Internet of Things (IOT)

Projekt Drasi ist ein noch ganz frisches Open Source Projekt von Microsoft, das den Gedanken des Complex Event Processings neu aufgreift. Dabei geht es im Kern darum, Datenveränderungen in Softwaresystemen zu erkennen und darauf entsprechend reagieren zu können. In neu zu entwickelnden Systemen würde man dies mit Event Sourcing oder technischen Lösungen "from Scratch" realisieren, aber was ist mit Bestandssystemen? Wie schafft man es dort, die auftretenden Veränderungen zu erfassen und vor allem, warum möchte man darauf reagieren? Ich möchte in diesem Talk zeigen, wie man mit Hilfe von Drasi, ein Monolith Legacy System in ein Micro Service System einbetten oder umwandeln kann.

Not every meaningful encounter needs a big event. Sometimes connection simply happens because you showed up. This Social Butterfly Club Meetup is a relaxed Monday gathering for people who prefer real conversations over endless scrolling. A space to talk, listen, exchange stories, and experience Berlin through human presence instead of algorithms. Whether you’re new in the city, rebuilding your social rhythm, or just enjoy meeting thoughtful people in an unforced setting — this evening is for you. ✨ Suggested Ice Breaker Question: “What’s something small you’ve discovered in Berlin recently?” Orga This meetup is donation based. Your contribution helps keep this community alive and is highly appreciated. You can either contribute in cash or via Buy me a Coffee: [https://buymeacoffee.com/butterflyradar](https://buymeacoffee.com/butterflyradar) Questions? Check our FAQs: [https://socialbutterfly.berlin/meetup-faq/](https://socialbutterfly.berlin/meetup-faq/) Meet your host I’m Julia — a Berlin local who loves bringing people together. My path went from growing up in a dance school to studying philosophy to working in IT support, and somehow all of that led me here: hosting meetups and creating spaces where people can show up, relax, and connect. Insta [https://www.instagram.com/juwaberlin/](https://www.instagram.com/juwaberlin/) LinkedIn [https://www.linkedin.com/in/julia-waehnert/](https://www.linkedin.com/in/julia-waehnert/) About The Social Butterfly Club is a Berlin-based community that has been bringing people together for over three years. Each gathering is part of a larger framework designed to help friendships grow through shared experiences in the city — with a long-term vision of turning Berlin itself into a shared, playful experience. Curious to learn more about the Social Butterfly Club? You can explore the bigger picture and stay connected here: [https://social-butterfly-berlin.kit.com/join](https://social-butterfly-berlin.kit.com/join) Join our Telegram Group: [https://t.me/+OnASVWZ7emhjYzEy](https://t.me/+OnASVWZ7emhjYzEy)

... english version below Liebe Datamonster und Freunde des gepflegten Datenstroms. Alles neu macht 2026... Und wir starten mit einem Knall ins neue Jahr: wir sind ab sofort in einer **neuen Location!** Unsere Freunde von b.telligent haben uns freundlicherweise die **Berlin Bytes** vermittelt, die uns ab sofort in ihrem Büro in der Backfabrik am Prenzlauer Berg willkommen heißen werden. Und zum ersten Termin in der neuen Location gehört natürlich auch ein herausragender Sprecher und den haben wir mit Janek Fellien gefunden. Sein Thema ist das Projekt Drasi Projekt Drasi ist ein noch ganz frisches Open Source Projekt von Microsoft, das den Gedanken des Complex Event Processings neu aufgreift. Dabei geht es im Kern darum, Datenveränderungen in Softwaresystemen zu erkennen und darauf entsprechend reagieren zu können. In neu zu entwickelnden Systemen würde man dies mit Event Sourcing oder technischen Lösungen "from Scratch" realisieren, aber was ist mit Bestandssystemen? Wie schafft man es dort, die auftretenden Veränderungen zu erfassen und vor allem, warum möchte man darauf reagieren? Ich möchte in diesem Talk zeigen, wie man mit Hilfe von Drasi, ein Monolith Legacy System in ein Micro Service System einbetten oder umwandeln kann. Online teilnehmen könnt ihr unter folgendem [Link](https://teams.microsoft.com/meet/34859473575613?p=dZmKkYBDnMGEltFDhK), wir empfehlen euch aber natürlich wärmstens, mit uns die neue Location für die Berliner Datamonster einzuweihen. Es freuen sich Markus & Ben \-\-\-\-\-\-\-\-\-\-\-\-\- english version \-\-\-\-\-\-\-\-\-\- Dear data monsters and friends of well-crafted data streams, Everything is new in 2026… and we’re starting the new year with a bang: from now on, we have a **new location**! Our friends at b.telligent have kindly connected us with **Berlin Bytes**, who will be welcoming us from now on at their office in the Backfabrik in Prenzlauer Berg. And of course, the first event at the new location calls for an outstanding speaker—and we’ve found one in Janek Fellien. His topic is the Drasi project. Project Drasi is a very new open-source project from Microsoft that revisits the idea of Complex Event Processing. At its core, it is about detecting data changes in software systems and being able to react to them accordingly. In newly developed systems, this would typically be implemented using event sourcing or technical solutions built “from scratch.” But what about existing systems? How can changes be captured there—and, more importantly, why would you want to react to them? In this talk, I want to demonstrate how Drasi can be used to embed or transform a monolithic legacy system into a microservices system. You can join online via the following [link](https://teams.microsoft.com/meet/34859473575613?p=dZmKkYBDnMGEltFDhK), but of course we warmly recommend that you celebrate the inauguration of the new location for the Berlin Data Monsters with us in person. Looking forward to it, Markus & Ben

[*Registration form required below*] **Interested in Japanese sword fighting or Japanese culture? Come join a trial and experience the traditional Samurai art at Katori Shintō-ryū in Schöneberg.** **Trial Fee**: **25€**/ session (2hr). Classes every Monday, Wednesday and Friday from 19:00 to 21:00. **!!SIGN UP HERE**: [Katori Shinto-ryū Berlin Sign-up (google.com)](https://docs.google.com/forms/d/e/1FAIpQLSeBt4A13VgnEcgQQ2PDaruthmYMRWineG4KtUCKsuC9KBsCUQ/viewform) Registration is required before your participation so that we can prepare enough training equipment. **Address**: Belziger Str. 25, 10823 Berlin. **No previous experience required!** The classes are in English and German. **Our website**: [Kenjutsu Berlin - Official school of Katori Shinto-ryu in Berlin (katoriberlin.org)](https://katoriberlin.org/) **Katori Shintō-ryū** is one of the oldest Japanese sword fighting traditions (koryū) still practised today and is recognized by the Japanese government as a cultural intangeable asset. The school was founded in the middle of the 15th century by Iizasa Chōisai Ienao at the Katori Shrine (Katori jingū) and has become the origin of numerous other martial arts schools over the course of its almost 600-year history. The training consists of the continuous repetition of fixed sequences of movements (kata) and includes the use of classic Japanese weapons such as the sword (iai-jutsu, battō-jutsu, ken-jutsu, ryōtō-jutsu, kodachi-jutsu), the long staff (bō-jutsu), the lance (naginata-jutsu) and the spear (sō-jutsu), as well as unarmed disciplines, tactics and spiritual aspects. **The Katori Berlin dojo** is the only official shibu of Otake Nobutoshi-shihan’s dojo Shinbukan in Germany and fully dedicated to the transmission and study of one martial tradition: Tenshinshō-den Katori Shintō-ryū. Through these efforts we aim to contribute to the cultural preservation of this martial tradition. The dojo has one officially appointed shidosha. **Our sensei**: Sebastian Graetz has been active in martial arts since 1997. After almost 15 years of taekwondo in Berlin, he started with Katori Shintō-ryū in Asia in 2014. Since then, he has studied in Japan with Ōtake Risuke-shihan and Ōtake Nobutoshi-shihan, and in Vietnam with Malte Stokhof-shihandai. In 2023, he received his Menkyo license and permission to set up a training group in Berlin the following year.

** Wertschätzungsbeitrag: 10-20 Euro (nach eigenen Möglichkeiten)** **Du möchtest Deine Freundschaften, Partnerschaft & Arbeitsbeziehungen verbessern? Dieser Worskhop kann ein großer Schritt dazu sein.** In diesem Einführungs-Workshop machen wir praktische Übungen aus der Gewaltfreien Kommunikation (GFK). Gewaltfreie Kommunikation ist eine der effektivsten Methoden zum Lösen von Konflikten, Aufbau von Vertrauen und wertschätzender Kommunikation auf Augenhöhe - in allen unseren Beziehungen. . . ** Um folgende Themen geht es an diesem Abend:** * Wie du offen und ehrlich sagen kannst, was in dir vorgeht – und trotzdem in Kontakt mit anderen bleibst * Wie du klar und konkret für deine Bedürfnisse einstehen kannst * Wie Konflikte zu mehr Verbindung führen können * Wie Empathie uns hilft, mit Wut, Schmerz, Angst und Verletzung umzugehen * und mehr ... . . **‍♂️ Zum Trainer: Lorenz Kaplick** Ich (Lorenz) bin Psychologe und zertifizierter Mediator. Seit 7 Jahren beschäftige ich mich intensiv mit den Themen Dialog, Beziehungen & Konfliktklärung. Ich habe mit Trainer:innen aus Europa und der Welt gelernt und zusammengearbeitet. Die GFK hat mein Leben grundlegend verändert. Sie hat mir eine Hoffnung für die Menschheit gegeben, die ich vorher nicht hatte. Deshalb freue ich mich, diese Art der Welt zu begegnen mit anderen zu teilen. Das mache ich durch meine Arbeit als Organisationsentwickler, Mediator – und durch Workshops wie diesen. Meine Website: [lorenz-kaplick.com](www.lorenz-kaplick.com) . . **⏰ Die Türen sind offen ab 18:15 Uhr. Komm am besten schon 18.15 Uhr:** Mantel aufhängen, Toilette, eine Runde schwatzen und los ... . . **❓ Darf ein zweites Mal kommen?** Ja, sehr gern. Ich halte es sogar für sinnvoll, mehrfach zu kommen, wenn Dir der Workshop gefällt: Das Thema vertiefen, die eigenen Beobachtungen aus den letzten Wochen verarbeiten und sich mit neuen & alten Bekannten über das Thema weiter austauschen. . . ** Der Veranstaltungsraum** * Wir haben einen wunderschönen Raum im Kieztreff in Berlin Mitte (mit sauberen Toiletten!). * nähe Hackescher Markt. Sehr gut mit den Öffis zu erreichen. * Wenn Du vor Ort ankommst, ist alles ausgeschildert. . ** Das bringst Du mit ...** * Etwas zu trinken (z.B. deine Wasserflasche, keinen Alkohol!) * Wenn Du magst: Zettel und Stift. * Du solltest satt sein und vorher gegessen haben * Bargeld für den Wertschätzungsbeitrag (10-20 Euro) . **Kann ich mich vorbereiten?** Nein, brauchst Du nicht. Der Workshop ist für Neulinge, die mal in die GFK schnuppern wollen, ebenso wie Menschen mit einer GFK-Ausbildung, die einen Raum zum üben und erfahren suchen. Wenn Du etwas zur GFK lesen willst, empfehle ich dieses Buch: * [Marshall B. Rosenberg: Gewaltfreie Kommunikation](https://amzn.to/4qSnp6L) (Werbung, Amazon) . *[Als Amazon-Partner verdiene ich an qualifizierten Verkäufen]* . **Mehr über Abenteuer Freundschaft:** Abenteuer Freundschaft forscht zum Thema Freundschaft. * Was ist gute Freundschaft eigentlich? * Wie wird man Freunde? * Wie gestaltet man eine gute Freundschaft über Jahrzehnte? . Mehr erfährst Du auf [www.abenteuer-freundschaft.de](www.abenteuer-freundschaft.de). . Auf Meetup findest Du Freundschafts-Workshops, Wanderungen, Spaziergänge, Männerabende, Frauen-Freundschafts-Workshops und Themenabende zur Vertiefung psychologischer Fragen. . Lorenz wird als sehr erfahrender Gast-Trainer diesen Abend gestalten. Ich (Georg) freue mich sehr darauf und nehme auch teil. \-\-\-\-\-\-\-\-\-\-\-\-\- ** Get in touch & stay in touch:** **✈ Telegram-Kanal: [t.me/abenteuer_freundschaft](http://t.me/abenteuer_freundschaft)** für Events, Workshops & Neuste Erkenntnisse aus der Freundschaftsforschung (Überschriften) **✉ Freundschafts-Newsletter:** [https://abenteuer-freundschaft.de/newsletter](https://abenteuer-freundschaft.de/newsletter) Alle 4 Wochen das Neuste aus der Freundschaftsforschung; oft seltener, denn ich schreibe nur, wenn es wirklich etwas zu berichten gibt. ** 6 Zutaten großartiger Freundschaften** Seit 2020 forsche ich (Georg), was großartige Freundschaften wirklich ausmacht. Ein Ergebnis ist das 30seitige eBook: "Die 6 Zutaten großartiger Freundschaften". Du erhältst das eBook zurzeit kostenlos, wenn Du Dich für den Newsletter anmeldest: [https://abenteuer-freundschaft.de/newsletter](https://abenteuer-freundschaft.de/newsletter) ** Diese Meet-Up-Gruppe:** [https://www.meetup.com/g/abenteuer-freundschaft/](https://www.meetup.com/g/abenteuer-freundschaft/) Hier bist Du schon: Workshops, Spaziergänge, Wanderungen, Treffen, Eislaufen, Eisbaden, Männer-Abende, Freundinnen-Workshops & Sonntagsausflüge

**Für Deutsch bitte unten lesen** **Where:** w3.hub, Möckernstrasse 120, 10963 Berlin 2\. OG\, area in the very back **Our events feature the following topics:** The following workshops are always for free and distributed on the following event dates. * 12.01.: What is Bitcoin all about? * 26.01.: Workshop: Send and receive Bitcoin * 09.02.: How to store your Bitcoin password (Seed) * 23.02.: Options to buy Bitcoin and what to watch out for * 09.03.: Workshop: Send Bitcoin in seconds (Lightning) * 23.03.: Workshop: Understand Bitcoin through play * 06.04.: Why only Bitcoin - not Crypto **Contact BBW:** * Telegram: https://t.me/+8nEA93930qowODky * Nostr: Bitcoin Beginner Workshops / npub1qtc6zmhaq6svkuny3r5h3n6wxel5cyzmwz7haygans36ee60l7vqgk2sxp **Deutsch:** Dieses Event wird in Englisch abgehalten. Für die deutschen Kurse gehe bitte auf unsere deutsche Eventreihe "[DE] Bitcoin Beginner Workshops - Entdecke Bitcoin": https://www.meetup.com/bitcoin-lab-berlin/events/ **Video** This event will not be recorded and will not be available online afterwards. **Privacy** Attending this event requires that the privacy of all individuals is respected. No recordings of any kind may be made or distributed if people are identifiable. This applies to the event itself, as well as the time before and after it.

**For English see below** **Treffpunkt:** w3.hub, Möckernstrasse 120, 10963 Berlin 2\. OG\, hinterer Bereich **Unsere Eventreihe hat die Themen:** Die folgenden Workshops sind immer kostenlos und auf die gesamte Eventreihe verteilt. Wir werden es dir auch ermöglichen, dass du zu jedem Zeitpunkt in die Eventreihe einfach einsteigen kannst. Die Eventreihe endet mit dem letzten Termin, aber sie wird danach sofort von vorn beginnen und wir werden das Datum der Events dann anpassen. * 12.01.: Was ist Bitcoin eigentlich? * 26.01.: Workshop: Bitcoin senden und empfangen * 09.02.: Workshop: Bitcoin/ Bitcoin Passwort (Seed) sicher aufbewahren * 23.02.: Wo man Bitcoin kaufen könnte und auf was man achten sollte * 09.03.: Workshop: Bitcoin in Sekunden versenden (Lightning) * 23.03.: Bitcoin vererben * 06.04.: Warum nur Bitcoin - nicht Crypto * 20.04.: Workshop: Bitcoin spielerisch verstehen **Kontakt zu BBW:** * Telegram: https://t.me/+8nEA93930qowODky * Nostr: Bitcoin Beginner Workshops / npub1qtc6zmhaq6svkuny3r5h3n6wxel5cyzmwz7haygans36ee60l7vqgk2sxp **Anmeldungen:** Diese sind nicht erforderlich. Sollte es zu voll werden, werden wir aber Personen mit einer Anmeldungsbestätigung Vorrang geben. Teilt uns in eurer Anmeldung lediglich die Anzahl der Personen mit - keine weiteren Infos erforderlich: * meetup.com * Email: bbw@bitcoinexplained.de * Telegram: https://t.me/+8nEA93930qowODky * oder mündliche Absprache mit den Organisatoren für Folgeevents **Video** Dieses Event wird nicht aufgezeichnet und auch nicht irgendwo danach online verfügbar sein. **English** This event here is in German. The event "[ENG] Bitcoin Beginner Workshops - Explore Bitcoin" is in English and can be found under this link: https://www.meetup.com/bitcoin-lab-berlin **Privatsphäre** Die Teilnahme bei diesem Event verpflichtet dazu, dass die Privatsphäre von allen Personen gewahrt wird. Es dürfen keine Aufnahmen jeglicher Art gemacht oder verbreitet werden, wenn Personen dabei erkenntlich sind. Das bezieht sich auf das Event ansich, die Zeit davor und danach.

This edition of **Global AI Berlin** focuses on one of the most important building blocks of modern AI systems: **AI Memory**. **AI Memory and Founders Night** is an in-person AI meetup in Berlin for **developers, founders, and product leaders** working on **agentic AI systems, AI agents, and production-ready AI architectures**. The event explores how **AI memory**, **knowledge graphs**, **context management**, and **multi-agent systems** are designed and operated in real-world AI applications. The focus is on **practical, production-grade patterns**, not theory. With insights inspired by the Berlin AI ecosystem and organizations such as **Neo4j**, **Google**, **Microsoft**, and **Amazon Web Services**, the talks highlight how teams build **scalable, memory-enabled AI systems** in practice. *** ### Registration (Limited Spots) Primary registration via: [https://globalai.community/chapters/berlin/events/ai-memory-and-founders-night/](https://globalai.community/chapters/berlin/events/ai-memory-and-founders-night/) *** ### Speakers & Topics **Louis Buys** – CEO, Delta Campus *Incubating the Next Generation of Developers and Startup Founders* **Andreas Kollegger** – GenAI Lead, Neo4j *Context Graphs for Agents – What, How, and Why to Act* **Vasilije Markovic** – CEO, Cognee *Building Memory for AI Agents* **Elizaveta Zinovyeva** – Applied Scientist, AWS *Analyzing Codebases with Multi-Agent Systems on Amazon Bedrock* **Christian Kniep** – Agentic Thinker, MemVerge *MemMachine: Agents That Learn, Memory That Lasts* **Abdel Sghiouar** – Developer Advocate, Google *Taming Agentic AI: Running Untrusted Code Safely on Kubernetes* **Christian Glessner** – Microsoft MVP *Microsoft Foundry and Foundry IQ* *** ### Who Should Attend * AI developers and software engineers * Technical founders and startup teams * Product managers and AI architects * Anyone building **agentic AI**, **AI agents**, **knowledge graphs**, or **memory-driven AI systems**

Let’s kick things off for another Meetup, this time focusing on Agentic Deployment and Flink’s Data Platform Ecosystem. Join us on February 26th in Berlin and bring all your questions! : ) **Pawel Wiszniewski: *"From Ingestion to Insight: Flink’s Data Platform Ecosystem"*** [Pawel Wiszniewski](https://www.linkedin.com/in/pawel-wiszniewski/) is a Senior Data Engineer at[ Flink](https://www.goflink.com/shop/de-DE/deals/?campaignid=23008119587&adgroupid=190905032608&creative=676430819949&utm_source=google&utm_medium=search&gad_source=1&gad_campaignid=23008119587&gbraid=0AAAAABiSYNQr0V_xYSzvjjStCH6G-hLqP&gclid=CjwKCAiAkbbMBhB2EiwANbxtbQ-a9DxijUVV0nw5nXTXr037lYGiy6MIv5YbFjeo1qsZJStEPdBNxxoCPFQQAvD_BwE) and a well-known face at our Data Engineering Meetups. We're super excited to see our guest now stepping into the presenter's role. About his keynote: "You have data, analysts, and business use cases. But you can't simply stitch them together with spreadsheets, SQL queries, and Python scripts and still expect business users to trust the dashboards. To ensure data quality, reliability, security and freshness, you need a well organised set of tools and processes: a Data Platform. In this presentation, I will explain how the Data Platform at Flink was built, outline its high-level architecture, and describe the key products, tools, and processes that enable us to operate over a thousand data models and maintain full visibility into the current state of the business." **Sneha Nafade: *"AI Agents & Agentic Deployment"*** [Sneha Nafade](https://www.linkedin.com/in/sneha-nafade/) is a Cloud Architect at [Diconium](https://diconium.com/en/?utm_term=&utm_campaign=2025+%7C+Remarketing+%7C+DE/EN+%7C+All+Visitors&utm_source=adwords&utm_medium=ppc&hsa_acc=9083156072&hsa_cam=23281606208&hsa_grp=&hsa_ad=&hsa_src=x&hsa_tgt=&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gad_source=1&gad_campaignid=23483494785&gbraid=0AAAAADQqBJ6jY8TgZt7Ocjy37F5Gup62I&gclid=CjwKCAiAkbbMBhB2EiwANbxtbfuZyXSVyFENwFuHv9tAcygFWNM24hiXlk3rvKVpwBFfM__jFEBHBRoCMpsQAvD_BwE) with a rich experience in Cloud & Cybersecurity Architecture & Engineering. About her keynote: "AI agents are becoming autonomous digital operators capable of managing pipelines, calling APIs, and responding to live data signals. This session provides a practical guide to designing, deploying, and governing agentic systems in real-world production environments." ✧ ✧ ✧ **What to expect:** * Two expert talks and Q&A * Networking opportunities in our great Creator Space * Some snacks & drinks to fuel your thoughts : ) ✧ ✧ ✧ **Timetable:** * 18:30 - Event admission * 18:50 - Welcome & Introduction * 19:00 - Pawel Wiszniewski: *"From Ingestion to Insight: Flink’s Data Platform Ecosystem"* * 19:30 - 5 minutes break * 19:35 - Sneha Nafade: *"AI Agents & Agentic Deployment"* * 20:05 - Snacks, Drinks & Networking * 21:30 - End ✧ ✧ ✧ More on the **-> [applydata data engineering meetup page](https://applydata.io/data-engineering-meetup/)**. **Our goal is to form a local data-loving community, so join us and let's talk data together!** ✧ ✧ ✧ *At the event, sound, image and video recordings are created and published for documentation purposes as well as for the presentation of the event in publicly accessible media, on websites and blogs and for presentation on social media. By participating the event, the participant implicitly consents to the aforementioned photo and/or video recordings. Find [more information on data protection here](https://applydata.io/events/information-on-data-protection/).*

At MOIA, we believe that to be great, we need to be constantly learning and seeking out new perspectives. MOIA's Mobility Consulting team is happy to invite to another transport modelling meetup at our Berlin office this year. While our own focus is the realistic simulation of our on-demand service with the tool MATSim, we aim to gather insights from the broader transport modeling world and beyond. The goal is to facilitate the exchange of ideas and insights across various institutions. The following speakers will provide insights into their work and the future of mobility: \- Nadine Kostorz \(KIT University\) \- Viktoriya Kolarova \(DLR/atStake\) \- Frank Holzhauser & Mads Berg \(Ruter\) Don't miss out on this opportunity to expand your skill set, meet like-minded people and enjoy some food and drinks on us. Better register now to secure your spot! Timetable: 18:00 Doors open 18:30 Presentations à 5-10 mins 19:50 Networking, drinks and food Language will be English.

[*Registration form required below*] **Interested in Japanese sword fighting or Japanese culture? Come join a trial and experience the traditional Samurai art at Katori Shintō-ryū in Schöneberg.** **Trial Fee**: **25€**/ session (2hr). Classes every Monday, Wednesday and Friday from 19:00 to 21:00. **!!SIGN UP HERE**: [Katori Shinto-ryū Berlin Sign-up (google.com)](https://docs.google.com/forms/d/e/1FAIpQLSeBt4A13VgnEcgQQ2PDaruthmYMRWineG4KtUCKsuC9KBsCUQ/viewform) Registration is required before your participation so that we can prepare enough training equipment. **Address**: Belziger Str. 25, 10823 Berlin. **No previous experience required!** The classes are in English and German. **Our website**: [Kenjutsu Berlin - Official school of Katori Shinto-ryu in Berlin (katoriberlin.org)](https://katoriberlin.org/) **Katori Shintō-ryū** is one of the oldest Japanese sword fighting traditions (koryū) still practised today and is recognized by the Japanese government as a cultural intangeable asset. The school was founded in the middle of the 15th century by Iizasa Chōisai Ienao at the Katori Shrine (Katori jingū) and has become the origin of numerous other martial arts schools over the course of its almost 600-year history. The training consists of the continuous repetition of fixed sequences of movements (kata) and includes the use of classic Japanese weapons such as the sword (iai-jutsu, battō-jutsu, ken-jutsu, ryōtō-jutsu, kodachi-jutsu), the long staff (bō-jutsu), the lance (naginata-jutsu) and the spear (sō-jutsu), as well as unarmed disciplines, tactics and spiritual aspects. **The Katori Berlin dojo** is the only official shibu of Otake Nobutoshi-shihan’s dojo Shinbukan in Germany and fully dedicated to the transmission and study of one martial tradition: Tenshinshō-den Katori Shintō-ryū. Through these efforts we aim to contribute to the cultural preservation of this martial tradition. The dojo has one officially appointed shidosha. **Our sensei**: Sebastian Graetz has been active in martial arts since 1997. After almost 15 years of taekwondo in Berlin, he started with Katori Shintō-ryū in Asia in 2014. Since then, he has studied in Japan with Ōtake Risuke-shihan and Ōtake Nobutoshi-shihan, and in Vietnam with Malte Stokhof-shihandai. In 2023, he received his Menkyo license and permission to set up a training group in Berlin the following year.

## Details It's the first nodeJS meetup for 2026, so reserve your spot and come enjoy an evening of nodeJS talks, pizza, drinks and fun! If anyone wants to present a talk please reach out via message. ### **Presentations ️** Talk One: Processing compute-intensive event-driven tasks in [Node.js](http://node.js/) By: Mohit Karekar In this talk, Mohit will share various ways to process compute-intensive tasks triggered via message brokers like Kafka, asynchronously in [Node.js.](http://node.js./) I’ll share how these approaches compare in terms of performance and some related experiments. Talk Two: The world of WorkFlows and Agents By: Yasser Fadl In this talk, Yasser will introduce modern workflow systems in nodeJS, how they work under the surface, and how AI Agents plugin to ecosystem. ### **Schedule ** 7:00 -> Doors Open 7:15 -> Intro by our amazing hosts at contentful 7:20 -> **First Talk** 7:50 -> Short Break 8:00 -> **Second Talk** 8:30 -> Pizza and Networking 9:40-> Doors close ### **Hosting ** Contentful has offered to host our meetup in their incredible event space in Berlin! This will also include pizza and drinks. I'm extremely grateful for their support and help bringing this meetup back! They are also [hiring](https://www.contentful.com/careers/), come meet some of the team and possibly get a sneak peak at their incredible office when you arrive. ### **Code of Conduct ** We follow the [Berlin Code of Conduct](https://berlincodeofconduct.org/) and expect every attendee to do the same. Let’s ensure a respectful, inclusive, and welcoming environment for all. Thanks and excited to meet you there

Join us for a hands-on workshop by Olena Kutsenko on Wednesday, February 25th from 5:30pm hosted by SPACE SHACK Coworking! **Venue:** **SPACE SHACK Coworking** Akazienstraße 3A, 10823 Berlin, Germany **Agenda:** * 5:30pm – 6:00pm: Welcome, Food/Drinks & Networking * 6:00pm - 8:30 pm: Workshop by Olena ** So that Olena has an idea of audience priorities, please fill in the [pre-workshop form](https://docs.google.com/forms/d/e/1FAIpQLSeJsBjgkL2EXvPtBScXtI5yAv6N9gFg64QmMajMUiMmaPllxQ/viewform?usp=sharing&ouid=117948459316244235775) when you can (no personal info is collected)** ** Speaker & Workshop Details:** Olena Kutsenko, Staff Developer Advocate, Confluent **Hands-on workshop: real-time flight data streaming, anomalies, predictions, and visualizations** **Workshop Overview** In this hands-on session, we'll build a real-time analytics pipeline using flight data and modern streaming tools — step by step, and without hand-waving. We'll start by streaming data into Apache Kafka using Confluent Cloud, process it with Apache Flink, and land it in Apache Iceberg using Tableflow. From there, we'll query the data with Trino and turn it into dashboards using Superset. Everything runs in a practical setup you can reproduce later, including Docker and cloud-managed services. Along the way, we'll also look at anomaly detection and simple predictions using built-in functions, so you can see how real-time insights can be added without building custom ML pipelines or complex models. This session is all about doing, not slides. You'll see how the pieces actually fit together, what decisions matter in practice (regions, credentials, formats), and how to go from streaming data to analytics in a way that scales. If you're curious about real-time analytics, Kafka + Flink in the cloud, or how streaming, analytics, and lightweight predictive use cases come together in the same pipeline, this workshop will give you a clear, working mental model — and code you can take home. No prior experience with Kafka, Flink, or Iceberg required! Just bring your curiosity and a laptop! **Technical Prerequisites:** To make sure you can get hands on during this workshop, please make sure the following are installed on your system (**Make sure your bring your laptops!)** **1\. GitHub Account** * **Zero Install (Recommended)**: Use GitHub Codespaces or open in Dev Container - everything pre-installed! **2\. Local Setup: Install the tools below on your machine \(takes \~10 minutes\)** * [VSCode with Confluent Extension:](http://%5Bhttps//%5Bdocs.confluent.io/cloud/current/client-apps/vs-code-extension.html%5D%5D(docs.confluent.io/cloud/current/client-apps/vs-code-extension.html%5D)(%5Bhttps://docs.confluent.io/cloud/current/client-apps/vs-code-extension.html%5D(https://docs.confluent.io/cloud/current/client-apps/vs-code-extension.html))) For accessing Confluent Cloud resources. * [Confluent CLI:](http://%5Bhttps//%5Bdocs.confluent.io/confluent-cli/current/install.html%5D%5D(docs.confluent.io/confluent-cli/current/install.html%5D)(%5Bhttps://docs.confluent.io/confluent-cli/current/install.html%5D(https://docs.confluent.io/confluent-cli/current/install.html))) To interact with Kafka clusters and topics. * [Install DuckDB:](https://duckdb.org/docs/installation/) For querying Tableflow Iceberg tables. **3\. Correctly setting up your Confluent Cloud account** ##### **This step is optional, as we will go through how to set up Confluent Cloud during the event. However, if you want to get ahead, make sure you sign up, as so, to make sure you don't have to input your Credit Card:** Use the code '**CONFLUENTDEV1**' when you reach the payment methods window [after signing up for Confluent Cloud via this link.](https://www.confluent.io/confluent-cloud/tryfree/?utm_source=meetup&utm_medium=eventpage&utm_campaign=tm.devx_ch.cryptoworkshop) [\[More info about the workshop can be found here\](More detail about the workshop, including detailed agenda)](http://%5Bmore%20info%20about%20the%20workshop%20can%20be%20found%20here%5D(more%20detail%20about%20the%20workshop,%20including%20detailed%20agenda)/) \*\*\* DISCLAIMER We don't cater to attendees under the age of 18. If you want to host or speak at a meetup, please email [community@confluent.io](http://community@confluent.io/)

Get hands-on with Google Agent Development Kit (ADK), Google’s framework for building, evaluating, and deploying AI agents. You'll progressively learn to design advanced agents and train them to play the text-based adventure game “The Garden of the Forgotten Prompt”. Get ready to explore a mysterious world, solve puzzles, and uncover secrets! Agenda: ▶️ 6:00 pm: Doors open with networking and snacks ▶️ 7:00 pm: Opening Keynote ▶️ 7:15 pm: Workshop (Laptops are required. Please charge them in advance!) Abdelfettah Sghiouar (Abdel) - Cloud Developer Advocate @ Google Cloud Daniela Petruzalek - Senior Developer Relations Engineer @ Google Cloud ▶️ 9:00 pm: Network & Drinks ☕ ▶️ 9:30pm: Doors close Google Cloud Credits We’re planning to offer Google Cloud credits to attendees so you can explore and experiment on GCP during the event. Activation details and instructions will be shared on-site. Agenda --- Speakers Daniela Petruzalek - Google (Senior Developer Relations Engineer @ Google Cloud) Abdel Sghiouar Hosted By Yevgen Batovskyi, Organizer Esra Kadah, Organizer Senior App Developer | Author of "Flutter Design Patterns & Best Practices" | Co-Organizer of Flutteristas, Flutter Berlin, GDG Cloud Berlin, Flutter Community AI Circle | ‍ Antigua Mobile Hany Elfouly, Co-founder & CEO Mohamed Islem Ayari, Organizer --- Partner Google (https://blog.google/intl/de-de) --- Complete your event RSVP here: https://gdg.community.dev/events/details/google-gdg-cloud-berlin-presents-hands-on-with-agent-development-kit-adk-google-office/.

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. (NOTICE - Location change!) This session will be at the Karl Road Branch of the Columbus Library in the Conference Room 2.

Bring your Raspberry Pi, Arduino, microcontroller, or any other electronic project and join fellow electronics makers for a night of creativity and collaboration! This session is open forum to share your current projects—whether complete or in progress, it’s all interesting! Whether you’re deep into embedded systems, exploring new ideas, or just getting started, you’ll find a welcoming space to collaborate, share, and get inspired. **New to electronics or curious about tinkering?** You’re absolutely welcome. If you’re a beginner and want to experiment, I’ll have a couple of starter kits available so you can try things out—whether that’s blinking your first LED, putting something on a display, or experimenting with simple sensors. No pressure and no experience required—just an interest in learning and building. While we continue to pursue a more permanent venue for this Meetup, we’ll be using public library facilities based on availability. This session will be at the Worthington Park Library in the Olentangy Meeting Room.

Join other experienced and aspiring agile coaches and professionals to: * develop and practice your coaching skills in a peer-to-peer environment * share current successes and challenges in your work environment and get support from each other * learn from each other, build better relationships and experiment with new ideas

Come check us out! You will have a wonderful time! The music and friendships are life-changing!

Join the Columbus AI community for our quarterly gathering — a casual, community-focused evening where everyone has a chance to share, learn, and connect. These open mic–style events give anyone in the community up to **5 minutes** to present a project, share a tool, pose a question, or offer a perspective on the evolving AI space. No slides required — just a welcoming space to exchange ideas and keep the local AI conversation moving. If you’d like to take the stage, message **Chris (the organizer)** with a **title and short description** of what you’d like to share. Whether you’re deep in the field or just getting curious, come connect with others building and exploring AI in Columbus. Sponsored by [Transform Labs](https://www.transformlabs.com/services)

Connected Westerville Night of Networking flips the script on networking, with surprises and connections that'll make you say, "Who knew networking could be this much fun?!"

**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** *Spec-Driven Development with GitHub Spec-Kit: From Intent to Implementation* Spec-driven development flips the traditional workflow on its head: instead of code being the source of truth, the specification becomes the backbone of design, collaboration, and delivery. In this session, we’ll explore how GitHub Spec-Kit enables teams to treat specifications as first-class artifacts—living documents that drive architecture, implementation, and verification. You’ll learn how Spec-Kit helps teams clearly express intent using structured, version-controlled specs that live alongside code. We’ll walk through a practical workflow that starts with defining system behavior and constraints, then progressively refines those specs into testable, automatable outcomes. Along the way, we’ll show how specs can reduce ambiguity, improve cross-functional collaboration, and make design decisions explicit before a single line of production code is written. This talk will cover: --What spec-driven development is (and what it isn’t) --How GitHub Spec-Kit fits into modern developer workflows --Using specs to align product, engineering, and AI-assisted development --Real-world examples of turning specs into implementations with confidence Whether you’re building greenfield systems, integrating AI into your stack, or trying to reduce costly rework, spec-driven development offers a scalable way to move faster without sacrificing clarity. Attendees will leave with concrete patterns and a clear mental model for adopting GitHub Spec-Kit in their own projects. **YouTube Link** TBA