Reactive Programming

We're planning the next Hackergarten Zurich 🥳 We're looking forward to see some familiar faces and share knowledge within the open-source community. Spread the word — everyone is welcome! Bring your project, a bug, a feature, a question... or just your time and enthusiasm 💜 As always there will be free drinks, beer and pizza, sponsored by Quatico. As usual we briefly present the open-source projects we'd like to work on, break up into groups and try to make an actual contribution. We offer free pizza, beverages and depending on weather conditions a great view on Zurich West from the rooftop terrace. Many thanks to Quatico (https://www.quatico.com) for hosting the event!

Accessibility often feels overwhelming with all its guidelines, standards and edge cases. But in practice, meaningful improvements don’t require perfection. They require empathy and a sincere motivation to create a truly usable experience for all. In this talk, we share real learnings from UX and UI projects: what actually made a difference, where teams struggled, and how small, deliberate changes created a much more inclusive experience. You’ll walk away with a practical mindset and actionable ideas to start improving accessibility in your own projects — without waiting for the “perfect” solution. By Maria Timonen & Silio Keiser from Bitforge

The OWASP community is getting together for another meetup in May 2026! Join us for some security talks 🔐, good company 🤝, and a little aperitif 🍕. **Program:** **16:00** - **Doors open**: Grab a drink, meet old and new friends from the OWASP Switzerland community **16:30** - **Hello from OWASP Switzerland** **16:40 - Talk: Securing Your Code & Environment in the Age of AI-Accelerated Threats (Markus Rollwagen, Senior Solutions Architect, AWS)** **17:25** **-** **(10min break)** **17:35 - Talk: Using HoneyPots to protect critical Infrastructure (Giulio Grazzi, Head IT Security, SRF)** **18:35** - **(10min break)** **18:45 - Talk: We Tried to Detect Prompt Injection in Coding Agents. Here's What Broke (Paulo Martins, Principal Security Engineer, GitLab)** **19:30 - Networking & Pizza 🍕 & Aperitif**🍷- Grab a bite and chat with old and new friends **Talks Details:** **Securing Your Code & Environment in the Age of AI-Accelerated Threats (Markus):** AI keeps shortening the mean time from vulnerability disclosure to exploitation. This talk will discuss a playbook security teams can apply today — covering the CSA "Mythos-Ready" framework, AWS Security Agent, agentic threat modeling, and the fundamentals that continue to work **Using HoneyPots to protect critical Infrastructure (Giulio):** How do you protect your critical infrastructure in the days of agentic ai and very limited options on your hosts? You need to get creative and use stone age tech. I’ll give you some insights, from our journey and pitfalls you might be facing (and should be avoided :)) **We Tried to Detect Prompt Injection in Coding Agents. Here's What Broke (Paulo):** As a community, we are delegating a significant part of our development workflow to agents, and as the use cases grow, the risk of prompt injection keeps increasing - to the point that it made it to the top of the OWASP LLM Top 10. In this talk, I'll explore the concept of "detect and prevent prompt injection" and why it is particularly hard to do for coding agents. **Speaker Details:** **Markus Rollwagen** Senior Solutions Architect at AWS, based in Switzerland Markus enjoys deep dive technical discussions, while keeping an eye on the big picture and the customer goals. With a software engineering background, he embraces infrastructure as code and is passionate about all things security. **Giulio Grazzi** Head IT Security, SRF From bike messaging to networking to infosec - always maximize never max out. Currently at Schweizer Radio und Fernsehen dealing with all Infosec topics, background in networking, embedded devices and mobile security. **Paulo Martin** Principal Security Engineer, GitLab since 2021 Now focused on AI security: prompt injection, sandboxing, and keeping agentic workflows from doing things they shouldn't.

https://www.komoot.com/de-de/collection/2875816/-pizza-gravel-zurich Pizza Gravel Zurich plans social rides on mixed surface around Zurich. Enjoy a nice ride and pizza afterwards. Please check the Komoot Pizza Gravel Zuruch collection for the upcoming tour.

# 🚀 Lean Change Agent Zertifikatstraining: Weg von Masterplänen, hin zu echter Wirkung (Zürich) **Veränderung in Organisationen scheitert oft an starren Plänen und fehlendem Dialog.** In einer komplexen Welt brauchen wir keine dickeren Konzepte, sondern schnellere Experimente und echtes Stakeholder-Engagement. Dieses Training ist kein theoretischer Frontalunterricht. Wir arbeiten zwei Tage lang intensiv an **Praxisfällen**, damit du am Montag darauf sofort wirksam wirst. ### 🛠 Das Problem & Unser Ansatz Klassisches Change Management ist oft zu langsam und ressourcenintensiv. Wir nutzen das Lean Change Denkmodell, um Widerstände in wertvolle Energie zu verwandeln und Veränderungen kleinschrittig, zeitnah und messbar voranzutreiben. ### 🗓 Der Ablauf: 2 Tage interaktive Werkstatt * **Input-Sequenzen:** Kompakte, fundierte Impulse zu agilen Change-Methoden und Emotionaler Intelligenz. * **Experimente:** Du wendest die Theorie direkt auf deinen mitgebrachten Fall an. * **Plenum & Diskussion:** Wir reflektieren die Ergebnisse hochinteraktiv und ziehen handfeste Learnings für deinen Alltag. ### 💎 Dein Paket: Was du erhältst * **Anerkanntes Zertifikat:** Offizielle «Lean Change Agent» Zertifizierung. * **LCM Backpack:** Zugang zum globalen Ressourcen-Hub von Lean Change Management. * **Toolbox:** Alle Trainingsunterlagen und kuratierte Literatur für die nachhaltige Verankerung. * **Full Catering:** Verpflegung über beide Tage hinweg. ### 📊 Fakten, die für sich sprechen * **Erfahrung:** Über 800 erfolgreich begleitete Teilnehmende in mehr als 70 Events seit 2018. * **Spitzenqualität:** Ein NPS von 9.2 bürgt für höchste Relevanz. * **Exklusivität:** Geleitet vom ersten und aktuell einzigen akkreditierten Lean Change Trainer der Schweiz. ### 📍 Die Koordinaten * **Datum:** Donnerstag, 28.05. – Freitag, 29.05.2026 * **Zeit:** Start um 09:00 Uhr - 17:00 Uhr * **Ort:** On-Site, Raum Zürich (genaue Location folgt) * **Sprache:** Deutsch **Bist du bereit, die Organisationsbegleitung neu zu definieren?**

**Pizza, Pasta & UX: Join us for the Post-Meetup Dinner!** 🍕 Want to keep the conversation going after the UX meetup? Join us for dinner right after! We have reserved a table at our favorite local Italian restaurant. They have welcomed us many times with delicious food and a cozy atmosphere. It’s the perfect place to unwind and discuss the evening's topics over some tasty pizza or pasta. **Important:** Please register here to save your seat. This reservation is exclusive to attendees of the main meetup of the same day. See you there! The LTT Team

Important note: please sign up on the Google Developer Group platform to attend the meetup: https://gdg.community.dev/events/details/google-gdg-cloud-zurich-presents-gdg-cloud-zurich-build-with-ai-1/ Join the GDG Cloud Zürich to learn AI skills during ​a practical workshop alongside your local developer community. ​Use Google's integrated AI stack to solve real-world challenges, following a practical path from your first click to a fully deployed application. ​Peer-to-Peer Guidance by the Google Developer Organizers and local leads who share their honest experience building in the AI ecosystem. Google Developer Groups (GDGs) bring together local developers and technologists, from beginner to advanced, to connect, learn, and grow with Google's technologies and experts. This workshop is intended for developers, architects, and engineers interested in Google Cloud technologies. Agenda ⏰ 17:00: Doors open - please arrive on time ⏰ 17:15: Workshop starts (late entry may not be possible due to time constraints) ⏰ 18:45: Workshop ends. Participants join the tech talks. ⏰ 19:00: Welcome - Erin, Alessandro (organizers) ⏰ 19:05: Talk 1 – From DevOps to AI-Driven Software Delivery: The Sanitas journey – Norwin & Patrick, Sanitas ⏰ 19:30: Talk 2 – Directly from Vegas, the SRE extension, baked in Zürich, is live! – Ricc & Ramón, Google ⏰ 20:05: Networking & Apéro – Supported by Google Cloud, Zencore, ABB, and Datwave Workshop details Track 1 Title: Design-to-Code with Antigravity and Stitch MCPDescription: Build a production-ready website by bridging AI-driven design with an agent-first development environment. You will use Google Stitch to generate a high-fidelity UI, then connect it to the Antigravity IDE via the Model Context Protocol (MCP). Finally, you will use an autonomous agent to fetch the "Design DNA" and implement a pixel-perfect React application. Track 2 Title: Build a Multimodal AI Agent with Graph RAG, ADK & Memory BankDescription: Build an intelligent disaster response system by combining a graph database with multimodal AI and multi-agent orchestration. You will use Cloud Spanner Graph and Gemini embeddings to build a Survivor Network Database with hybrid search, then visualize the complex relationships using a React and Three.js frontend. Finally, you will use the Agent Development Kit (ADK) to coordinate specialized workflows and integrate the Vertex AI Memory Bank to enable long-term, personalized interactions.

✨🎟️ [Ticket required !! CLICK HERE](https://atelier-yuniku.as.me/nerikomi-bowl) 🎟️✨ **MATCHA OR CEREAL NERIKOMI BOWL: Pottery Workshop** Pottery Workshop with Tereza (in English) at atelier yuniku 2 hours / CHF 60.00 Join us for a **calm session** where you’ll create your own **ceramic bowl** using the **nerikomi technique**. Whether you prefer a **matcha** or a bowl for your morning **cereal**, you’ll shape a piece that fits your style. You’ll begin by choosing your clay colors - earthy tones that are layered and combined to form soft, marbled patterns. Using the nerikomi technique, you’ll mix the clay to create natural color flows, then shape your bowl by hand using a pinching technique. To finish, you’ll gently carve and scrape the surface, revealing the patterns hidden within the clay. The result is a one-of-a-kind bowl with a raw, organic look. After the workshop, we’ll glaze and fire your piece for you. **Good to know:** * Course in English * Beginner-friendly – no prior experience needed * Choice of 2–3 clay colors * All materials provided * Small apéro with wine included * Bowl ready for pickup in approx. 4 weeks * One bowl included; extra bowls can be made for a materials fee **Check out more of our courses: [https://www.atelier-yuniku.ch/en/courses](https://www.atelier-yuniku.ch/en/courses)** ℹ️ Please note: * Tickets are non-refundable * Photos and videos may be taken during the event for communication and promotion purposes. Please let the host know if you do not want to be included.

Web Zurich presents inspiring talks all about the web. Join us for the Mai 2026 meetup! We will have three talks as well as chit-chat and drinks. Whatapp: [https://chat.whatsapp.com/FxOfVTK9nf431xHtVl3eGK](https://chat.whatsapp.com/FxOfVTK9nf431xHtVl3eGK) Website: [https://webzurich.ch](https://webzurich.ch) 18:30 \~ 19:00 Arrival time with drinks, chat 19:00 \~ 19:10 Welcome and introduction 19:10 \~ 19:30 *Alex Suzuki* **Monetizing JavaScript: Building Profitable Products as a Solo Developer** Lessons learned from building and launching a commercial JavaScript library as a solo developer. 19:30 \~ 19:50 *Hugo Sousa* **Ten times tea** I'm building a programming language. When I got to the frontend, I ran into a problem: React's mental model is elegant, but the mental model is at odds with the code. Hooks, effects, and render passes create a runtime that bears little resemblance to the code we write. The Elm programming language works differently and its architecture (TEA = The Elm Architecture) has been adopted by other tools over the years. So I copied it as well. My language embeds TEA at the language level, not as a library. This unlocks time-travel debugging, reproducible application state and serializable bug reports that include the entire program state. This talk covers the quick introduction of my language, TEA, why TEA is the right fit and what becomes possible when the architecture is baked into the language itself. 19:50 \~ 20:10 *Marco Gähler* **Software testing** Many old software projects don't have any tests - if the code works, why should you bother with tests? Well, you really should bother, because code changes all the time. During development, you keep adding new features which at times requires large scale modifications of the code that will inevitably alter existing functionality. And in existing projects, one still has to make updates once in a while, for example for security patches. These things will always break existing functionality and tests are the only remedy against this issue. In this talk, we will look at the basic idea of tests, how to implement them, what issues to look out for and how you can test pretty much any piece of code if your code base is well structured. 20:10 onward More drinks & chat We look forward to see you there! Location https://zurich.impacthub.ch/space/bogen_d/ Viaduktstrasse 93, 8005 Zürich, Switzerland Visit our website https://webzurich.ch/ for more information about the Web Zurich community. This event is supported by Impact Hub Zürich, The global community of entrepreneurial people prototyping the future of business. At Impact Hub, you can connect, collaborate, co-work and create great content in an inspiring environment.

## 📸 PHOTO WALK: [Zurich Framed] **Framing is the art of using elements within a scene—archways, foliage, or window panes—to create a "frame within a frame." It draws the eye to your subject and adds depth to the composition.** Expect a sleek, industrial-chic vibe where the soaring concrete of the Viadukt arches meets the iconic stacked shipping containers of the Freitag Tower. Walk, shoot, and connect with photographers & creators as we move from **Zurich West** into the hidden creative corners of **District 5.** Beginners, enthusiasts, and pros — all are welcome. –––––––––– **EVENT DETAILS** **Location:** Zurich West → Im Viadukt → Frau Gerolds Garten **Date:** 30.05.2026 **Time:** 17:00 – 19:30 **Meeting Point:** **[MAME Josef (Josefstrasse 160).](https://maps.app.goo.gl/FvsNaYsBxLUo9GAF6)**[ ](https://maps.app.goo.gl/FvsNaYsBxLUo9GAF6)We'll meet just outside the entrance before heading toward the Viadukt arches. –––––––––– **EVENT FLOW** **17:00** \| Meet & Connect We’ll gather at MAME, grab a quick espresso, and introduce ourselves. **17:15** \| Main Walk Exploring the geometric lines of the railway viaduct, the urban textures of Geroldstrasse, and the vertical perspectives of the Freitag Tower. **19:30** → Optional dinner or drinks nearby at Frau Gerolds Garten or the Bogen F area. –––––––––– **IMPORTANT** This isn’t a class. It’s not a tour. It’s a creative meetup. We’ll walk. We’ll shoot. We’ll connect. –––––––––– **WHAT TO EXPECT** Bring your: • Film camera • Digital camera • Smartphone • Curiosity Whether you're a beginner, seasoned photographer, content creator, or just creatively curious — you’re welcome here. Come solo or bring friends. Spots are limited — reserve your place ASAP. –––––––––– **STAY CONNECTED** 📍 Join our [WhatsApp group](https://chat.whatsapp.com/DpjC2GofafSGuWcVnGB4Sz?mode=gi_t) for live location & updates. 📸 Follow [@takeaphotowalkcommunity](https://www.instagram.com/takeaphotowalkcommunity) and tag us in your photos. –––––––––– **ABOUT TAKE A PHOTO WALK** Founded in Barcelona in July 2024, Take a Photo Walk connects photographers and creators around the world through real-life creative experiences. Now **Zurich** is part of the story. –––––––––– Capture the precision of the stone and the fluidity of the lake. See you in **Zurich**. 📸

Welcome to the Competitive Play Session. This session takes place every Saturday from 10:45 to 12:15 at the Yonex Badminton Hall Hardbrücke. The number of players on the waitlist one week in advance determines the number of courts booked. If you are on the waitlist but can no longer attend, please remove yourself as early as possible. Players are accepted into the session based on skill suitability. This session is for experienced players looking for quality games. Play is focused on doubles with a competitive mindset and consistent rallies. You should be comfortable smashing, return smashes and keeping up a moderate tempo throughout the session. New players and those who are new to badminton are welcome to join the PM Session (Open Level Play). Payment can be made via TWINT after the session.

Welcome to the Open Level Play Session. This session takes place every Saturday from 12:15 to 13:45 at the Yonex Badminton Hall Hardbrücke. The number of players on the waitlist one week in advance determines the number of courts booked. If you are on the waitlist but can no longer attend, please remove yourself as early as possible. Open to players of all skill levels. This session is for doubles with a relaxed and social focus. Ideal for casual play, improvement and meeting new players. Payment can be made via TWINT after the session.

Welcome to the Open Level Play Session. This session takes place every Saturday from 10:45 to 12:15 at the Yonex Badminton Hall Hardbrücke. The number of players on the waitlist one week in advance determines the number of courts booked. If you are on the waitlist but can no longer attend, please remove yourself as early as possible. Open to players of all skill levels. This session is for doubles with a relaxed and social focus. Ideal for casual play, improvement and meeting new players. Payment can be made via TWINT after the session.

We keep it a fun and practical language exchange. First thing you'll notice is we match you with **fluent speakers** in your target language. **Event Flow** **18:45–19:15** → Registration Scan the QR code to tell us your fluent and target languages. **19:15–20:30** → Language Exchange Powered by our **Learn by Flipping** method. **20:30 onwards** → Stay, chat, or head off — totally up to you 😉 **What is "Learn by Flipping"?** **Practical** → You speak with fluent speakers in your target language. **Collaborative** → Every 5 minutes, you switch roles: learner ↔ helper. **Fun** → Small groups, good energy, and a bar atmosphere — without the chaos. Save some time by [Signing up to our web app](https://fliplingoes.com/) beforehand. **Entrance:** 10 CHF (includes a tapa) Please note, event registration closes after 7:15PM

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** https://youtube.com/live/BltmWMH1zG0?feature=share

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Here is the secret of being positive and free: Thinking positively is not enough. You also have to get rid of the negative thinking. Your mind is like a garden. You can plant many beautiful flowers in it, but if you don't get rid of the weeds when you plant your flowers, the weeds will soon take over the whole garden. A positive thought is like a flower in your mental garden, and a negative thought is like a weed. You cannot expect to have a positive mindset if you continue to have negative thoughts dwelling and growing there. So, how do you get rid of the negative thoughts? That's what this Meetup is all about. Attend this local meeting and find out! The Meetup event will be led by a consultant who had helped many people live happier in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This group is created by the Dianetics & Scientology life improvement center.

**Latest Dojo Location!** **Knotty Pine Brewing** 1765 W 3rd Ave, Columbus, OH 43212 We're going to try a new dojo location for a few weeks and see how it works Dojos are informal Python group study sessions where everyone interested in Python gathers to learn about Python, help others with Python, or just hang out. Everyone is welcome from Python beginners to experts. Bringing a laptop is encouraged (we'll have extension cords and power strips). If there's something you want to learn leave a comment on this invite so we can plan ahead. We're looking for speakers for our Monthly Meetups! Fill out the form if you are interested in presenting to the Python Community. https://forms.gle/ehSfUAC2WgR34Crq9

**TBA**

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

PLEASE NOTE!!! This event will be In-Person for our very 1st Improving collab! If you know the [Columbus Unity group](https://www.meetup.com/columbus-unity-user-group/) location, we'll be at the same place. This is our 1st event and are doing a soft launch with limited attendance. 1st come 1st serve. If you want to be there and we fill up, please email me at [info@thecogg.com](mailto:info@thecogg.com) and I'll be in touch. All street parking is free on Sundays but you can also pay to park in any of the local garages. See image of [parking map here](https://drive.google.com/file/d/1Mr9_LFIggbs-0_Zd3AJTGNqEhgMf2TzQ/view?usp=sharing). \-\-\- On the last Sunday of the month, we're having our usual end-of-the-month social gathering with our GameDev Meetup meeting. There will be announcements and presentations followed by some social networking Let's continue the conversations with good vibes and friends. All are welcomed from all ages and backgrounds to this public event. If we can, we'll be streaming or uploading the video later via our COGG YouTube channel here: [https://www.youtube.com/@TheCOGG/streams](https://www.youtube.com/@TheCOGG/streams) (Also please do subscribe if you have not done so!) No game development experience required! If you are interested in doing a 20 minute game development related presentation, please fill out our form online here: [https://goo.gl/forms/lVdTJZiNJewlPJuj1](https://goo.gl/forms/lVdTJZiNJewlPJuj1) Or e-mail us at info@thecogg.com with the following: Your Name, Company/Affiliation, Name of Your Game/Topic, Description, Tech Needs, and Your Contact. Be sure to check out our Discord for real time news updates: [https://discord.gg/NrBhuNQ](https://discord.gg/NrBhuNQ)