UI Design

Agenda: 18:00 Doors open 18:20 welcome, doors closing.. 18:30 From Reactive Streams, through Virtual Threads, to Flows - Adam Warski 19:30 break 20:00 Armeria: The Microservices Framework You Haven't Tried Yet - Dominik Dorn 21:00 networking **From Reactive Streams, through Virtual Threads, to Flows** Since Java's inception, the programming model has shifted from synchronous to asynchronous, and for good reasons: improved performance, higher throughput, and lower latency. Reactive Streams greatly simplified the development of reactive systems by incorporating elements of functional programming. However, with the introduction of Virtual Threads in Java 21, Java shifts back towards a purely synchronous model, while retaining high performance. Does this render initiatives like Reactive Streams obsolete? Can we combine the benefits of Reactive Streams with the approachability of Virtual Threads, the elasticity of modern Java, and the guarantees of functional programming? And what are the tradeoffs? **About Adam Warski** Adam Warski is the co-founder of SoftwareMill and head of R&D at VirtusLab, where he primarily generates code using Java, Scala, Rust and other interesting technologies. He is actively involved in open-source projects, such as Ox, Jox, Tapir, sttp, and others. He has also been a speaker at major conferences, including JavaOne, Devoxx, GeeCON and ScalaDays. In addition to writing closed- and open-source software, he spends his free time exploring various programming-related subjects. Any ideas or insights he gains usually end up on his blog ([https://warski.org/articles](https://warski.org/articles)). **Armeria: The Microservices Framework You Haven't Tried Yet** "One port to rule them all" .. that's the promise of Armeria, the microservice framework created by the creator of Netty, Trustin Lee. Armeria has built-in support for gRPC and Thrift, automatic endpoint descriptions (OpenAPI) and works with your Spring Boot App, your legacy Tomcat project or your dropwizzard app. We'll take a look at these (and more) features in this talk. **About Dominik Dorn** Dominik Dorn is a senior software engineer in Vienna and has been running the Java Vienna Meetup since \~2009. He has extensive knowledge in the Java and Scala ecosystems. He sometimes "tweets" on [https://x.com/domdorn](https://x.com/domdorn) . You can also find him on [Linkedin](https://www.linkedin.com/in/dominik-dorn/) where he happily accepts new connections from the community. He is doing freelance software consulting, so if your company needs help, he might have some resources left for helping you.

***5vs5 Montagskickerl @ Engelmann Soccer* ⚽️** Lust auf **Fußball**? Wir spielen regelmäßig ein lockeres **5vs5 @ Engelmann Soccer** im 17. Bezirk (**20:30-22:00**) - unkompliziert, ohne Team und ohne Verpflichtung. **Die Plätze sind limitiert,** daher gilt: first come, first served. So nimmst du teil: ✅ App downloaden ([www.strangersoccer.com](http://www.strangersoccer.com/)) ✅ Spiel auswählen ✅ Slot buchen, vorbeikommen & einfach mitkicken; wir kümmern uns um den Rest. 🎁 Dein **erstes Spiel kostenlos** ist mit dem Promocode WELCOME Mehr Infos direkt bei uns - schreib uns gerne! ☺️ \*\*\*\*\*\*\*\* ***5vs5 Monday Football @ Engelmann Soccer* ⚽️** Looking for **casual football**? We’re regularly playing a **relaxed 5vs5** @ **Engelmann Soccer** in Vienna’s 17th district (**8:30 PM – 10 PM**) - no team, no commitments, no stress. **Spots are limited**, so it’s first come, first served. How to join: ✅ Download the app ([www.strangersoccer.com](http://www.strangersoccer.com/)) ✅ Choose the game ✅ Book your slot, show up & play - we’ll take care of the rest. 🎁 Your **first game is free** with the promo code: WELCOME Feel free to message us if you’d like more info ☺️

Join me for a photo walk! :) To start off pride month, we will do a colour hunt. This means everyine gets assigned a colour that they will try to photograph during the walk :) We will gather at Burgtheater, than walk past Minoritenkirche, Cafe Central, Michaelerplatz and Zwidemu to MQ. There everyone is welcome to join me for a drink. The event is free of charge, and suitable for all ages and for any gear (phone is fine!) IMPORTANT: This photowalk is meant only for LGBTQIA+ people.

Get ready for an epic night of board games at the SpielBar! 🌟 We're hosting a monthly Meetup where you can dive into a world of fun, strategy, and laughter. From easy-going games for beginners to thrilling challenges for the pros, we have something for everyone. Don't worry about the rules; I'll be there to walk you through every step, ensuring a smooth and enjoyable experience for all. The SpielBar offers a fantastic selection of games, so you're in for a treat! RSVP now to secure your spot, and join us for an evening full of board games, and fun. 🎲🎉🏳️‍🌈 **How does it work?** We meet at 6:30 pm. Once we're gathered, we'll choose the games we want to play. If we're more than 6 people, we'll split up and play different games simultaneously. You can, of course, bring a board game with you and suggest it! We will finish the event by bringing everyone together again for a casual get-together.

Hello Viennovans! Pickwick's is getting quizzical every monday night! You have a chance to win a round of shots, a 40€ bar tab and/or eternal bragging rights 😉 Teams of up to 6 people, reserve your spot today! Start time is 7! FREE SHOT FOR EVERYONE COMING FROM VIENNOVA!

So hast du andere Leute in Wien wahrscheinlich noch nie kennengelernt! Bis zu 10 Singles, die sich zuvor nicht kennen, treffen sich in einer Bar und lernen sich bei einem eigens für diese Veranstaltungsreihe entwickelten Spiel näher kennen. Das Spiel kombiniert eine gelungene Mischung aus Fragen, Aktionsaufgaben und lustiger Unterhaltung, die alleine oder als Team gemeistert werden. Durch verschiedene Aufgaben und Fragen kommen die Spieler in direkte Interaktion miteinander und lernen sich im Spielverlauf näher kennen. Im Vergleich zur klassischen Single Party lernst du bei Socialmatch wirklich nur Singles in deiner Altersgruppe kennen und kommst von ganz alleine ins Gespräch mit den anderen Teilnehmern. Ein Spielmoderator vor Ort informiert über den Ablauf und leitet durch den Abend. Sicher dir jetzt deinen Platz beim nächsten Event unter [[www.socialmatch.de](http://www.socialmatch.de/)] und lerne neue Leute in deiner Stadt kennen. Dieses Event ist für die Altersgruppe 20 - 35 Jahre. P.S. Socialmatch erhielt 2015 bereits einen Award für das Konzept, teste es selbst ;-) **Achtung: Nur mit Buchung über die Website ist eine Teilnahme möglich!**

A Board Game Evening at Munchy The Urban Kitchen am Schottenring! Come, play, socialize, meet and enjoy! You can bring your own games or choose from the ones available. We have: * Jenga * Monopoly * Tabu * Uno and so on... We are excited to see you here! Enjoy your nice Monday evening! 🥳 [Follow us on Instagram](https://www.instagram.com/makingfriendsinvienna)❤️ [Follow us on Facebook](https://www.facebook.com/makingfriendsinvienna)💙 Do you have questions? Write us on Instagram 🎉

Are you interested in product management and user experience? Are you an early bird? Join us for **UX Vienna Mornings**, a casual breakfast meetup. Meet like-minded people, discuss interesting topics, and expand your professional network in a great atmosphere. Our agenda: 1. Introduce yourself: Share what you do or what you like. 2. Learn about job opportunities and upcoming events. 3. Discuss your topics or projects. Is there a question you would like to discuss? Or a project you would like to share? Please bring them along! 4. Network and chat. **UX Vienna Mornings** take place on the first Friday of every month from 8 am to 10 am. Please note that this location only accepts cash. By participating, you agree that your likeness may be recorded and authorise UX Vienna to use any recording containing your likeness in any medium for any purpose. Accessible services for people with special needs: For assistance from a public transport stop to the venue and back, please email Max Scheugl at m@nofro.com

**Does your LLM speak the same language as you?** *Context, Language & AI in Domain‑Driven Design* Zutaten allein reichen nicht. In Domain‑Driven Design (DDD) entscheiden Kontext, gemeinsame Sprache und Abgrenzung über gute Software – und über sinnvolle Nutzung von LLMs im Unternehmen. In diesem Meetup verbinden wir strategisches DDD, Ubiquitous Language und AI: * Warum Kontext wichtiger ist als Zutaten (erklärt am italienischen Dinner) * Warum gemeinsame Sprache kein Glossar, sondern ein Arbeitsinstrument ist * Wie viel Kontext ein LLM wirklich braucht – und warum unser Team denselben braucht Wir diskutieren LLMs nicht als Ersatz für Zusammenarbeit, sondern als **Verstärker von gutem Domain‑Wissen**. **Agenda** * Quick Intro: Kontext als roter Faden * Strategisches DDD: Zutaten ≠ Lösung * Ubiquitous Language: Sprache als Entscheidungsgrundlage * LLMs im Business: impliziter vs. expliziter Kontext * Diskussion & Q&A **Timeline** 🚪 17:00 Open doors 🎬 17:30 Official start 🍕 19:30 Pizza and Networking \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **English Version:** Does your LLM speak the same language as you? Context, Language & AI in Domain‑Driven Design Ingredients alone aren't enough. In Domain‑Driven Design (DDD), context, shared language, and clear boundaries determine good software – and the meaningful use of LLMs in an organization. In this meetup, we connect strategic DDD, Ubiquitous Language, and AI: Why context matters more than ingredients (explained through an Italian dinner) Why shared language isn't a glossary, but a working instrument How much context an LLM really needs – and why our team needs the same We discuss LLMs not as a replacement for collaboration, but as an amplifier of good domain knowledge. Agenda Quick Intro: Context as the common thread Strategic DDD: Ingredients ≠ Solution Ubiquitous Language: Language as a basis for decisions LLMs in Business: implicit vs. explicit context Discussion & Q&A \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 🎤 **Call for Speakers & Sponsors!** Wenn du selbst etwas beitragen möchtest oder eine Idee für einen Talk hast, melde dich gerne bei uns. Wir sind laufend auf der Suche – nicht nur nach Speaker:innen, sondern auch nach neuen Locations für zukünftige Meetups.

**Does your LLM speak the same language as you?** *Context, Language & AI in Domain‑Driven Design* Zutaten allein reichen nicht. In Domain‑Driven Design (DDD) entscheiden Kontext, gemeinsame Sprache und Abgrenzung über gute Software – und über sinnvolle Nutzung von LLMs im Unternehmen. In diesem Meetup verbinden wir strategisches DDD, Ubiquitous Language und AI: * Warum Kontext wichtiger ist als Zutaten (erklärt am italienischen Dinner) * Warum gemeinsame Sprache kein Glossar, sondern ein Arbeitsinstrument ist * Wie viel Kontext ein LLM wirklich braucht – und warum unser Team denselben braucht Wir diskutieren LLMs nicht als Ersatz für Zusammenarbeit, sondern als **Verstärker von gutem Domain‑Wissen**. **Agenda** * Quick Intro: Kontext als roter Faden * Strategisches DDD: Zutaten ≠ Lösung * Ubiquitous Language: Sprache als Entscheidungsgrundlage * LLMs im Business: impliziter vs. expliziter Kontext * Diskussion & Q&A **Timeline** 🚪 17:00 Open doors 🎬 17:30 Official start 🍕 19:30 Pizza and Networking \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **English Version:** Does your LLM speak the same language as you? Context, Language & AI in Domain‑Driven Design Ingredients alone aren't enough. In Domain‑Driven Design (DDD), context, shared language, and clear boundaries determine good software – and the meaningful use of LLMs in an organization. In this meetup, we connect strategic DDD, Ubiquitous Language, and AI: Why context matters more than ingredients (explained through an Italian dinner) Why shared language isn't a glossary, but a working instrument. How much context an LLM really needs – and why our team needs the same We discuss LLMs not as a replacement for collaboration, but as an amplifier of good domain knowledge. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Dieses Meetup ist eine Zusammenarbeit mit dem [DDD Vienna Meetup](https://www.meetup.com/ddd-vienna/events/314052752/?). Anmeldung auf einer von beiden Meetups ist ausreichend. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- 🎤 **Call for Speakers & Sponsors!** Wenn du selbst etwas beitragen möchtest oder eine Idee für einen Talk hast, melde dich gerne bei uns. Wir sind laufend auf der Suche – nicht nur nach Speaker:innen, sondern auch nach neuen Locations für zukünftige Meetups.

We are pleased to welcome Katrina Brock from Max Planck Society to present an R package for analyzing animal movement data. Join us to explore how R can be put to work in animal behaviour research. **Travel Paths: Bridging the usability gap in open source animal movement algorithms** The behavior ecology literature offers a rich library of approaches for finding patterns in animal movement data. While many of the biologists developing these algorithms publish their code, it is rarely optimized for reuse. Even well-designed packages with similar workflows have different interfaces that potential users need to learn one by one. By wrapping these algorithms in a standardized interface, the “Travel Paths” framework reduces researcher toil. Instead of digging through scripts and learning disparate conventions, they can run many methods with just a few functions. The framework is composed of two packages: the trackframe package provides a flexible and interoperable format for input data while the travelpaths package, taking inspiration from parsnip, offers the interface for movement models. In this talk, we’ll discuss how we designed this framework and how it can be leveraged to enable even novice R users to apply a variety of methods to their animal movement data.

**❗️ 👉 TO THE EVENT:** [Does your LLM speak the same language as you?](https://www.meetup.com/ddd-vienna/events/314052752/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=357085385)[ ](https://www.meetup.com/java-and-friends/events/313430813/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=357085385)**❗️** In cooperation with the [Domain-Driven Design Vienna](https://www.meetup.com/ddd-vienna/) Community we are hosting a meetup **at the SQUER Office Vienna.** **👉** Please register on the dedicated [Does your LLM speak the same language as you?](https://www.meetup.com/ddd-vienna/events/314052752/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=357085385) Page to join us on June 2nd at 5:00 PM 🥳 We are looking forward to seeing you there!

Agenda (preliminary) 18:00 doors open 18:20 welcome 18:30 **A Tour of Ox 1.0: Direct-Style Concurrency and Resiliency** 19:30 break 20:00 **Maybe(!): "Orca: Deterministic, AI-driven development flows"** 20:00 **Maybe(!): "Sandcat: Docker & dev container setup for securely running AI agents"** 21:00 Networking **A Tour of Ox 1.0: Direct-Style Concurrency and Resiliency** Ox provides a toolkit for safe concurrency and resiliency for Scala on the JVM. After two years of prototyping, we’re delighted to showcase the final product. With Ox, you can build and deliver direct-style Scala applications today. In the code-first presentation, we’ll begin with concurrency (including lower-level structured concurrency scopes and higher-level concurrency operators). Next, we’ll proceed to Ox’s approach to error management and type safety in that area. We’ll then explore Ox’s direct-but-reactive streaming library before concluding with its built-in resiliency toolkit. Software is never finished, so we’ll also share what lies ahead for Ox specifically and our plans for direct-style Scala generally. **About Adam Warski** Adam Warski is the co-founder of SoftwareMill and head of R&D at VirtusLab, where he primarily generates code using Java, Scala, Rust and other interesting technologies. He is actively involved in open-source projects, such as Ox, Jox, Tapir, sttp, and others. He has also been a speaker at major conferences, including JavaOne, Devoxx, GeeCON and ScalaDays. In addition to writing closed- and open-source software, he spends his free time exploring various programming-related subjects. Any ideas or insights he gains usually end up on his blog ([https://warski.org/articles](https://warski.org/articles)). **Maybe(!): "Orca: Deterministic, AI-driven development flows"** Orca Flow scripts orchestrate coding agents. No need to try to convince the LLM that reviewing code until all review comments are fixed is a good idea - the script will ensure that's the way it will be done. No need to spend tokens on calling a code formatter, switch branches or creating PRs. Orca Flow scripts are written in Scala, and executable using scala-cli. That's the only component you'll need to install - everything else will be downloaded on-the-fly. Orca Flow scripts read like Python, but are type-safe, so you can know that your script will execute just fine. Orca works with Claude & Codex (now), but the plans are much wider than that! **Maybe(1): "Sandcat: a Docker & dev container setup for securely running AI agents** Sandcat is a Docker & [dev container](https://containers.dev) setup for securely running AI agents. The environment is sandboxed, with controlled network access and transparent secret substitution. All of this is done while retaining the convenience of working in an IDE like VS Code. All container traffic is routed through a transparent [mitmproxy](https://mitmproxy.org/) via WireGuard, capturing HTTP/S, DNS, and all other TCP/UDP traffic without per-tool proxy configuration. A straightforward allow/deny list-based engine controls which network requests go through, and a secret substitution system injects credentials at the proxy level so the container never sees real values.

Dear artists, This time we will draw Iris again! See you there!

Join the local UX community for our casual monthly breakfast event. We're exploring the West Side this month with a member suggestion –those are always welcome. Thanks to the team at Nationwide for supporting the group!

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd

We meet to learn and practice American Sign Language and to grow our familiarity with Deaf culture. Facilitated by hearing folks (with a connection to a professional interpreter) using Deaf-created content. People of all ASL skill levels are welcome! As we learn, we hope to connect more with the Deaf community in Central Ohio. Join us as you're able! Come regularly or just once - whatever you're looking for! Each meetup will explore different topics related to ASL/Deaf culture, and will feature time to practice conversation with one another. Just bring yourself and a willingness to learn!

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

**TBA**

**The Behavior Gap: Where Products Win or Lose** Teams today have more data than ever, and yet many still struggle to understand why customers adopt, engage with, or abandon their products. Teams sprint, ship faster, and chase more signals… all while metrics stall and confidence drops. The missing piece isn’t more data. It’s often the behavioral insight between the metrics, explaining why the numbers move in the first place. Dashboards can tell you what customers did, but understanding why they did it (and how to influence what they do next) requires a deeper blend of insights. This session is about closing that gap. Drawing from real-world experience designing and scaling products as [ZoCo Design](https://zocodesign.com/)’s CEO, [Lacey](https://www.linkedin.com/in/laceypicazo/) will share how to cut through the noise and identify the insights that actually change behavior—moving people, and moving metrics. You’ll learn: * Why understanding customer behavior is a quant and qual challenge * How to spot the signals that actually predict behavior change * Where AI accelerates insight, and where it creates distraction * How to get meaningfully closer to customers, without adding more tools This talk reframes how to evaluate performance and identify what levers actually improve it, helping your team to make smarter bets with greater confidence. Every meaningful outcome is driven by behavior change. And when you know how to design for behavior, you stop guessing, and start building things that work. **About Our Speaker** [Lacey Picazo](https://www.linkedin.com/in/laceypicazo/) is the Founder and CEO of ZoCo, a healthcare product studio that turns complex, high-stakes ideas into products that drive real-world adoption. She partners with healthcare organizations to uncover critical care delivery insights, focus product strategy through behavior design, and build solutions that patients and providers actually use. Thanks to our 2026 sponsors: [Clarivoy](https://www.clarivoy.com), [What Box Consulting Group](https://www.whatboxconsultinggroup.com), [Conductrics](https://www.conductrics.com), and [Piwik PRO](https://piwik.pro) More info at [cbusdaw.com](https://cbusdaw.com)

**TBA**