Marcus Hellberg

Oh wow, what an honor 🤩 The Java community is amazing

Ready for @Jfokus 2026, let’s goo!

Getting ready for our long Viking boat trip to @Jfokus with a proper Viking feast with the @vaadin gang, @starbuxman, @gAmUssA and @jbaruch 🥳

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 🤞

Many know that in its early days @vaadin was called Millstone. Did you know that for a split-second, it was called Enably?

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…

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.

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/vaa… Great for dashboards & CRUD apps. #Vaadin #Java #WebDev

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

#LangChain4j 1.9.0 is out! 🎉 github.com/langchain4j/la…

🟦 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

Spring Boot 4 is now available 🎉🤩 spring.io/blog/2025/11/2…

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?…

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=jwPBHV…

IntelliJ IDEA + Qoder + Vaadin + Vaadin MCP Server: just a simple prompt to generate code for account and login support for entire app.

Spring Framework 7 is GA! spring.io/blog/2025/11/1…

@JamesWard @spencerbgibb @SpringAICentral Thanks!

@marcushellberg @spencerbgibb @SpringAICentral This is close to the simplest thing that could possibly work: github.com/jamesward/hell…

Does anyone have a functioning example with @SpringAICentral and an HTTP MCP server? I've been going round in circles for an hour reading docs and examples, but still can't get it working 🤔

I created a new Vaadin AI starter that gives you a great starting point for building AI-powered apps. It includes: 💬 Streaming chat interface with Open AI 🔧 MCP support ☕ Java tool calling, local and REST → github.com/marcushellberg…

🚀 Spring AI 1.1.0 GA Released 🔧 Better MCP Integration ... 🔐MCP OAuth2 server protection 🔄 Recursive Advisors ...📦 Developer Experience: ... Over 850+ commits Kudos to the entire Spring AI community! 🙌 Find more: spring.io/blog/2025/11/1…

@sjivan @simas_ch I find AI coding agents do a great job building Vaadin UIs as long as you have the MCP enabled to give them access to up-to-date docs. The type safety of Java really helps them catch and fix errors on their own.

@simas_ch Java 25 is the latest LTS release. I also think we need to factor AI coding readiness in today’s stack and most AI coding agents and tooling do great with React / Tailwind with UI visual editors so not sure about Vaadin.

I'd like to introduce you to: the Simon Martinelli stack. martinelli.ch/the-simon-mart…