individual and team performance, and has 30 years of experience teaching, training, coaching and consulting. She is an industry-recognized Performance Coach, a sought-after keynote speaker, a certified Dare to Lead™ Facilitator and a certified coach with the Wellcoaches™ organization. Natalie has worked with numerous large, global organizations such as Johnson & Johnson and Deloitte as well as with the United States Airforce and Department of Defense. Natalie is an expert in the human side of work specifically bringing energy, connection and courage to work.

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. Also double as a trainer and triples as a book author.

Nina Nitzsche is an Agile Consultant and previous developer based in Berlin, with over 10 years of experience in agile software development. Passionate about fostering team collaboration, driving continuous improvement and empowering teams to achieve their full potential through agile methodologies.

Otavio is an award-winning software engineer and architect who is passionate about empowering other engineers with open-source best practices to build highly scalable and efficient software. He is a renowned contributor to the Java and open-source ecosystems and has received numerous awards and accolades for his work. Otavio's interests include history, the economy, travel, and fluency in multiple languages, all seasoned with a great sense of humor.

With over 20 years of hands-on experience in programming, Pablo is a well-versed professional who has successfully transitioned into leadership roles, currently serving as an Engineering Manager in Viaplay Group. He is dedicated to fostering collaborative environments and helping individuals discover more effective ways of working together, navigating challenges such as remote team collaboration and conflict resolution. Pablo provides a fusion of technical knowledge and leadership insights, based on years of practical experience, exploring the intersection of technology, management, and the human diversity that drive successful teams.

Peter Verhas is a senior software engineer and architect with an electrical engineering and economics background (MSC and MBA). He created his first programs in 1979 and has since authored several open-source programs. He has worked in several telecommunications and finance industry positions and was the CIO of the start-up index.hu during its early days. Peter is a developer and architect for EPAM Systems in Switzerland, supporting clients, developer training programs, and internal mentoring. Peter is the author of several Java books published by Packt and has a blog https://javax0.github.io You can follow Peter at https://twitter.com/verhas, https://www.linkedin.com/in/peterverhas/, https://github.com/verhas.

Passionate about solving business problems with technology, especially using Kotlin. He has extensive experience designing large-scale distributed applications. Believes that understanding the fundamentals of business and its model is key to building stable and maintainable systems. A pragmatist - likes to use the right tools for the right problems.

Raihan Nismara is a seasoned developer from Indonesia, He has been working as a web developer for more than five years now and has been focusing specialization on the front-end side development. He likes to share things such as knowledge and experience, so he built his own podcast called Codevcast (https://www.youtube.com/@codevcast).

I’m a software engineer with over seven years of experience across roles, industries, and countries, specializing in Java and Kotlin. Originally from Brazil, I lived in Portugal before moving to the Netherlands in 2022. I’ve worked as a developer, organized the Dutch Kotlin User Group, and now, as a Developer Advocate at Redis, I blend coding with education, advocacy, and community building.

Richard Fichtner is the Principal Software Architect at XDEV Software GmbH, with over 20 years of experience in the software industry. He works at the intersection of business and technology, contributing to the open-source community through projects like RapidClipse (https://www.rapidclipse.com) and advocating for best practices in Apache Maven. Richard is passionate about sharing knowledge on Java technologies, making him a frequent conference speaker. He leads the Java User Group Oberpfalz, co-organizes the JCON conferences (https://jcon.one), and has been recognized as a Java Champion, Oracle ACE Pro, IBM Champion and Vaadin Champion. With a Master of Science in Applied Computer Science, his expertise spans Java, clean code, cloud technologies, and pragmatic development practices, focusing on improving developer productivity through cloud solutions. Richard enjoys relaxing by a campfire and listening to/playing country music in his spare time.

Richard Gross is the head of software archeology at MaibornWolff. He drives forward topics such as software modernisation and technical excellence. As a team lead and architect, he helps teams to achieve a return on investment as early and continuously as possible. To achieve this, he coaches teams in code quality, test automation and collective ownership. His technical focus is on hexagonal architectures, TestDSLs, hypermedia APIs and the expressive and unambiguous modelling of the domain as code. Richard shares his knowledge through active pair programming, as well as training, technical articles and presentations at international conferences. He has also long been involved in the open source project CodeCharta, which enables non-developers to gain an understanding of the quality of their software.

Rijo works as a Java Chapter Lead based in the Netherlands. He possesses extensive experience in developing applications within the payments and credits sector of the banking domain. Rijo is originally from India and is now settled in the Netherlands.

Robert is a Solution Architect with a grounding in Observability and Application Security. He possesses over 25 years of experience as an developer, evangelist, trainer, and architect. His background includes Applications Performance Management and Embedded Systems. When he's not working, you can find him singing a cappella barbershop music or volunteering at a local animal shelter.

Rogerio Robetti is a software engineer with many years of experience, an enthusiast and advocate of modern approaches to software engineering. Has a soft spot for resource usage optimization and automation. Have worked in very heterogeneous environments and different roles from developer to architect and from startup size companies to global organizations, mostly producing enterprise grade web applications but also having experience in R&D, mobile and mainframe applications. Currently lives in Dublin, Republic of Ireland.

Romain Pelisse works at Red Hat for over a decade. He started as runtimes consultant, building on expertise on JBoss EAP (WildFly), and moved to engineering where he became the lead of the Ansible runtimes initiative, focusing on providing the best integration possible between Red Hat middleware solutions and Ansible Automation Platform.

Ron is a highly experienced software engineer who has seen it all, from Midrange Systems to Micro Services. Through all this, he is guided by his passion for software engineering and architecture. For more than 15 years he has been working on the JVM and the Java ecosystem and has seen all the frameworks and libraries from Apache to ZK. He is an Oracle Certified Java Programmer (OCP) and Sun Certified Business Component Developer (SCBCD/OCPBCD). Ron is an avid fan of alternative JVM languages like Groovy, Scala, Clojure, and his favorite, Kotlin. At Team Rockstars IT he is a Special Agent and senior developer who frequently speaks at international conferences. He is the author of a book on Java Cloud-native migrations with Jakarta EE and a just recently had a book published about Virtual Threads, Structured Concurrency, and Scoped Values.

Rory Preddy is a Principal Advocate at Microsoft, where he helps professional cloud developers discover and successfully use Microsoft’s platforms. He is a seasoned speaker whose talks are both meaningful and humorous, and he speaks around the world empowering developers to achieve more. Rory has over 25 years of experience in software development, working with various technologies such as Java, AI and Azure

Sascha Möllering is a Principal Specialist Solutions Architect for Containers at AWS, where he has been helping customers architect and optimize their cloud-native applications for nearly a decade. With a deep passion for container technologies, serverless computing, and Java development, he works with organizations across the globe to design and implement scalable, resilient solutions on AWS. A regular speaker at industry conferences and technical events, Sascha shares his expertise through hands-on workshops, blog posts, and technical content. His practical experience and technical depth have made him a trusted voice in the cloud-native community. He is particularly known for his work in containerization strategies and Java application modernization on AWS. When not architecting solutions or speaking at events, Sascha actively contributes to the technical community through writing, mentoring, and developing educational content that helps organizations navigate their cloud transform

Savi Grover is a Senior QA Automation Engineer with extensive expertise in software testing, automation frameworks and quality assurance strategies.

Sebastian Hempel is a self employed consultant and trainer from the north of Bavaria. Since 2003 he supports customers in developing and operating enterprise systems. His main focus lays in the development of systems in Java (JakartaEE and Quarkus) on Linux based systems.

Seasoned java developer, last years mostly focused on developer productivity engineering. Occasional open-source contributor, author and speaker.

Simon Ritter is the Deputy CTO of Azul. Simon joined Sun Microsystems in 1996 and spent time working in both Java development and consultancy. He has been presenting Java technologies to developers since 1999, focusing on the core Java platform as well as client and embedded applications. At Azul, he continues to help people understand Java and Azul’s JVM products. Simon is a Java Champion and a two-time recipient of the JavaOne Rockstar award. In addition, he represents Azul on the JCP Executive Committee, the OpenJDK Vulnerability Group, as well as the JSR Expert Group since Java SE 9.

Stefano Fago is an informatic passionate about distributed systems, software design, and software architectures with experiences as a consultant (in different contexts) and trainer (Java/J2EE), software designer, team leader, and speaker in some Italian meetups; interested in too many topics! Aficionado of the Commodore 64.

Steve Millidge is the founder, CEO and Technical Director of Payara Services. He is an expert in Java EE, Jakarta EE and MicroProfile, and a Project Lead for the Eclipse Foundation GlassFish and Jakarta EE platforms. Steve has spoken at a number of events about the performance and scalability of Java systems, including Java One, JBoss World, UK Oracle User Group Conference and Special Interest Groups, JaxLondon, GeeCon, EclipseCon, and Jakarta EE LiveStream. He regularly presents technical workshops and webinars on Jakarta EE, MicroProfile and big scale Java. Steve has been working with Java since pre-1.0 and has worked on large scale distributed applications and application servers since the 1990s. Before founding Payara Services, Steve ran a consultancy company providing advice and guidance on architecting, building and running at scale large web applications on Java technologies. Steve has a keen interest in non-functional attributes of big scale Java.

Steve Poole is an experienced JVM and Java Developer, Developer Advocate, DevOps Leader, and Security Champion with expertise in software supply chain security, AI, public speaking, education, and writing. An open-source contributor (Apache, Eclipse, OpenJDK) and developer relations expert. Regular presenter at international conferences on technical topics. Formerly with IBM and RedHat, with extensive experience from operating systems to JVMs to AI. Sci-fi lover, robot builder, and occasional mad scientist. Working with Java since its early days.

Thomas is a passionate software engineer with extensive experience in developing Java application servers for industrial companies such as Alcatel-Lucent and Nokia. He co-founded and served as CTO of Komyu, a consulting firm focused on cross-functional management and community development. Previously, Thomas held several roles at Thales, including Head of DevOps & IT and Inner Source Transformation Lead. Since joining the Eclipse Foundation in February 2024, Thomas has been the Program Manager for Development Tools, overseeing the Cloud Dev Tools and Open VSX working groups as well as Eclipse IDE.

Thomas Ronzon has been working as a project manager and senior software developer at w3logistics AG in Dortmund since 2000. He is primarily concerned with the modernization of business-critical logistics applications. He regularly publishes technical articles and speaks at conferences. Thomas is passionate about diving deep into technical aspects, but never loses touch with the business side of things. With a great deal of empathy, experience and concrete solution proposals, he repeatedly bridges the gap between business and IT.

Ties van de Ven is a software engineer with a passion for concepts, software engineering fundamentals and helping others. He combines these passions by doing public speaking, volunteer work for organisations like Devoxx4kids and codingcoach and working as a Software Quality Expert at Alliander.

Principal Solutions Engineer at VMware Tanzu by Broadcom with over a decade of experience in modern applications, DevSecOps, and AI.

Vadym Kazulkin is AWS Serverless Hero and Head of Development at ip.labs GmbH, a 100% subsidiary of the FUJIFILM Group, based in Bonn. ip.labs is the world's leading white label e-commerce software imaging company. Vadym has been involved with the Java ecosystem for over twenty years. His focus and interests currently include the design and implementation of highly scalable and available applications in AWS Cloud with the special passion for Serverless. Vadym is also the co-organizer of the Java User Group Bonn meetup and a frequent speaker at various Meetups and conferences.

Vipin Menon is a software professional with over 13 years of experience in the industry, specialising in a diverse range of technologies, including Java, React, Node.js, JavaScript, and various web and cloud technologies. Currently, he is contributing to the design and development of Application Performance Monitoring for Instana at IBM. A passionate advocate for open-source software, he has made significant contributions to projects such as OpenJDK, Node.js, and Swift. He played a pivotal role in implementing key security algorithms in IBM Java 11 as part of the integration of TLS 1.3 within the security module. With a strong focus on innovation, he holds six patents, one publication, and shares his insights through numerous blogs on technology topics, featured on platforms like Medium and other blogging platforms.

A passionate software engineer with over 20 years of experience and author of Software Architecture with Spring (Packt, 2025). Working with Java since 2001 and Spring since 2006, he holds Java and AWS certifications. He specializes in software architecture, microservices, and cloud-native systems, helping teams build scalable solutions while applying a philosophical lens to technical decision-making, constantly questioning the “why” behind each choice and its trade-offs. Wanderson holds a degree in Computer Science and MBAs from USP in Data Science and Software Engineering. He is currently preparing to pursue a master’s in Computer Science focused on Distributed Systems and Cloud Computing.

Wouter is a passionate Java developer at The Beehive. As a full stack developer, he excels at solving complex problems efficiently and always focuses on quality. He is known for his creativity and forward-thinking. He enjoys experimenting with new frameworks and technologies to make the best decisions for future projects. Beyond coding, Wouter is dedicated to coaching and mentoring his colleagues. He helps them improve by discussing project challenges and opportunities. In the past, Wouter has also taught programming courses at Karel de Grote Community College in Antwerp. His practical experience and love for learning make him a valuable asset to his team and the IT community.

Dr Yassine Benabbas is a DevRel @ Worldline and a teacher. He is a fullstack developer with 20 years of experience, including 10 years of mobile dev (native and cross platform). He loves sharing his passion about programming in different languages through lectures, blog posts and videos. He is a maintainer of the official technical Blog and YouTube channel of Worldline and he is a member of the Lille Android User Group. All his lectures materials are Open Sourced on GitHub and his blog posts are published on Medium, dev.to and blog.worldline.tech.