geecon

⏳ Last 2 days of lower prices at #geecon!

Join the #AI & #Agent revolution shaping the future of #JVM and #Java technologies.

Code. Connect. Inspire. 🚀 2026.geecon.org

Meet our speaker Adam Bien with a powerful talk: “The 50x Developer: Java’s Unfair Advantage in the Age of AI Agents”

Live coding with #AI #agents, real prompts & real mistakes.
2026.geecon.org/speakers/inf...

Speaker spotlight: @spencer.gibb.us - co-founder and lead of Spring Cloud Core who brings years of hands-on experience in distributed systems and cloud-native architectures.

From monoliths to microservices - and everything in between. Learn how architectures evolve 🚀
2026.geecon.org/speakers/inf...

We’re excited to welcome Adam Warski, co-founder of SoftwareMill and a well-known JVM & open-source expert.

How do you know your concurrent code really works—and that you didn’t just get lucky? Don’t miss this deep dive into safer concurrent programming on the JVM!

2026.geecon.org/speakers/inf...

What if non-player characters (NPCs) could think, talk, and evolve?
Alexander Chatzizacharias shows how multimodal RAG (text, images, audio) can bring game worlds to life — and what backend engineers can learn from it.
LangChain4j, AI villages & absurd fun included!
2026.geecon.org/speakers/inf...

Learning modern Java doesn’t have to be scary.
Java Champions Marit van Dijk & Piotr Przybył will show how to explore features like Structured Concurrency and Stream Gatherers the playful way.
Learn, experiment, and have fun! 🚀
2026.geecon.org/speakers/inf...
2026.geecon.org/speakers/inf...

Business won’t wait — and neither should your platform.
Java Champion Marcin Grzejszczak will share a real-world case on how platform teams turn infrastructure from a bottleneck into a business enabler.
Faster, safer delivery starts here.
2026.geecon.org/speakers/inf...

🚀 “Scotty, I need warp speed!”
Java Champion Gerrit Grunwald will explore modern ways to turbo-charge JVM startup & warmup — from CRaC and Native Image to Leyden, InstantOn & more.
No silver bullets, just smart choices for scale.
2026.geecon.org/speakers/inf...

⏳ Last day of #CFP for #geecon!
This is it — final hours to submit your talk and be part of #geecon. Don’t let “I’ll do it later” turn into “maybe next year”.

🎤 Submit now. Last chance.
🤝 2026.geecon.org/cfp/

Excited for “An Opinionated Guide to Bulletproof APIs with Java” by Rustam Mehmandarov (@rustam.no) — Java Champion, GDE for Cloud & Docker Captain.

Go beyond CRUD and learn 5 proven patterns for secure, observable, evolvable APIs using Jakarta EE & MicroProfile.
2026.geecon.org/speakers/inf...

⏰ Last 3 days of #CFP for #GeeCON!
Don’t miss your chance to share your ideas, stories, and experience with an amazing community of developers.

Submit now 👉 2026.geecon.org/cfp/

Josef Goldstein is joining us! Head of Big Data Platform R&D Wix, with 15+ years of experience building data-intensive SaaS systems. Josef will dive into AI-powered streaming with Apache Kafka &Flink, live inference in data streams, and challenges of latency and scale
2026.geecon.org/speakers/inf...

GeeCON is all about inspiring each other.
Share your knowledge as a speaker or join us to learn from the best at GeeCON 2026 in Kraków.
👉 2026.geecon.org
#GeeCON #Java #JVM #Community

Welcome back Steve Poole! 👋
In “The Enemy Within: How AI is Weaponizing Your Code”, Steve exposes the dark side of AI-generated code - from poisoned models to supply-chain attacks - and shows how to defend your software before it’s too late. #geecon #AI
2026.geecon.org/speakers/inf...

Join #geecon and meet Lucía Conde Moreno - Consultant Software Engineer at Info Support and AI Engineer at Aigency, a true Jack Of All Trades.
2026.geecon.org/speakers/inf...

Please welcome Jonathan Vila López - Developer Advocate, Community Leader, Java Champion, and international speaker.
Jonathan will present “Agents With Seatbelts: Practical Ways to Keep AI Code Generation Under Control”
2026.geecon.org/speakers/inf...

#GeeCON is now open for CFP submissions for the 2026 edition, happening on May 14–15! Step in, share your story, and inspire the community — submit your talk proposal on #Java, #AI, #SoftwareEngineering, #Microservices, #Cloud, #SoftwareCraftsmanship, or #Agile. 2026.geecon.org/cfp/

Save the dates – 14–15 May 2026. GeeCON is coming better than ever!
2026.geecon.org

🎥 Access GeeCON 2025 recordings & help our little friend Kuba!

If you couldn’t attend GeeCON, you can still donate ~35 EUR at 2025.geecon.org/recordings/ to get full access to the videos.

Let’s show the strength of the Java community once again! 💪

#fundraiser #charity #geecon

127 snippets selected for @geecon.bsky.social talk "The Best of Java Shorts Show: 100 Snippets in 45 Minutes" See you very soon in Room 1. #java #geecon

It is real! @adamdudczak.bsky.social @ @geecon.bsky.social !
Today in Cracov! Only in cinema!
Be there!

@geecon.bsky.social Go!

Familiar with Java streams? Time to take the next step! Ron Veen (@ronveen) at #geecon will reveal the secrets of Stream Gatherers and how to create advanced custom operations that transform data processing. Expect hands-on insights! 2025.geecon.org/speakers/inf...

Domain-Driven Design sounds great, but are we always building good models? Vadzim Prudnikau at #geecon will show how to avoid traps and mistakes that lead to… useless models. Get ready for some hard truths! 2025.geecon.org/speakers/inf...

Let’s welcome Viktor Gamov from Confluent, who will show at #geecon 2025 that stream processing in Java is more than tech – it’s a real adventure. Want to see how the pros do it? Don’t miss it! 2025.geecon.org/speakers/inf...

Join #geecon 2025 and meet Otavio Santana – Java master, open source leader, and Duke’s Choice Award winner! Discover how he simplifies database operations for modern architectures and inspires you to reach higher. Learn from a true innowator shaping the future. 2025.geecon.org/speakers/inf...

Thrilled to have Michał Gawarzyński, Engineering Manager @Allegro, join us to share his insights on “The Art of Trade-off”. Learn how Allegro’s marketing automation system processes 25,000+ incoming events...
2025.geecon.org/speakers/inf...

Excited to welcome Bazlur Rahman (@bazlur.ca) – Java Champion, author, and speaker – to our stage! Join his session, “Java + LLMs: A Hands-on Guide to Building LLM Apps in Java”, for a deep dive into harnessing the power of Java for large language model applications. 2025.geecon.org/speakers/inf...

Meet Piotr Łaskawiec at #geecon 2025! JVM expert and pragmatic problem-solver reveals how GenAI can work smoothly in your app. Join us and experience the future of software! 2025.geecon.org/speakers/inf...

Mads Opheim (@madsopheim.com) is about to take the #geecon stage! With political insight and a passion for modern practices, he’ll show how diverse experiences turn a developer into a leader who inspires others. 2025.geecon.org/speakers/inf...