Internet of Things (IOT)

Join us for a relaxed Monday evening full of new faces, unexpected conversations and the kind of atmosphere that makes the week feel a little more alive. Whether you’re new in Berlin or simply looking to meet open-minded people, this is a space to connect, share stories and start the week with a little more curiosity. Orga The location accepts only card payments. We will be sitting in the first room. Questions? Check our Meetup-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. Love the vibe? There’s a whole community waiting for you. 🦋 Join the Social Butterfly Club and experience Berlin together [https://socialbutterflyradar.substack.com/](https://socialbutterflyradar.substack.com/)

In a world that unfolds behind the screen, working from home feels gradually more lonely and disconnected. Weather you are an employee without an office, a creative, a freelancer or just someone in need of a working space, this is for you. You don’t need to cross the city to find a working space anymore, your favourite coworking space just landed in Sonnenallee. Every Monday and Thursday From 10:00 until 16:00 In the indoor room of @sfera Free water and wifi

[*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.

English below Liebe Nachbarn und Freunde, Kommt vorbei und lernt eure Nachbarn kennen bei einer Runde Wizard, Just One, Dixit, Fluxx, und noch viel mehr. Ihr dürft natürlich eure Lieblingsspiele mitbringen und sie uns beibringen, falls wir sie noch nicht kennen. Teilnahme auf Spendebasis. Wo: offenes Wohnzimmer, Waldenserstr. 13, 10551 Berlin http://www.offeneswohnzimmer.org/ Dear neighbors and friends, The Offenes Wohnzimmer is hosting the next board game night. Come around and meet your neighbors around a game of scrabble, cards and more. You’re welcome to bring your favorite games. Participation donation based 🙂 http://www.offeneswohnzimmer.org/ Anmeldung: tanjaklett@gmx.de oder spontan !

\*\*\* English below \*\*\* ### Einladung **Du bringst die Frage** **Das Spiel bringt die Klarheit** **Wir halten den Raum** Du bist herzlich eingeladen, gemeinsam mit anderen einen achtsam gestalteten Raum für tiefgehende Fragen und persönliche Klärung zu betreten. Der Flow Game Salon bietet dir die Gelegenheit, mit einer für dich bedeutungsvollen Frage präsent zu sein – und im Kreis neue Perspektiven und Resonanz zu erleben. Das Flow Game ist ein dialogisches Reflexionsspiel, das dich einlädt, innezuhalten, zuzuhören und Impulse für das zu empfangen, was in deinem Leben gerade zählt. Keine Vorkenntnisse erforderlich! **Ort:** Facilitation Academy, Wilhelmshavener Street. 18, 10551 Berlin **Sprache:** Meist Deutsch oder Englisch (wir passen uns an, nach Bedarf) **Spendenbasis:** 20–50 € pro Person inkl. Hosting, Vorbereitung, Raum und Snacks (Empfehlung) ### 🕒 Ablauf (ca.) * **15:45 – 16:00** – Ankommen * **16:00 – 16:45** – Check-in-Fragen & Café * **16:45 – 19:30** – Flow Game spielen (im Kreis oder in Kleingruppen) * **19:30 – 20:00** – Reflexion & gemeinsamer Abschluss ### Praktisches * Komme gern in bequemer Kleidung – wir sitzen und bewegen uns vielleicht leicht im Raum. * Es gibt Tee, Kaffee, Wasser und kleine Snacks. Wenn du etwas Besonderes mitbringen oder teilen möchtest, sehr gerne! * Wir sind ein wechselnder Kreis von Gastgeber:innen aus dem Berliner Flow Game Netzwerk. Die jeweils anwesenden Hosts bestätigen ihre Teilnahme im jeweiligen Event. * Je nach Gruppengröße spielen wir in einem gemeinsamen Kreis oder in parallelen Gruppen in verschiedenen Räumen. Wir freuen uns auf dich – und deine Frage. Jede Perspektive bereichert den Kreis, unabhängig von deiner bisherigen Erfahrung mit dem Flow Game. Herzlich, das Flow Game Salon Team **\*\*\* english Version \*\*\*** **Invitation** **You bring the question** **The game brings the clarity** **We hold the space** You are invited to join others in a mindfully designed space for deep questions and personal clarification. The Flow Game Salon offers you the opportunity to be present with a question that is meaningful to you - and to experience new perspectives and resonance in the circle. The Flow Game is a dialogical reflection game that invites you to pause, listen and receive impulses for what matters in your life right now. No previous knowledge required! Location: Facilitation Academy, Wilhelmshavener Street. 18, 10551 Berlin Language: Mostly German or English (we adapt as needed) Donation basis: 20-50 € per person incl. hosting, preparation, room and snacks (recommended) **Schedule (approx.)** 15:45 - 16:00 - Arrival 16:00 - 16:45 - Check-in questions & café 16:45 - 19:30 - Play flow game (in a circle or in small groups) 19:30 - 20:00 - Reflection & closing together **Practical** * Come in comfortable clothes - we may sit and move around the room slightly. * There will be tea, coffee, water and snacks. If you would like to bring or share something special, please feel free! * We are a rotating group of hosts from the Berlin Flow Game network. The hosts present confirm their participation in the respective event. We look forward to hearing from you - and your question. Every perspective enriches the circle, regardless of your previous experience with the Flow Game. Sincerely, the Flow Game Salon Team

Join and let's have an unique swing experience! **Discover fresh arrangements specially created for dancers, performed LIVE in the stunning Ballhaus Berlin!** It's a unique chance to dance to the sounds the leading Big Band in Berlin and have an unforgettable time. Mark the dates: **📅 5. Januar 📅 12. Januar 📅 2. Februar 📅 2. März 📅 16. März 📅 20. April 📅 4. Mai 📅 18. Mai 📅 1. Juni 📅 15. Juni 📅 6. Juli 📅 20. Juli** Location remains king: 📍 Ballhaus Berlin Ballroom, Chausseestraße 102 Program: 🎓 19:00: Swing dance introduction with Swing Base (No partner and no prior knowledge necessary!) 🎺 20:00: Big Band concert (2 Sets) + DJ 🎫 Ticket prices for dancers €20 (instead of €25!) only with prior reservation! Reservation here: [https://swingbase.de/mondayswing](https://swingbase.de/mondayswing) "Swing Is On Parade" is more than just music – it's an invitation to swing through the night with us.

Join us for a creative gathering for neurodivergent people, including those with autism, ADHD, AuDHD, dyslexia, and similar neurodivergences. **At this edition of the Creative Sharing Circle we want to show you how to fold zines**. We will show you how to fill paper with text, drawings and collage. The **content can be political, fun or introspective**. Zines are a great accessible way to communicate something meaningful you‘d like to share with the world. **Zine culture is intimately intertwined with liberation movements of marginalized people.** Let‘s keep it alive and enrich it with **neurodivergent perspectives.** We will provide some arts and crafts equipments but feel free to bring your own arts and craft tools if you want to do your own project. The facilitators will also guide you on how to create zine and how to use the arts and craft material. **The event is free and there will be no donation box at the event, but your support is very much welcomed Donation Link: [Ko-fi](https://ko-fi.com/neurodivergentberlin)** **Where:** PopUp Gruppenraum 2 at Amerika Gedenkbibliothek **Facilitators:** [Agnieszka Błaszczak ](https://www.instagram.com/foxyberlin21/)(Aga), a multimedia artist, and [Cosmo](cosmo@kritische-maennlichkeit.com) (Visual Anthropologist). **Important Notes:** * If you can’t attend, please edit your RSVP to give the spot to others people. * The community is run by neurodivergent volunteers, so please help us create a positive experience. * Bring sensory tools (headphones, stimming toys, etc.), and we will have some available. * A quiet corner will be provided for breaks. * This event is for late-diagnosed adults (18+). For children’s events, a parent or guardian must be present. See you there!

Hello everyone! The German Testing Board (GTB), together with our partners IREB, iSAQB, and the Einstein Center Digital Future, warmly invites you to **“Quality is NOW – Networking Around Quality Engineering”** in Berlin. Join us for an inspiring evening of networking, engaging discussions, and new connections. Following short talks from the worlds of Requirements Engineering, Software Architecture, and Quality Engineering, we will explore the question: **How is AI changing the world of software development?** During a World Café session and informal networking afterwards, we'll tackle the questions everyone is asking right now: \- What's your biggest pain point when using AI? \- Has AI improved or compromised quality in your projects? \- Which skills do teams and leaders need to succeed with AI? \- And where should we focus our efforts next? Join the conversation, exchange experiences, and discover how others are navigating the opportunities and challenges of AI-driven software development. **What to expect** * **Inspiring insights:** Gain practical tips and fresh perspectives for your career in Quality Engineering. * **Meaningful connections:** Meet developers and quality engineering professionals who share your passion. * **A relaxed atmosphere:** Enjoy drinks, delicious food, and great conversations in an inspiring setting. 📅 **When?** 8 July 2026 – Doors open at 5:30 PM (Event: 6:00 PM–9:00 PM) 📍 **Where?** Einstein Center Digital Future, Wilhelmstraße 67, 10117 Berlin 🎟 **Free admission** – Please register We look forward to seeing you there! **Your “Quality is NOW” Team**

Register: [https://globalai.community/e/7lns53g4](https://globalai.community/e/7lns53g4) ## Connected Intelligence: AI Builders Meetup — WeAreDevelopers PreDay, Berlin AI agents are moving into production. The question is no longer whether to use them, but what it actually takes to make them work once the demo is over. This WeAreDevelopers PreDay meetup is for builders, founders, and practitioners wiring AI agents into real codebases, CI/CD pipelines, developer platforms, and knowledge systems. The evening focuses on the honest conversations that rarely fit into a conference talk: what breaks at scale, what context engineering really looks like, and where the failure modes hide. The theme is **connected intelligence**: how graph-based reasoning, smarter pipelines, and agentic code review are changing production AI systems, and what engineering teams need to do differently to support them. We will explore constraint satisfaction in agent decision-making, agentic AI in production, AI-powered development workflows, and Java’s role in the future of AI systems. No vendor pitches. Just the stuff that runs in production.

International Meetup for those who still like to follow the Peaceful teachings of Christ. We are free and curious humans, try to practice patience, kindness, humanity, etc, and have the freedom to read any book of the world, including the Gospels. Let's support each-other, upbuild faith, and find some like-minded friends in our community. (If you are a new believer, you are also welcome only if you have been practicing Christianity regularly for at least since last 3 years. )

**[IMPORTANT NOTICE registration is HERE](https://luma.com/wh28yfqv)** ​**Please bring a valid ID (driving licence or passport) with you on the day, as it will be required for entry to the venue.** Join **Aerospike** **AWS, Adjust and Miro** for an evening of technical talks focused on the challenges of running real-time, business-critical systems at scale. Hear firsthand lessons from engineers managing large datasets, database migrations, and cloud infrastructure availability in production. From Miro's Redis-to-Aerospike migration on Kubernetes to AWS best practices for capacity planning and resilience, speakers will share practical insights gained from operating demanding workloads where performance and reliability matter. ​Connect with fellow engineers, architects, and technology leaders from Berlin's tech community over drinks and networking. ​ ​**Agenda** **17:30 – 18:00 - Welcome & networking** **18:00-18:10 - Speed vs Capacity: Designing Data Systems for Real-Time Scale** *Dirk Möller, Regional Lead Germany and EE, Aerospike* In high-performance data systems, balancing RAM and disk is key to real-time performance at scale. This session explores the technical nuances of database architecture in today’s AI-driven era, where workloads demand low latency, massive scale, and adaptive infrastructure. Drawing on real-world, mission-critical systems, we’ll show how to achieve the right mix of speed, scale, cost-efficiency, and reliability - designing architectures that meet today’s real-time demands while staying sustainable and affordable. **18:10 – 18:30 - Scaling Beyond Millions of Transactions** *​Leonardo Muñoz, Platform Engineer, Adjust* A behind-the-scenes look at how Adjust powers high-throughput, low-latency workloads at scale using a distributed database platform running on bare metal infrastructure. Leonardo will explore the architectural and operational decisions behind the deployment, the challenges of managing dedicated hardware at scale, and the lessons learned from years of production experience supporting mission-critical workloads. **18:30 – 18:50 - Pod Ready ≠ Data Safe: Migrating a Critical Dataset on Kubernetes** *Yuriy Chernikov, Staff Software Engineer, Miro* ​ Miro migrated one of its most critical datasets from a legacy caching platform to a modern distributed database running on Kubernetes - and not everything went according to plan. This practical talk covers what the migration actually required, the design decisions that made failures survivable, and the operational lessons that only emerge when managing datasets measured in terabytes. **18:50-19:10 - Managing Amazon EC2 Capacity and Availability** *Nati Cohen, Sr. Specialist Solutions Architect, Compute, AWS* ​ Modern data-intensive applications require infrastructure that delivers high performance, scalability, and resilience. Organizations often seek to leverage the latest storage-optimized EC2 instances, select larger instance sizes for improved performance, place infrastructure close to data producers and consumers, and scale efficiently as business demands grow. In this session, we'll explore how to balance these performance requirements with cost optimization and capacity availability. We'll review the various EC2 capacity and reservation models, including Capacity Reservations, On-Demand Instances, Savings Plans, and more. Learn how to combine these options to optimize cost, performance, and availability for large-scale production workloads **19:00-20:00- Networking** **[IMPORTANT NOTICE registration is HERE](https://luma.com/wh28yfqv)**

Every Wednesday we come together for drinks, conversations, and new connections. Some people stop by after work, others make an evening of it—but everyone is welcome. Whether it's your first Social Butterfly meetup or you're already part of the community, you'll always find friendly people and great conversations. Orga The location is **cash only**. It is non-smoking (with a separate room for smoking). We’ll be sitting on the couches in the first room. Questions? Check our Meetup-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/) Love the vibe? There’s a whole community waiting for you. 🦋 Join the Social Butterfly Club and experience Berlin together: [https://socialbutterflyradar.substack.com/](https://socialbutterflyradar.substack.com/)

Just before everyone disappears for the holidays, let's get together for one more Java meetup! This time we're joining forces with **Spring User Group**, and thanks to our friends at **JetBrains**, we'll be meeting at their office. We'll also have a raffle featuring **WeAreDevelopers World Congress** tickets and other prizes. \#\# 🎤 Alexei Zinoviev *Software Developer at JetBrains* ### **Kotlin and Spring Boot: From Messy Public Data to a Robust Application** Real applications rarely get clean input. Source pages change, fields are missing, text formats are inconsistent, parsers make assumptions, and external services such as geocoders can be slow, incomplete, or temporarily unavailable. In this talk, we will use a small Berlin-focused Spring Boot application written in Kotlin. It reads public demonstration data, parses semi-structured HTML, converts raw rows into a typed domain model, applies classification rules, geocodes locations where possible, and exposes the result through a Spring MVC API, an interactive map, and a timeline. The Kotlin part is not a rewrite pitch. Spring Boot stays the familiar foundation for controllers, services, scheduling, database access, and operational endpoints. Kotlin helps in the parts where enterprise code often becomes defensive and noisy: nullable input, parsing results, rejected rows, domain identifiers, explicit states, and readable transformation pipelines. A central part of the example is a small Kotlin DSL for rules. The classifier is not AI and not a black box: rules are written as type-safe Kotlin code, close to configuration, readable in the IDE, and able to explain why a certain operational risk score was assigned to an event or route. We will also look at what makes the application robust in practice: handling parser failures, conversion problems, missing coordinates, partial results, and unstable external services without turning every expected problem into a generic HTTP 500. \#\# 🎤 Dmitry Chuyko *Architect at BellSoft* \#\#\# From Kitchen to Table: A Safe Software Journey with SBOMs The EU's Cyber Resilience Act (CRA) is turning Software Bills of Materials (SBOMs) from a "nice to have" into a legal requirement for many software products. Managing your software supply chain is no longer optional—it's part of shipping software responsibly. Think of your containerized Java (and Spring) application as a dish served to production. Every ingredient matters, and someone will eventually ask what's inside. SBOMs are the ingredient lists that security scanners, auditors, and regulators rely on. In this practical session, we'll look at how Java and DevOps teams can make SBOMs part of their everyday workflow. We'll cover: * generating and managing SBOMs in CI/CD (GitHub Actions and GitLab CI) * verifying pre-built container images * enforcing supply-chain policies in Kubernetes with OPA and Ratify * navigating SPDX vs. CycloneDX * integrating SBOMs into existing toolchains without unnecessary complexity Rather than treating SBOMs as compliance paperwork, you'll learn how to use them as actionable security artifacts that improve visibility, strengthen your software supply chain, and help meet regulatory requirements. \#\# Schedule **18:00** – Doors open **18:30** – Alexei Zinoviev **19:00** – Networking break **19:30** – Dmitry Chuyko — *From Kitchen to Table: A Safe Software Journey with SBOMs* **20:30** – Networking, refreshments, and the **WeAreDevelopers World Congress** ticket raffle

Wir bieten allen Interessierten die Möglichkeit, mit Elektronik zu basteln. Workshops und Vorträge zu verschiedenen Themen rund um Elektronik und Software sind willkommen. Von Arduino bis zu komplett selbst entwickelten High-End Schaltungen sind wir für alle kreativen Ideen offen. Wir haben auch Gruppen rund um das Nähen, Programmieren, Retro Computer. Wir treffen uns immer am Dienstag und am Freitag ab 18:00 Uhr. Egal ob Anfänger oder Profi – hier seid Ihr jederzeit Willkommen. Ihr könnt mit anderen fachsimpeln oder auch mit unserer Hilfe Eure ersten elektronischen Gehversuche starten. Wenn zeitgleich in den vorderen Räumen Workshops oder Vorträge stattfinden, kann hinten Werkstattbetrieb stattfinden.

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.

Topic to be announced. **CALL FOR SPEAKERS** Learn more: https://www.awscolumbus.com/get-involved/ **THANK YOU** *VEEAM* for hosting our meetup! To learn more about *Veeam*, please visit their website: https://www.veeam.com/ **DIRECTIONS** 8800 Lyra Dr #450 · Columbus, OH go to 4th floor. **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

**Practical Curiosity: Learning from Everyday Data** How do we actually get better at utilizing our day-to-day data? Fancy dashboards and complex models might look nice and draw attention, but that’s not where most of us spend our time. In fact those shiny outputs frequently sit unused, while the real insights are drawn from the analyst’s daily practice. Sometimes it’s as simple and as powerful as noticing that a segment is shrinking, a channel is underused, or certain links keep getting all the clicks. There’s many different places that the spark of insight can come from, but you have to keep your head in the data and know where to look. In this session, we’ll explore real-world examples of how segmentation, testing, and click behavior can uncover practical digital marketing opportunities. You’ll leave with inspiration for your own use cases, along with a few simple ways to ask better questions, spot meaningful patterns, and make smarter decisions without overcomplicating it. **About Our Speaker:** [Elaine Armbruster](https://www.linkedin.com/in/elainearmbruster/) is a Director of Digital Experience at the [American Diabetes Association](https://diabetes.org/), where she focuses on using data and insights to create smarter, more effective digital experiences. A lifelong Columbus resident, she has built her career in email marketing and the broader digital user journey, and is finding she most enjoys working in the messy middle where systems, data, and big ideas don’t quite line up yet. 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)

You can sleep in on the Semiquincentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/azure-cbus-2026/