Brian Vermeer
@brianvermeer.nl
Java Champion | JUG leader
NLJug & VirtualJug | Oracle ACE Pro | CS Master at Utrecht University | Java | Haskell | Security | Dutch Air Reserve | Views are my own
NLJug & VirtualJug | Oracle ACE Pro | CS Master at Utrecht University | Java | Haskell | Security | Dutch Air Reserve | Views are my own
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
November 25, 2025 at 9:26 AM
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Had an amazing time at #devoxxma 🇲🇦 in Marrakesh! The energy was incredible, and I was honored to deliver two security talks to an engaged audience. Thank you for the opportunity to connect!
November 19, 2025 at 7:43 PM
Had an amazing time at #devoxxma 🇲🇦 in Marrakesh! The energy was incredible, and I was honored to deliver two security talks to an engaged audience. Thank you for the opportunity to connect!
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
November 18, 2025 at 9:24 AM
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Zurich Closes: 1 December 2025
Devoxx Greece Closes: 30 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Java Conferences with closing CFP in the next 15 days:
No conferences found with closing CFP in the next 15 days.
If you want to add your conference, please submit it at https://javaconferences.org/
No conferences found with closing CFP in the next 15 days.
If you want to add your conference, please submit it at https://javaconferences.org/
November 11, 2025 at 9:24 AM
Java Conferences with closing CFP in the next 15 days:
No conferences found with closing CFP in the next 15 days.
If you want to add your conference, please submit it at https://javaconferences.org/
No conferences found with closing CFP in the next 15 days.
If you want to add your conference, please submit it at https://javaconferences.org/
Java Conferences with closing CFP in the next 15 days:
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
November 4, 2025 at 9:24 AM
Java Conferences with closing CFP in the next 15 days:
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Reposted by Brian Vermeer
🛡️ Understanding Prompt Injection with @brianvermeer.nl
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
October 29, 2025 at 3:00 PM
🛡️ Understanding Prompt Injection with @brianvermeer.nl
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
It is a great honor to return to Jfokus to teach about the security implications that arise from implementing AI systems, this time focusing on PI techniques.
🛡️ Understanding Prompt Injection with @brianvermeer.nl
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
Learn how attackers manipulate LLMs - and how to guard your AI from the tricksters of prompt injection ⚔️
👉 www.jfokus.se
#Jfokus #DeveloperConference #AI #Security #PromptInjection #LLM #CyberSecurity #Java
October 30, 2025 at 9:28 PM
It is a great honor to return to Jfokus to teach about the security implications that arise from implementing AI systems, this time focusing on PI techniques.
Java Conferences with closing CFP in the next 15 days:
Digital Crafts Day Closes: 31 October 2025
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Digital Crafts Day Closes: 31 October 2025
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
October 28, 2025 at 9:23 AM
Java Conferences with closing CFP in the next 15 days:
Digital Crafts Day Closes: 31 October 2025
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Digital Crafts Day Closes: 31 October 2025
JavaOne Closes: 11 November 2025
If you want to add your conference, please submit it at https://javaconferences.org/
How Chat Memory Manipulation Can Ruin Your AI System
foojay.io/today/how-ch...
foojay.io/today/how-ch...
How Chat Memory Manipulation Can Ruin Your AI System
Did you know that by tampering with chat history, you're able to make LLMs respond and execute functions that are out of policy?
foojay.io
October 28, 2025 at 7:44 AM
How Chat Memory Manipulation Can Ruin Your AI System
foojay.io/today/how-ch...
foojay.io/today/how-ch...
Java Conferences with closing CFP in the next 15 days:
Digital Crafts Day Closes: 31 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Digital Crafts Day Closes: 31 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
October 21, 2025 at 9:23 AM
Java Conferences with closing CFP in the next 15 days:
Digital Crafts Day Closes: 31 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Digital Crafts Day Closes: 31 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
October 14, 2025 at 9:22 AM
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 24 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Understanding Prompt Injection, but make it spicy: techniques, challenges, and advanced escalation. I demo roleplay attacks, schema pressure, link smuggling, and payload splitting. Video below. What guardrails are you using today? #AI #Security
www.youtube.com/watch?v=72e_...
www.youtube.com/watch?v=72e_...
Understanding Prompt Injection Techniques, Challenges, and Advanced Escalation by Brian Vermeer
YouTube video by Devoxx
www.youtube.com
October 13, 2025 at 5:26 PM
Understanding Prompt Injection, but make it spicy: techniques, challenges, and advanced escalation. I demo roleplay attacks, schema pressure, link smuggling, and payload splitting. Video below. What guardrails are you using today? #AI #Security
www.youtube.com/watch?v=72e_...
www.youtube.com/watch?v=72e_...
My talk “Understanding Prompt Injection” briefly had the top spot at @devoxx.com, very briefly. Nevertheless very happy with turnout in the room and the final score.
If you joined, thank you so much.
If you joined, thank you so much.
October 9, 2025 at 6:20 PM
My talk “Understanding Prompt Injection” briefly had the top spot at @devoxx.com, very briefly. Nevertheless very happy with turnout in the room and the final score.
If you joined, thank you so much.
If you joined, thank you so much.
Reposted by Brian Vermeer
Watching @brianvermeer.nl talking @devoxx.com about "advanced" prompt injection in AI and LLM's...
By just repeating the same prompt twenty times, it'll suddenly comply to your malicious prompt. Yes!
🫣 🔥
#Devoxx #hacking #NotSoSecure #AI
By just repeating the same prompt twenty times, it'll suddenly comply to your malicious prompt. Yes!
🫣 🔥
#Devoxx #hacking #NotSoSecure #AI
October 9, 2025 at 2:50 PM
Watching @brianvermeer.nl talking @devoxx.com about "advanced" prompt injection in AI and LLM's...
By just repeating the same prompt twenty times, it'll suddenly comply to your malicious prompt. Yes!
🫣 🔥
#Devoxx #hacking #NotSoSecure #AI
By just repeating the same prompt twenty times, it'll suddenly comply to your malicious prompt. Yes!
🫣 🔥
#Devoxx #hacking #NotSoSecure #AI
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
October 7, 2025 at 9:21 AM
Java Conferences with closing CFP in the next 15 days:
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Voxxed Days Ticino Closes: 21 October 2025
Voxxed Days CERN Closes: 21 October 2025
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
On my way to #PortoTechHub conference before joining the #Devoxx crowd. This will be an action packed week full of AI security stuff for Devs.
October 6, 2025 at 8:34 AM
On my way to #PortoTechHub conference before joining the #Devoxx crowd. This will be an action packed week full of AI security stuff for Devs.
Java Conferences with closing CFP in the next 15 days:
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
September 30, 2025 at 9:22 AM
Java Conferences with closing CFP in the next 15 days:
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
JCON EUROPE Closes: 10 October 2025
If you want to add your conference, please submit it at https://javaconferences.org/
On my way to @dev2next.bsky.social aka VenkatConf
September 29, 2025 at 9:28 PM
On my way to @dev2next.bsky.social aka VenkatConf
Reposted by Brian Vermeer
🚀 Join #dev2next 2025 during September 29 – October 2 for breakthrough developer insights, networking, and innovation.
We’re thrilled to announce that Oracle ACEs @brianvermeer.nl , @theguywiththeduketattoo.com , and Rodrigo Graciano will be sharing their expertise as speakers!
🔗 www.dev2next.com
We’re thrilled to announce that Oracle ACEs @brianvermeer.nl , @theguywiththeduketattoo.com , and Rodrigo Graciano will be sharing their expertise as speakers!
🔗 www.dev2next.com
September 26, 2025 at 4:44 PM
🚀 Join #dev2next 2025 during September 29 – October 2 for breakthrough developer insights, networking, and innovation.
We’re thrilled to announce that Oracle ACEs @brianvermeer.nl , @theguywiththeduketattoo.com , and Rodrigo Graciano will be sharing their expertise as speakers!
🔗 www.dev2next.com
We’re thrilled to announce that Oracle ACEs @brianvermeer.nl , @theguywiththeduketattoo.com , and Rodrigo Graciano will be sharing their expertise as speakers!
🔗 www.dev2next.com
Java Conferences with closing CFP in the next 15 days:
Jfokus Closes: 30 September 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Jfokus Closes: 30 September 2025
If you want to add your conference, please submit it at https://javaconferences.org/
September 23, 2025 at 9:21 AM
Java Conferences with closing CFP in the next 15 days:
Jfokus Closes: 30 September 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Jfokus Closes: 30 September 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Java Conferences with closing CFP in the next 15 days:
Jfokus Closes: 30 September 2025
ConFoo Closes: 21 September 2025
XtremeJ Closes: September 20, 2025
Ya!vaConf Closes: September 30, 2025
If you want to add your conference, please submit it at https://javaconferences.org/
Jfokus Closes: 30 September 2025
ConFoo Closes: 21 September 2025
XtremeJ Closes: September 20, 2025
Ya!vaConf Closes: September 30, 2025
If you want to add your conference, please submit it at https://javaconferences.org/
September 16, 2025 at 9:22 AM
Reposted by Brian Vermeer
Our noble orators laid down their scrolls and wrapped up JavaZone with a legendary JourneyZone. 🏛️⚔️ Ave, heroes of the arena!
September 8, 2025 at 9:03 AM
Our noble orators laid down their scrolls and wrapped up JavaZone with a legendary JourneyZone. 🏛️⚔️ Ave, heroes of the arena!
Love this slide from the presentation by @shelajev.bsky.social and @ericdeandrea.dev at @javazone.bsky.social
September 3, 2025 at 4:31 PM
Love this slide from the presentation by @shelajev.bsky.social and @ericdeandrea.dev at @javazone.bsky.social
Reposted by Brian Vermeer
During September 3 - 4, join JavaZone, one of the world's biggest Java conferences! Get to hear from our Oracle ACEs 👉
2025.javazone.no/en
@theguywiththeduketattoo.com @ixchelruiz.bsky.social @francoismartin.bsky.social @mthmulders.bsky.social @brianvermeer.nl
#OracleACE
2025.javazone.no/en
@theguywiththeduketattoo.com @ixchelruiz.bsky.social @francoismartin.bsky.social @mthmulders.bsky.social @brianvermeer.nl
#OracleACE
September 1, 2025 at 2:06 PM
During September 3 - 4, join JavaZone, one of the world's biggest Java conferences! Get to hear from our Oracle ACEs 👉
2025.javazone.no/en
@theguywiththeduketattoo.com @ixchelruiz.bsky.social @francoismartin.bsky.social @mthmulders.bsky.social @brianvermeer.nl
#OracleACE
2025.javazone.no/en
@theguywiththeduketattoo.com @ixchelruiz.bsky.social @francoismartin.bsky.social @mthmulders.bsky.social @brianvermeer.nl
#OracleACE