geecon
@geecon.bsky.social
Java and JVM based technologies, dynamic languages, enterprise architectures, patterns, distributed computing, AI and more
https://geecon.org/ Kraków, 14-15 May 2026
https://geecon.org/ Kraków, 14-15 May 2026
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...
From monoliths to microservices - and everything in between. Learn how architectures evolve 🚀
2026.geecon.org/speakers/inf...
February 16, 2026 at 9:27 AM
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...
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...
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...
February 12, 2026 at 10:15 AM
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...
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...
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...
February 12, 2026 at 9:49 AM
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...
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...
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...
February 10, 2026 at 11:36 AM
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...
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...
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...
February 10, 2026 at 9:51 AM
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...
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...
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...
February 6, 2026 at 10:10 AM
🚀 “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...
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/
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/
January 30, 2026 at 10:06 AM
⏳ 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/
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...
Go beyond CRUD and learn 5 proven patterns for secure, observable, evolvable APIs using Jakarta EE & MicroProfile.
2026.geecon.org/speakers/inf...
January 30, 2026 at 9:04 AM
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...
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/
Don’t miss your chance to share your ideas, stories, and experience with an amazing community of developers.
Submit now 👉 2026.geecon.org/cfp/
January 28, 2026 at 11:59 AM
⏰ 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/
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...
2026.geecon.org/speakers/inf...
January 28, 2026 at 11:29 AM
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...
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
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
January 22, 2026 at 8:13 AM
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
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...
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...
January 20, 2026 at 11:46 AM
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...
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...
2026.geecon.org/speakers/inf...
January 20, 2026 at 10:37 AM
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...
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...
Jonathan will present “Agents With Seatbelts: Practical Ways to Keep AI Code Generation Under Control”
2026.geecon.org/speakers/inf...
January 16, 2026 at 11:45 AM
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...
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/
November 18, 2025 at 10:29 AM
#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
2026.geecon.org
November 14, 2025 at 12:02 PM
Save the dates – 14–15 May 2026. GeeCON is coming better than ever!
2026.geecon.org
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
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
June 26, 2025 at 11:05 AM
🎥 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
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
Reposted by 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
May 14, 2025 at 10:13 AM
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
Reposted by geecon
It is real! @adamdudczak.bsky.social @ @geecon.bsky.social !
Today in Cracov! Only in cinema!
Be there!
Today in Cracov! Only in cinema!
Be there!
May 14, 2025 at 5:27 AM
It is real! @adamdudczak.bsky.social @ @geecon.bsky.social !
Today in Cracov! Only in cinema!
Be there!
Today in Cracov! Only in cinema!
Be there!
Reposted by geecon
May 14, 2025 at 8:10 AM
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...
May 13, 2025 at 3:01 PM
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...
May 13, 2025 at 10:30 AM
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...
May 13, 2025 at 6:24 AM
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...
May 12, 2025 at 12:39 PM
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...
2025.geecon.org/speakers/inf...
May 12, 2025 at 10:07 AM
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...
2025.geecon.org/speakers/inf...