~/talks

Marcus Hellberg

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Full-stack web apps, 100% JavaJfokus 20262026-02-02
Build a full-stack web app using only Java: Spring Boot + Vaadin Flow for UI, JPA with an in-memory database for persistence, and Spring AI (OpenAI) for LLM…
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Real-World AI Patterns with Spring AI and VaadinSpring I/O 20252025-05-22
Live demos show a Vaadin chat UI wired to Spring AI 1.00 and GPT41, with a message memory advisor that reattaches recent turns, token streaming via Reactor…
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Practical AI in JavaJCON EUROPE 20252025-05-12
Shows concrete Java patterns using Spring AI + Vaadin with Apache Tika for PDF/image parsing and PGVector for embeddings. Demonstrates streaming responses as a…
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Full-stack web apps, 100% JavaJCON EUROPE 20242024-05-13
Live code shows a full-stack app built entirely in Java using Vaadin Flow and Spring Boot, no JS/HTML/CSS, with JPA persistence and a generated dataset of 100…
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Building a custom AI chatbot with Spring Boot, React, and LangChain4jJCON EUROPE 20242024-05-13
Hands-on build of an airline customer-service chatbot that integrates Spring Boot, React, LangChain4j, Hilla with OpenAI (GPT‑4o) streaming, an embedding…
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Building a Custom AI Chatbot with Spring Boot, React, and LangChain4jAI.dev: Open Source GenAI & ML Summit North America 20232023-12-12
Builds a full stack RAG chatbot using Spring Boot backend, React + Hilla frontend, LangChain4j and OpenAI GPT-4, with a 500‑token windowed chat memory and a…
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Building AI Chatbot with Spring Boot, React and ChatGPT (Live Code)JCON WORLD ONLINE 20232023-11-20
Live code builds a Spring Boot + React app that calls ChatGPT via Lang chain for J and uses Hilla to wire front end and back end, creates vector embeddings…
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Building Full-Stack Web Apps Faster with Spring Boot, React, and HillaJCON Europe 20232023-06-20
Live code builds a full stack chat app using Spring Boot and Java on the backend and React with TypeScript on the frontend, wired by the Hilla framework that…
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Modern Web Apps, 100% Java: Building Web Apps With VaadinFOSDEM 20222022-02-05
If you're like most people, the words "Java web app" may conjure up memories of ancient Applets or make you think of multi-page apps built with JSPs or Spring…
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Java meets TypeScript: building a full-stack web app with Spring BootJCON-ONLINE 20212021-10-05
Live demo shows a Spring Boot backend plus a TypeScript LitElement frontend wired together with Vaadin Fusion and automatic Maven builds, generating TypeScript…
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Why the web makes sense for business appsPolymer Summit 20162016-10-17
Vaadin demonstrates concrete work: a library of Vaadin Elements (data grid, combo box, upload, datepicker) running in the browser, an NPM-installable universal…
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