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Alexander, a 36-year-old Software Engineer at JDriven, holds dual Dutch and Greek nationality. He earned his master’s degree in Game Studies from the University of Amsterdam, where he discovered his passion for gamification and software engineering. Alexander aims to bridge the gap between game development and software engineering, believing that both industries have much to learn from each other. He is dedicated to integrating technologies and methodologies from both fields. Additionally, he enjoys experimenting with new technologies and cutting-edge sdk's.

Alina is a developer advocate for GraalVM at Oracle. Loves both programming and natural languages, compilers and performance, and open source. Ambassador of snacks and not running.

Asterios Kalogeras is a front-end engineer with a focus on building scalable, maintainable, and developer-friendly React applications. With five years of experience crafting full-stack solutions – primarily in React, TypeScript, and Node.js – he currently works as a Tech Lead at Netcompany, where he helps define front-end standards across teams. His day-to-day involves taming messy codebases, extending shared libraries, and mentoring developers on writing code that doesn’t haunt them later. He enjoys translating complex patterns into actionable advice, and evolving requirements into deliverable solutions.

Athanasios Ntavelis is a DevOps engineer at XM who started his career as a software engineer. With 12 years of experience across PHP, Go, Kubernetes and AWS, he leads a team of 18 engineers. His experience ranges from how a Go application handles termination signals to how to deploy a Kubernetes cluster on AWS with Terraform. These days he focuses on automating every part of the release pipeline and infrastructure provisioning, mentoring engineers, and defining the process his team runs on.

Dylan Beattie is a consultant, software developer and international keynote speaker. He's been building data-driven web applications since the 1990s; he's managed teams, taught workshops, and worked oneverything from tiny standalone websites to complex distributed systems. He's a Microsoft MVP, andhe regularly speaks at conferences and user groups all over the world.Dylan is the creator of the Rockstar programming language, the director of Ursatile, and the founder of The Linebreakers, the world's greatest tech comedy party rock band. He's online at dylanbeattie.net and on Bluesky as @dylanbeatt.ie.

Dr Heinz M. Kabutz is well known in the Java communities of Greece and abroad. He has been coding Java for almost 30 years, has written hundreds of Java Specialists' Newsletters - join us here: www.javaspecialists.eu.

Holly Cummins is a Senior Technical Staff Member on the IBM Quarkus team and a Java Champion. Over her career, Holly has been a full-stack javascript developer, a build architect, a client-facing consultant, a JVM performance engineer, and an innovation leader. Holly has led projects 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). She gets worked up about sustainability, technical empathy, extreme programming, the importance of proper testing, and automating all the things. You can find her at https://hollycummins.com, or follow her on socials at @holly_cummins.

Jen Looper is a creative technologist and educator with over 25 years' experience as a web and mobile developer and Developer Advocate. She is the Director of Developer Relations at Cloudinary and has worked as a software engineer and Developer Advocate at companies including Progress/Telerik and Microsoft, where she wrote viral curricula, and AWS, where she founded AWS Cloud Clubs for students globally. A published author, Jen has written Computer Science for Kids, a textbook aligned to CSTA standards for grades 6-8, as well as The Illustrated AWS Cloud, both published by Wiley. She's a multilingual multiculturalist with a passion for web technologies, applied machine learning and AI, and discovering new things every day. With a PhD in medieval French literature, Jen's area of focus is curriculum development and the application of sound pedagogy to technical topics. Visit Jen's personal site at https://www.jenlooper.com.

Josh (@starbuxman) has been the first Spring Developer Advocate since 2010. Josh is a Java Champion, author of 7 books (including "Reactive Spring") and numerous best-selling video training (including "Building Microservices with Spring Boot Livelessons" with Spring Boot co-founder Phil Webb), and an open-source contributor (Spring Boot, Spring Integration, Axon, Spring Cloud, Activiti, Vaadin, etc), a Youtuber (Coffee + Software with Josh Long as well as my Spring Tips series ), and a podcaster ("A Bootiful Podcast").

Jules May is a software architect, consultant, and project leader known for designing systems that simply don’t fail. His work spans from safety-critical aviation and automotive software to enterprise cloud platforms, from DSLs and compiler design to algorithmic toolchains.Starting his career in flight-control systems, Jules learned early that reliability isn’t a feature — it’s a necessity. That ethos has shaped a career focused on clarity, precision, and delivering technology that genuinely works.He’s the author of Extreme Reliability: Programming Like Your Life Depends on It and the originator of Problem Space Analysis, a practical framework for understanding and solving complex technical problems.Over the years, Jules has led engineering teams, advised global clients, and spoken at conferences across Europe on reliability, development culture, non-traditional computing and post-quantum security. He’s worked with organisations from start-ups to household names, building solutions that range from embedded systems to high-availability SaaS platforms. Currently, he’s leading the post-quantum cryptography transformation at a UK bank.A mathematician by training, a programmer by instinct, and a teacher by inclination, Jules brings a rare combination of theoretical depth and hands-on experience. Whether mentoring developers or shaping strategy as a fractional CTO, he focuses on one thing above all: making software that does what it’s meant to — every time.

Mary Grygleski is the Sr. VP of AI Evangelism at LuMay AI focusing on Enterprise AI architecture and market expansion. She is also a Technical Advocate and Global VP of the Western Hemisphere at the AI Collective, a nonprofit AI community and think tank.With 25+ years in software engineering and architecture, Mary has worked with organizations including IBM, Bank of America, and the Chicago Mercantile Exchange across Java, generative AI, cloud, and distributed systems. She is a frequent international speaker and an active community leader with the Chicago Java Users Group. Mary is also a Java Champion and Oracle ACE Associate.

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

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Sander Hoogendoorn is an independent dad, avid traveler, and lifelong software developer. With over 40 years of hands-on coding experience under his belt, he still ships code every day — because once a developer, always a developer.Currently the CTO at iBOOD, Sander has led technology at several companies over the past decade and was once Capgemini’s global agile thought leader. But don’t expect corporate buzzwords — Sander’s known for cutting through the fluff with a post-agile mindset and a healthy disregard for outdated best practices.He helps teams and organizations break rules that need breaking — replacing heavyweight processes with lightweight thinking, and agile dogma with actual flow. If something’s slowing your team down, chances are he’s already ranted about it in a keynote.Onstage, Sander brings code, stories, and sharp insights — whether he’s talking about disruption, continuous delivery, practical AI, microservices, monads (yes, really), software architecture, or the lost art of writing beautiful code. His talks are fast-paced, thought-provoking, and never just theory.Sander believes in small steps, critical thinking, and building stuff that works. No silver bullets. Just better software, made by better teams.

Accomplished technical leader and developer advocate with over three decades of experience in software engineering, DevOps, developer advocacy, and security, especially cybercrime and software supply chains. Recognised international public speaker and author on software supply chain security, AI, and cybercrime legislation, with a deep background in engineering and DevOps leadership. Proven track record in driving product innovation, improving development processes, and fostering vibrant open-source communities.

Sven Peters, AI evangelist at Atlassian, has been studying trends in software development for the last 20 years, uncovering the cultural and technical attributes that help development teams work effectively and drive innovation. He has 25 years of experience writing code, leading teams, and sharing his experience with thousands of developers at countless conferences in 30+ countries.

Ted is a big geek, and has been for quite a few years now. Find out more about him on his website, https://www.newardassociates.com .

Principal software engineer at Cadence

Dr. Venkat Subramaniam is an award-winning author, founder of Agile Developer, Inc., an instructional professor at the University of Houston, and creator of the dev2next and Arc of AI conferences.He has trained and mentored thousands of software developers in the US, Canada, Europe, Asia, and Africa, and is a regularly-invited speaker at several international conferences. Venkat helps his clients effectively apply and succeed with sustainable agile practices on their software projects.Venkat is a (co)author of multiple technical books, including the 2007 Jolt Productivity award winning book Practices of an Agile Developer. You can find a list of his books at https://www.agiledeveloper.com.

Yannis Koskinaris is a Senior Software Engineering Manager at BETA CAE Systems (part of Cadence). A lifelong Java engineer with an MSc in Systems Design for Internet Applications (2005), he has worked on SPDRM — BETA CAE's data and simulation process management platform — since its inception, guiding its architecture and evolution over nearly two decades. He leads a team focused on performance, reliability, and developer experience, and is passionate about server-side development, databases, and building systems that scale gracefully as they age.