Real testing means catching the fire before it catches you 🔥 Enter Nicolas Fränkel at #geecon! From Testcontainers to vCluster to GKE, he'll show you how to build a CI/CD pipeline so solid that even Friday deploys will feel like a walk in the park.

#geecon #15 (May 14-16) in Kraków is shaping up to be legendary! It’s your last chance to join the lineup for our anniversary edition—submit your talk now! Apply here 👉 #GeeCON #CFP #Java #JVM

Missed the latest #geecon monthly? No worries, here’s the latest issue! 🎉 Check out new speakers, early bird ticket updates, and more! Catch up now before it’s too late!

Scaling microservices to thousands? Join @NSilnitsky at #geecon to learn how @Wix reinvented their approach with Single-Runtime—blending serverless flexibility with monolithic cost efficiency. Simplify infra and drive innovation

Your friend learns to complicate, and you step in to simplify. At #geecon, thanks to @jnabrdalik, we’ll learn how to use DDD without overengineering and how to fight the hype with universal, timeless ideas. Come and see how simplicity wins.

Dr. @heinzkabutz, #Java Champion & creator of The Java Specialists' Newsletter, is bringing his brilliance to #geecon! Expect wit, wisdom, and quirky Java insights in his must-see talk. Don’t miss it!

Ah, 🤓we still remember the day the internet exploded with excitement when you earned the title @MaritvanDijk77

At #geecon, the amazing @MaritvanDijk77, Java Champion and Developer Advocate at @jetbrains, will share an important insight: we spend more time reading code than writing it. Ready to level up your code-reading game and master those plot twists?

From writing algorithms to writing history: Mihaela Gheorghe-Roman balances it all. Industry pro (Java, Scala, C#), academic (Ph.D. in neural nets), and sports enthusiast. Join her at #geecon 2025 for a fresh take on Streams!

Data sync struggles, meet @gblaquiere: a Google Cloud virtuoso and Carrefour’s Data Architect. With 15+ years of Java, a passion for innovation and serverless solutions, he’s here to demystify global data platforms. Don’t miss his session!

Explore the world of #FunctionalProgramming with @adamwarski, co-founder of @softwaremill and open-source enthusiast. Is Java truly functional? Let’s dive into the essence of functional programming at #geecon 2025!

@headius Thanks for considering, Charles! 🚀 Your topics sound intriguing—definitely worth a CFP submission. We’d be happy to see your ideas in the mix. If you’d like to discuss specifics, feel free to drop us an email at speakers@geecon.org

100+ cool #Java tricks with @AdamBien! From globbing and SIMDs to emojis and LLMs – no builds, no dependencies, just pure code magic. Catch him at #geecon 2025!

Ready to guard the AI galaxy? 🌌 Martin Štefanko (@xstefank), @RedHat engineer, BrnoJUG leader & author of Quarkus in Action, joins #geecon 2025! Discover how to keep LLMs reliable and responsive, even in the toughest scenarios

☕️@ach_wie's team canceled 24/7 support because… there was nothing to support. 😲 What’s their secret sauce? The DNA of Highly Effective Teams. Not another Scrum talk—just pure insights on culture-driven success. Catch it at #geecon 2025!

What’s scarier than legacy code? Zombie code! Join @hansolo_ , JavaOne Rockstar & OSS wizard, at #geecon 2025 as he dives into the horrors of dead, zombie, and "why-is-this-here" code. Prepare for tools, tips, and a touch of code exorcism. #RefactorOrRun

At @GeeCON, the stage is aglow, For speakers with wisdom to show. Submit your talk, share your best, Join us for the 15th fest! 🎉

Meet Kubuś (the son of a JUG leader). One day, he might create a new programming language or revolutionize the IT world—but first, he needs our help. He still needs 500k PLN for surgery, and donations close tomorrow. Let’s support his journey!

Access GeeCON 2024 recordings & support Bartek’s son! If you haven't been at GeeCON donate 145 PLN (~35 EUR) at & get the videos. Let's show the strength of the Java community! #GeeCON #JavaCommunity #fundraiser #charity