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Marcus Hellberg @marcushellberg
Joined November 2008
  • Tweets 6,950
  • Following 730
  • Followers 3,511
1,745 Photos and videos
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Marcus Hellberg@marcushellberg
6 Jan 2025
Oh wow, what an honor 🤩 The Java community is amazing
Java Champions@Java_Champions
6 Jan 2025
Congratulations to new #Java Champion @marcushellberg
Marcus Hellberg as a new Java Champion!

ALT Marcus Hellberg as a new Java Champion!

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This is cool! There's now a Vaadin Aura theme preset gallery and theme builder: vaadin.github.io/web-compone… 🎉 The functionality will also be available in Vaadin Copilot shortly!
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Marcus Hellberg retweeted
Simon Martinelli
@simas_ch
May 3
A small experiment with Claude Code: Hotel room search, built twice. 1) Vaadin Spring Boot jOOQ Testcontainers PostgreSQL: 3 minutes. 2) Angular Python DynamoDB: about 5x longer. Why the gap? One stack is one language, one runtime, and a clear data model. The other is two ecosystems, two languages, and design decisions that need to be made up front. Choose your tech stack wisely.
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Marcus Hellberg retweeted
Vaadin@vaadin
Apr 8
Vaadin 25.1 brings reactive state management to Java—define your state once, and your UI stays in sync automatically. #Java #FullStack #WebDev #ReactiveProgramming
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Vaadin 25.1 is out. Despite it's minor version bump, it comes loaded with some big features 🤩 Want to learn more and ask the team questions? Join our live stream in 15 minutes: youtube.com/watch?v=7gVOjbai…

Vaadin 25.1 Release Livestream

Join us live to celebrate the Vaadin 25.1 release. Packed with prac...

youtube.com
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Cool side-benefit of using signals for state management in Vaadin: state is persisted across code hot swaps 🤩 (even scroll position is preserved!)
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Vaadin 25.1 is out! 🥳 Signals for reactive UI state management is the biggest update to our Java API since Vaadin 10 (but this time without breaking changes)! Other goodies: 🧑‍✈️ Copilot is free 🧪 Browserless UI testing is now free 🤖 New AI chat components vaadin.com/blog/vaadin-25-1-…

Vaadin 25.1: Free Copilot and production-ready Signals | Vaadin

Vaadin 25.1 makes Copilot free, brings production-ready Signals, open-sources browserless UI testing, and adds new components and AI integration APIs.

vaadin.com
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Ready for @Jfokus 2026, let’s goo!
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Getting ready for our long Viking boat trip to @Jfokus with a proper Viking feast with the @vaadin gang, @starbuxman, @gAmUssA and @jbaruch 🥳
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Last year was still busy with talks 💪 This year will be fewer talks as I'm focusing more on my new VP of Products role. But I'll still try to speak at a few key events a year 🤞
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Marcus Hellberg retweeted
Joonas Lehtinen@joonaslehtinen
Jan 11
Many know that in its early days @vaadin was called Millstone. Did you know that for a split-second, it was called Enably?
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Marcus Hellberg retweeted
Vaadin@vaadin
18 Dec 2025
Vaadin 25.0 has landed! 🛬 ✨ New "Aura" theme & native CSS styling ☕ #Java 21 Spring Boot 4 support 🚀 50% faster dev-mode startup 📦 Production-ready builds by default 📉 30% fewer dependencies Check it out: vaadin.com/blog/vaadin-25-0-…

Vaadin 25.0: simplified styling, leaner frontend, and key updates | Vaadin

Explore what’s new in Vaadin 25.0: simplified styling, a leaner frontend, smoother production builds, and practical updates for daily development.

vaadin.com
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Some nice CSS simplifications in Vaadin 25: CSS is just CSS now, no need for any Vaadin specific theme config. New Aura theme. Automatic light/dark color scheme support.
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Marcus Hellberg retweeted
Vaadin@vaadin
10 Dec 2025
Want to add a filter to a @vaadin Grid – in Java only? Drew shared a nice example showing how simple it can be. 🔗 Code: github.com/drewharvey/vaadin… Great for dashboards & CRUD apps. #Vaadin #Java #WebDev
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Marcus Hellberg retweeted
JCON
@jcon_conference
1 Dec 2025
Today's #JCON Content Board Spotlight: @marcushellberg (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 is fully committed. Join #JCON2026 at 2026.europe.jcon.one/
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Marcus Hellberg retweeted
LangChain4j@langchain4j
26 Nov 2025
#LangChain4j 1.9.0 is out! 🎉 github.com/langchain4j/langc…

Release 1.9.0 and 1.9.0-beta16 · langchain4j/langchain4j

Notable Changes Agentic: Introduce a generic agentic planner and reimplement all agentic patterns through it by @mariofusco in #3929 MCP: WebSocket transport support by @jmartisk in #4032 Gemini: ...

github.com
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Marcus Hellberg retweeted
Jfokus
@Jfokus
25 Nov 2025
🟦 Full-stack Web Apps, 100% Java with @marcushellberg (Vaadin). One language. One stack. As Odin intended ⚡ 👉 jfokus.se/ #Jfokus #DeveloperConference #Java #Vaadin #SpringBoot #Fullstack #WebDevelopment
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Marcus Hellberg retweeted
Dan Vega
@therealdanvega
21 Nov 2025
Spring Boot 4 is now available 🎉🤩 spring.io/blog/2025/11/20/sp…

Spring Boot 4.0.0 available now

Level up your Java code and explore what Spring can do for you.

spring.io
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Excited to speak at @Jfokus in February. Really love my Norse god avatar, I think it really highlights my luscious locks of hair 😂 jfokus.se/speakers.html?show…
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Simon Martinelli
@simas_ch
14 Nov 2025
As requested, I will do a live demo on how I use the AI Unified Process aiup.dev Join my live stream next week on Tuesday, November 18th, at 4 pm CET. Prepare your questions! youtube.com/watch?v=jwPBHVNv…

AI Unified Process (AIUP): Spec-Driven Development with AI

A spec-driven development methodology that keeps requirements at the center while AI generates code, tests, and documentation around them.

unifiedprocess.ai
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Marcus Hellberg retweeted
Jacky Chan@linux_china
19 Nov 2025
IntelliJ IDEA Qoder Vaadin Vaadin MCP Server: just a simple prompt to generate code for account and login support for entire app.
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