Sebastian Kuehnau }>
@seb-vaadin.bsky.social
Vaadin Enthusiast & Developer Advocate
@vaadin.com 25 is out!
To celebrate, I built a simple real-time chat app — all in Java, no HTML/JS/CSS.
UI built with Vaadin’s built-in components.
▶️ Video below
📦 Source code: github.com/SebastianKue...
#Vaadin #Java #WebDev #UI
To celebrate, I built a simple real-time chat app — all in Java, no HTML/JS/CSS.
UI built with Vaadin’s built-in components.
▶️ Video below
📦 Source code: github.com/SebastianKue...
#Vaadin #Java #WebDev #UI
December 17, 2025 at 5:25 PM
@vaadin.com 25 is out!
To celebrate, I built a simple real-time chat app — all in Java, no HTML/JS/CSS.
UI built with Vaadin’s built-in components.
▶️ Video below
📦 Source code: github.com/SebastianKue...
#Vaadin #Java #WebDev #UI
To celebrate, I built a simple real-time chat app — all in Java, no HTML/JS/CSS.
UI built with Vaadin’s built-in components.
▶️ Video below
📦 Source code: github.com/SebastianKue...
#Vaadin #Java #WebDev #UI
Reposted by Sebastian Kuehnau }>
Today's #JCON Content Board Spotlight: Marcus Hellberg (Vaadin)
Another #JavaChampion within our board who has over 20 years of experience in combining modern web technologies and #Java
Whether hiking or exploring the next AI integration, he's fully committed.
Join #JCON2026 2026.europe.jcon.one
Another #JavaChampion within our board who has over 20 years of experience in combining modern web technologies and #Java
Whether hiking or exploring the next AI integration, he's fully committed.
Join #JCON2026 2026.europe.jcon.one
December 1, 2025 at 1:00 PM
Today's #JCON Content Board Spotlight: Marcus Hellberg (Vaadin)
Another #JavaChampion within our board who has over 20 years of experience in combining modern web technologies and #Java
Whether hiking or exploring the next AI integration, he's fully committed.
Join #JCON2026 2026.europe.jcon.one
Another #JavaChampion within our board who has over 20 years of experience in combining modern web technologies and #Java
Whether hiking or exploring the next AI integration, he's fully committed.
Join #JCON2026 2026.europe.jcon.one
#Figma ➝ real UI in #Java?
@vaadin.com’s webinar (Dec 2) shows how to do it with Copilot or design tokens/components.
Worth a look: pages.vaadin.com/from-design-...
@vaadin.com’s webinar (Dec 2) shows how to do it with Copilot or design tokens/components.
Worth a look: pages.vaadin.com/from-design-...
From design to prototype | Webinar
pages.vaadin.com
December 1, 2025 at 10:24 AM
#Figma ➝ real UI in #Java?
@vaadin.com’s webinar (Dec 2) shows how to do it with Copilot or design tokens/components.
Worth a look: pages.vaadin.com/from-design-...
@vaadin.com’s webinar (Dec 2) shows how to do it with Copilot or design tokens/components.
Worth a look: pages.vaadin.com/from-design-...
Ich spreche am 13.11. bei der #JUG Görlitz über @vaadin.com: Fullstack-Web mit Java – direkt, produktiv, ohne JS-Overhead.
📍 QESTIT Görlitz, 19 Uhr
📎 Infos: www.jug-gr.de/talks/2025-1...
#Java #WebDev #Vaadin
📍 QESTIT Görlitz, 19 Uhr
📎 Infos: www.jug-gr.de/talks/2025-1...
#Java #WebDev #Vaadin
Java User Group Görlitz
Website der JUG Görlitz. Wir organisieren regelmäßige kostenfreie Vorträge rund um das Thema Programmierung und Java
www.jug-gr.de
November 10, 2025 at 8:04 AM
Ich spreche am 13.11. bei der #JUG Görlitz über @vaadin.com: Fullstack-Web mit Java – direkt, produktiv, ohne JS-Overhead.
📍 QESTIT Görlitz, 19 Uhr
📎 Infos: www.jug-gr.de/talks/2025-1...
#Java #WebDev #Vaadin
📍 QESTIT Görlitz, 19 Uhr
📎 Infos: www.jug-gr.de/talks/2025-1...
#Java #WebDev #Vaadin
Enjoying todays morning show with @rene-wilby.de, Leif & Miikka talking about Hilla's integration into @vaadin.com Flow.
lnkd.in/dYPs3pCg
Disclaimer: No major changes. The core benefits of Flow—server-side UI with Java—will be enhanced, while client-side options will remain available as needed.
lnkd.in/dYPs3pCg
Disclaimer: No major changes. The core benefits of Flow—server-side UI with Java—will be enhanced, while client-side options will remain available as needed.
November 7, 2025 at 8:56 AM
Enjoying todays morning show with @rene-wilby.de, Leif & Miikka talking about Hilla's integration into @vaadin.com Flow.
lnkd.in/dYPs3pCg
Disclaimer: No major changes. The core benefits of Flow—server-side UI with Java—will be enhanced, while client-side options will remain available as needed.
lnkd.in/dYPs3pCg
Disclaimer: No major changes. The core benefits of Flow—server-side UI with Java—will be enhanced, while client-side options will remain available as needed.
🎉 We’re at @devoxx.com Antwerp!
Come visit the @vaadin.com booth and let's chat about building modern web apps in Java, explore what Vaadin can do, and see it in action.
👕 We’ve got T-shirts – come grab one!
💬 The Vaadin crew is looking forward to meeting you.
#Devoxx #Vaadin #Java #WebDev
Come visit the @vaadin.com booth and let's chat about building modern web apps in Java, explore what Vaadin can do, and see it in action.
👕 We’ve got T-shirts – come grab one!
💬 The Vaadin crew is looking forward to meeting you.
#Devoxx #Vaadin #Java #WebDev
October 7, 2025 at 6:20 AM
🎉 We’re at @devoxx.com Antwerp!
Come visit the @vaadin.com booth and let's chat about building modern web apps in Java, explore what Vaadin can do, and see it in action.
👕 We’ve got T-shirts – come grab one!
💬 The Vaadin crew is looking forward to meeting you.
#Devoxx #Vaadin #Java #WebDev
Come visit the @vaadin.com booth and let's chat about building modern web apps in Java, explore what Vaadin can do, and see it in action.
👕 We’ve got T-shirts – come grab one!
💬 The Vaadin crew is looking forward to meeting you.
#Devoxx #Vaadin #Java #WebDev
Reposted by Sebastian Kuehnau }>
Later today (12:00 CEST), Matti Tahvonen and I are going to dive into the mix of #SpringBoot, @vaadin.com, and #Pi4J for some #JavaOnRaspberryPi fun. Will you join us?
www.youtube.com/live/gtcXnA3...
www.youtube.com/live/gtcXnA3...
Pair Coding Session: Upgrade Pi4J Vaadin demo to the latest versions with Matti Tahvonen
YouTube video by Frank Delporte
www.youtube.com
September 23, 2025 at 5:39 AM
Later today (12:00 CEST), Matti Tahvonen and I are going to dive into the mix of #SpringBoot, @vaadin.com, and #Pi4J for some #JavaOnRaspberryPi fun. Will you join us?
www.youtube.com/live/gtcXnA3...
www.youtube.com/live/gtcXnA3...
Do you prefer reading @vaadin.com docs in Spanish, Chinese, German or Finnish? 📙
We just added AI-supported translations for the Vaadin documentation in those languages.
Not perfect yet – but already surprisingly helpful.
Check it out and let us know what you think: vaadin.com/docs/latest/
We just added AI-supported translations for the Vaadin documentation in those languages.
Not perfect yet – but already surprisingly helpful.
Check it out and let us know what you think: vaadin.com/docs/latest/
July 16, 2025 at 9:15 AM
Do you prefer reading @vaadin.com docs in Spanish, Chinese, German or Finnish? 📙
We just added AI-supported translations for the Vaadin documentation in those languages.
Not perfect yet – but already surprisingly helpful.
Check it out and let us know what you think: vaadin.com/docs/latest/
We just added AI-supported translations for the Vaadin documentation in those languages.
Not perfect yet – but already surprisingly helpful.
Check it out and let us know what you think: vaadin.com/docs/latest/
Reposted by Sebastian Kuehnau }>
New blog post: Using Kafka Streams and Interactive Queries to consume, aggregate and query streaming data in business web apps built with #Hilla (by @vaadin.com).
rene-wilby.de/en/blog/hill...
rene-wilby.de/en/blog/hill...
Hilla and Kafka. Part 3: Kafka Streams
Using Kafka Streams and Interactive Queries to consume, aggregate and query streaming data in the Hilla backend and visualize the data in the Hilla frontend in a reactive way.
rene-wilby.de
July 16, 2025 at 7:25 AM
New blog post: Using Kafka Streams and Interactive Queries to consume, aggregate and query streaming data in business web apps built with #Hilla (by @vaadin.com).
rene-wilby.de/en/blog/hill...
rene-wilby.de/en/blog/hill...
Reposted by Sebastian Kuehnau }>
New blog post: How to produce Kafka messages from user inputs in a web app using #SpringKafka, #SpringBoot, #React and #Hilla (by @vaadin.com) 👇
rene-wilby.de/en/blog/hill...
rene-wilby.de/en/blog/hill...
Hilla and Kafka. Part 2: Producing messages
Creating Kafka messages using Hilla's first-class form support and type-safety in the frontend and Spring Kafka and Spring Boot's auto-configuration capabilities in the Hilla backend.
rene-wilby.de
June 30, 2025 at 6:04 AM
New blog post: How to produce Kafka messages from user inputs in a web app using #SpringKafka, #SpringBoot, #React and #Hilla (by @vaadin.com) 👇
rene-wilby.de/en/blog/hill...
rene-wilby.de/en/blog/hill...
Reposted by Sebastian Kuehnau }>
I started playing with @vaadin.com and @quarkus.io today and I have to say I was surprise just how easy it was to build a UI! My years of Swing experience may be helpful, but it was super easy.
June 27, 2025 at 7:15 PM
I started playing with @vaadin.com and @quarkus.io today and I have to say I was surprise just how easy it was to build a UI! My years of Swing experience may be helpful, but it was super easy.
Reposted by Sebastian Kuehnau }>
How to connect a @vaadin.com flow ap with a rest service in core #java svenruppert.com/2025/06/24/c...
Connecting REST Services with Vaadin Flow in Core Java
1. Introduction Why REST integration in Vaadin applications should not be an afterthought In modern web applications, communication with external services is no longer a special function, but an in…
svenruppert.com
June 24, 2025 at 8:17 AM
How to connect a @vaadin.com flow ap with a rest service in core #java svenruppert.com/2025/06/24/c...
New in @vaadin.com 24.8: simplified Upload & Download APIs!
In this new video, I show how to use the new API 🎬 + share working code 💬
In this new video, I show how to use the new API 🎬 + share working code 💬
June 24, 2025 at 8:19 AM
New in @vaadin.com 24.8: simplified Upload & Download APIs!
In this new video, I show how to use the new API 🎬 + share working code 💬
In this new video, I show how to use the new API 🎬 + share working code 💬
Vaadin 24.8 is here 🎉
✨ Signals in Flow (feature flag)
📥 Upload & download made easy
🃏 Card component
📝 Markdown support
🧩 Better Forms & Master-Detail
🧠 Copilot reads your Figma custom components
💬 Kotlin nullability in Hilla
🔗 github.com/vaadin/platf...
✨ Signals in Flow (feature flag)
📥 Upload & download made easy
🃏 Card component
📝 Markdown support
🧩 Better Forms & Master-Detail
🧠 Copilot reads your Figma custom components
💬 Kotlin nullability in Hilla
🔗 github.com/vaadin/platf...
June 19, 2025 at 8:13 AM
Vaadin 24.8 is here 🎉
✨ Signals in Flow (feature flag)
📥 Upload & download made easy
🃏 Card component
📝 Markdown support
🧩 Better Forms & Master-Detail
🧠 Copilot reads your Figma custom components
💬 Kotlin nullability in Hilla
🔗 github.com/vaadin/platf...
✨ Signals in Flow (feature flag)
📥 Upload & download made easy
🃏 Card component
📝 Markdown support
🧩 Better Forms & Master-Detail
🧠 Copilot reads your Figma custom components
💬 Kotlin nullability in Hilla
🔗 github.com/vaadin/platf...
🎉 New in @vaadin.com 24.7: Easily align components left, center & right in a HorizontalLayout – no wrappers needed!
Group items individually to start, center, or end.
Check out my code demo!
Group items individually to start, center, or end.
Check out my code demo!
June 4, 2025 at 1:56 PM
🎉 New in @vaadin.com 24.7: Easily align components left, center & right in a HorizontalLayout – no wrappers needed!
Group items individually to start, center, or end.
Check out my code demo!
Group items individually to start, center, or end.
Check out my code demo!
Reposted by Sebastian Kuehnau }>
for my german reading follower.. published a post about CWE-22 CWE-377 and CWE-778 and how to harden against it. The demo is written in @vaadin.com Flow. javapro.io/de/erstellen... #vaadin #java #securecoding #cybersecurity #owasp
Erstellen einer einfachen Datei-Up/Download-Anwendung mit Vaadin Flow - JAVAPRO Germany
Vaadin Flow ist ein leistungsstarkes Framework zur Erstellung moderner Webanwendungen in Java, bei denen die gesamte UI-Logik serverseitig…
javapro.io
June 3, 2025 at 11:38 AM
for my german reading follower.. published a post about CWE-22 CWE-377 and CWE-778 and how to harden against it. The demo is written in @vaadin.com Flow. javapro.io/de/erstellen... #vaadin #java #securecoding #cybersecurity #owasp
Reposted by Sebastian Kuehnau }>
Small feature, big impact: @vaadin.com 24.8 will ship with a built-in component for rendering markdown 🥳
It integrates with the MessageList component and supports streaming content, giving you the building blocks for creating AI chatbots right out of the box vaadin.com/docs/latest...
It integrates with the MessageList component and supports streaming content, giving you the building blocks for creating AI chatbots right out of the box vaadin.com/docs/latest...
May 21, 2025 at 8:39 AM
Small feature, big impact: @vaadin.com 24.8 will ship with a built-in component for rendering markdown 🥳
It integrates with the MessageList component and supports streaming content, giving you the building blocks for creating AI chatbots right out of the box vaadin.com/docs/latest...
It integrates with the MessageList component and supports streaming content, giving you the building blocks for creating AI chatbots right out of the box vaadin.com/docs/latest...
Reposted by Sebastian Kuehnau }>
Secure file handling with Vaadin Flow.
Focused on:
🔐 CWE-22 – Path Traversal
📁 CWE-377 – Unsafe temp files
📉 CWE-778 – Weak logging
Use Java, NIO and structured logging to build safe upload/download flows.
#JavaDev #Vaadin #SecureSoftware #WebSecurity
svenruppert.com/2025/05/20/c...
Focused on:
🔐 CWE-22 – Path Traversal
📁 CWE-377 – Unsafe temp files
📉 CWE-778 – Weak logging
Use Java, NIO and structured logging to build safe upload/download flows.
#JavaDev #Vaadin #SecureSoftware #WebSecurity
svenruppert.com/2025/05/20/c...
Creating a simple file upload/download application with Vaadin Flow
Vaadin Flow is a robust framework for building modern web applications in Java, where all UI logic is implemented on the server side. In this blog post, we’ll make a simple file management ap…
svenruppert.com
May 20, 2025 at 3:42 PM
Secure file handling with Vaadin Flow.
Focused on:
🔐 CWE-22 – Path Traversal
📁 CWE-377 – Unsafe temp files
📉 CWE-778 – Weak logging
Use Java, NIO and structured logging to build safe upload/download flows.
#JavaDev #Vaadin #SecureSoftware #WebSecurity
svenruppert.com/2025/05/20/c...
Focused on:
🔐 CWE-22 – Path Traversal
📁 CWE-377 – Unsafe temp files
📉 CWE-778 – Weak logging
Use Java, NIO and structured logging to build safe upload/download flows.
#JavaDev #Vaadin #SecureSoftware #WebSecurity
svenruppert.com/2025/05/20/c...
Wheels down in Vienna and on my way to #JUG #Vienna to speak about @vaadin.com in action. See you later!
May 19, 2025 at 10:42 AM
Wheels down in Vienna and on my way to #JUG #Vienna to speak about @vaadin.com in action. See you later!
Last day at @jcon.one! Thanks to everyone who visited the @vaadin.com booth – great chats all week 🙌
🎤 9:00 AM: Practical AI in Java
by @marcushellberg.dev – don’t miss it!
Let’s wrap up JCON with some Java+AI power 💪
#Vaadin #Java #AI #WebDev
🎤 9:00 AM: Practical AI in Java
by @marcushellberg.dev – don’t miss it!
Let’s wrap up JCON with some Java+AI power 💪
#Vaadin #Java #AI #WebDev
May 15, 2025 at 6:54 AM
Last day at @jcon.one! Thanks to everyone who visited the @vaadin.com booth – great chats all week 🙌
🎤 9:00 AM: Practical AI in Java
by @marcushellberg.dev – don’t miss it!
Let’s wrap up JCON with some Java+AI power 💪
#Vaadin #Java #AI #WebDev
🎤 9:00 AM: Practical AI in Java
by @marcushellberg.dev – don’t miss it!
Let’s wrap up JCON with some Java+AI power 💪
#Vaadin #Java #AI #WebDev
📊 Which frameworks are Java devs using for new projects?
🚜 What drives their tech stack decisions?
Find the answers in our latest report
👉 vaadin.com/blog/conside...
🚜 What drives their tech stack decisions?
Find the answers in our latest report
👉 vaadin.com/blog/conside...
Key considerations for your new Java projects in 2025 | Vaadin
Planning a new Java project? Get expert insights from developers and tech leaders on modernization, team strategy, tooling, and cloud for 2025.
vaadin.com
May 14, 2025 at 2:45 PM
📊 Which frameworks are Java devs using for new projects?
🚜 What drives their tech stack decisions?
Find the answers in our latest report
👉 vaadin.com/blog/conside...
🚜 What drives their tech stack decisions?
Find the answers in our latest report
👉 vaadin.com/blog/conside...
In less then 0,00001 year live on Stage 6 at @jcon.one : Matti & Florian talking about Simple #WebDev with @vaadin.com and @eclipsestore.bsky.social
May 14, 2025 at 9:25 AM
In less then 0,00001 year live on Stage 6 at @jcon.one : Matti & Florian talking about Simple #WebDev with @vaadin.com and @eclipsestore.bsky.social
🚀 Day 2 at @jcon.one – thanks for all the great talks at the Vaadin booth yesterday! 🙌
Special guest: a real young star – Vaadin really is kid-friendly 😄
Don’t miss Matti’s talk today at 11:30:
Full-Stack Java with @eclipsestore.bsky.social + @vaadin.com
#Vaadin #Java
Special guest: a real young star – Vaadin really is kid-friendly 😄
Don’t miss Matti’s talk today at 11:30:
Full-Stack Java with @eclipsestore.bsky.social + @vaadin.com
#Vaadin #Java
May 14, 2025 at 7:05 AM
🚀 Day 2 at @jcon.one – thanks for all the great talks at the Vaadin booth yesterday! 🙌
Special guest: a real young star – Vaadin really is kid-friendly 😄
Don’t miss Matti’s talk today at 11:30:
Full-Stack Java with @eclipsestore.bsky.social + @vaadin.com
#Vaadin #Java
Special guest: a real young star – Vaadin really is kid-friendly 😄
Don’t miss Matti’s talk today at 11:30:
Full-Stack Java with @eclipsestore.bsky.social + @vaadin.com
#Vaadin #Java
Now live on Stage 6 at @jcon.one @samiekblad.bsky.social talking about "Modern Web Development with Java and @vaadin.com - From Fundamentals to Pro"
May 13, 2025 at 12:34 PM
Now live on Stage 6 at @jcon.one @samiekblad.bsky.social talking about "Modern Web Development with Java and @vaadin.com - From Fundamentals to Pro"