Ham Radio

We're thrilled to welcome you to the Berlin Ethereum Meetups! Join us as we explore technical and non-technical topics and new ideas, collaborate on projects, and connect and grow our community! Our meetups are open to all - from those new to Ethereum to long-standing community members and developers. 🗓️ **Agenda** *(subject to change)* 🕕 6:30 - 6:45 pm - Arrivals 🕡 6:45 - 7:00 pm - Ecosystem & Community Updates by Eniko (Ethereum Foundation) 🕡 7:00 - 7:20 pm - Building a Truly Trustless Ethereum Wallet for Android by Dirk Jäckel (independent developer) *Every Ethereum wallet you've ever used secretly trusts a server, and they all silently query centralized RPC providers. This talk presents a different approach: an Android wallet library that eliminates the RPC dependency entirely.* 🕖 7:20 pm - 9:00 pm - Open discussions and community networking 👩‍💻 Full Node is also excited to offer free coworking for all event attendees on the day of the meetup, starting from 9:00am. Feel free to come by Glogauer Str. 6 early and get some work done! Berlin is one of the most vibrant hubs for Ethereum builders, researchers, and advocates of privacy, decentralization, and open-source technology. Whether you’re here to learn, contribute, or simply connect, join us as we continue building the next chapter of Ethereum in Berlin. The talks will be recorded and uploaded to our [Youtube channel](https://www.youtube.com/@ethereumberlin). Subscribe to stay up to date! Apply to speak at our future meetups: [Speaker Application](https://forms.gle/5y9Y5ywZC7pSEqpV9)! The event is sponsored by [Gnosis](https://www.gnosis.io/). To learn more about Ethereum, go to [ethereum.org](http://ethereum.org/) (content available in many different languages).

We make landladies and landlords. They buy a flat and pay just 1/4. 3/4 come from tax cuts and tenants. It's not a trick. It's government policy. All German Federal Governments, past and present, of whichever party, want taxpayers to become landlords and -ladies, buy property, rent it out to tenants and enjoy passive income later. Come here and find out. No strings attached. No sales. Just a meet and greet for orientation. Wir machen Vermieter. Steuerzahler kaufen eine Wohnung und zahlen dafür nur 1/4. Mieter und Finanzamt zahlen 3/4. Das ist kein Trick. Das ist Politik: Alle Bundesregierungen wollen, dass Steuerzahler Vermieter werden, Wohnungen kaufen, Mieter reinnehmen und später Beton‑Rente bekommen. Info-Abend nur zur Orientierung. Kucken kostet nichts. S,U Bahnhof Zoo, Kantstraße 163-165, 10623 Berlin, Motel One Upper West, 10th floor, turn left, circumvent the sign "vorübergehend geschlossen" Go justs there. I'll be there. Georg Holzach. 0177 8181 900 WhatsApp

Bitte kauft in den Restaurants mindestens einen Artikel, damit wir keinen Ärger mit dem Manager bekommen. -> Location Berlin Potsdamer Platz -> The Playce -> Manifesto Markt Wir sitzen unten oft an den großen runden Tischen vor dem Restaurant Kumpir'a oder an den langen Tischen vor dem Pizza und Pasta Restaurant im Erdgeschoss. Dieses Treffen ist für: -Internationale Teilnehmer aus allen Ländern, die auf Deutsch Kontakte knüpfen wollen. -Deutsch-sprachige, die in netter Gesellschaft anderen helfen wollen, Deutsch zu sprechen, oder nur neue Kontakte knüpfen wollen.

We make landladies and landlords. They buy a flat and pay just 1/4. Tenants and tax cuts pay 3/4. It's not a trick. It's government policy. Our Federal Governments, past and present, want taxpayers to become landlords and landladies, buy property, rent it out to tenants and enjoy passive income later. Come check this out. No strings attached. No sales. Just a meet and greet for orientation. And an after work drink. Wir machen Vermieter. Steuerzahler kaufen eine Wohnung und zahlen dafür nur 1/4. Mieter und Finanzamt zahlen 3/4. Das ist kein Trick. Das ist Politik: Alle Bundesregierungen wollen, dass Steuerzahler Wohnungen kaufen, Mieter reinnehmen und später Beton‑Rente bekommen. Info-Abend nur zur Orientierung. Kucken kostet nichts. S,U Bahnhof Zoo, Kantstraße 163-165, 10623 Berlin, Motel One Upper West, 10th floor, exit lift to the right, turn left, circumvent the sign "vorübergehend geschlossen" Go justs there. I'll be there Georg Holzach. 0177 8181 900 WhatsApp Wanna read somethin before: landlord.holza.ch betonrente.holza.ch

Dear Kotlineers, After a slightly longer break than planned - we are back! This time we meet in the chambers of **voize GmbH** \- one of Berlin's \(if not the\) most flourishing startups\. As the flowers open and the days stretch long, we're dancing into May with some talks. **Line-Up:** 👉 **Coroutines behind the scenes** by *Sergey Shkurov* Have you ever wondered how Kotlin coroutines actually work under the hood? In this talk, we dive into the JVM bytecode behind suspend functions and reconstruct the state machines step by step. You’ll follow a hands-on exploration of real compiled code and see how continuations and suspension actually work. 👉 **YOUR TOPIC HERE** by *TBD* **Speaker Bios:** 🗣 *Sergey Shkurov* A Kotlin enthusiast since 2019. 🗣 *YOUR NAME HERE* TBD

Bitte via Mail anmelden: anmeldung@gedoplan.de **Referent:** Martin Boßlet, Berater, Dozent und Softwareentwickler **Datum und Uhrzeit:** Donnerstag, 30.04.2026, 18:00 – ca. 19:30 Uhr **Ort:** Online mit Zoom Seit zwei Jahren reden alle über KI-gestützte Entwicklung - und vieles klingt gleich: Gestern war Prompt Engineering der Beruf der Zukunft, heute ist es Context Engineering. Claude Code gegen Codex, GitHub Copilot vs. Cursor, Tool-Vergleiche hier und da. Die Älteren unter uns werden sich mit einem Schmunzeln an Vim vs. Emacs erinnert fühlen. Während CEOs bis hin zum Digitalminister den Untergang der programmierenden Zunft ausrufen, wenden sich viele Entwickelnde frustriert ab. "Das ist nichts für mich" - diesen Satz hört man oft. Die Branche scheint sich in zwei Lager zu spalten: auf der einen Seite diejenigen, die KI fast schon aus Trotz konsequent ablehnen, auf der anderen KI-Propheten, die zumindest der Erzählung nach ihren kompletten Alltag mit KI bestreiten und der Konkurrenz schon längst meilenweit voraus sind. Die eigentliche Frage lautet: Warum gehen die Erfahrungen so weit auseinander? Die These dieses Vortrags: Der Engpass liegt meist weder im Modell noch im nächsten "Tool du jour", sondern in fehlendem, verstreutem oder nur implizit vorhandenem Kontext. Der Schlüssel zu erfolgreicher KI-Zusammenarbeit liegt deshalb nicht in besseren Tools oder clevereren Prompts, sondern in der ältesten Technologie der Menschheit - Sprache. Genauer gesagt: in Markdown als universeller Schnittstelle zwischen Mensch und Maschine. Anhand von Architecture Decision Records (ADRs), Mermaid-Diagrammen, **[AGENTS.md](https://www.linkedin.com/safety/go/?url=http%3A%2F%2FAGENTS%2Emd&urlhash=jh-H&mt=F7bnie71WnYrGR3aD-BiSMeaQCiWniKDxaG65SbBgq37lq5u7OZ1P6NjRp-YTlrvhyBy30Lf47AWfYCmtVLwNg99MBUc-2e8qYUzQLXNViKKD4LeW5gizS3yWw&isSdui=true)**-Datei und Agenten-Skills zeige ich, warum Text-First Development kein Retro-Trick ist, sondern ein praktikables Arbeitsmodell für die KI-Ära. Wer Architektur, Entscheidungen und Konventionen in Text statt in Tickets, Chat-Verläufen oder auch nur an der Kaffeemaschine festhält, bekommt bessere KI-Ergebnisse, mehr Präzision und weniger Nacharbeit. Und ganz nebenbei entsteht endlich wieder etwas, das in der Softwareentwicklung jahrzehntelang zu teuer war: aktuelle, brauchbare Dokumentation für Mensch und Maschine. Kein Talk über Prompt-Hacks, Tool-Vergleiche oder das Tool der Woche, sondern über eine einfache, praktische Frage: Wie müssen wir Software bauen, damit KI-Unterstützung nicht nur beeindruckend wirkt, sondern dauerhaft nützt? Die Antwort ist überraschend einfach: kein Tool-Zirkus, kein Hokuspokus. Einfach nur Text. Nach Ihrer Anmeldung schicken wir Ihnen den Anmeldelink zu.

Come along, grab a coffee, shut up, and write! We will do at least two sessions of each 45 minutes of writing and two breaks. We will start the first writing session at 10:45. For space reasons we only allow a limited number of attendees, so please update your RSVP if you can't come. We'll probably be grouped around the large table in the back room's center. In the summer, also outside. Looking forward to seeing you there!

**Relax. Connect. Create. ☕** After a full week of work, meetings, study sessions and life in fast-forward, it’s time to slow down. Join us this Saturday afternoon in Berlin for a relaxed coffee hang-out where this week's agenda is good company & warm drinks. You're also invited to bring some boardgames, drawing/coloring materials (I will bring an adult coloring book) **What’s the plan?** We’ll meet in a cosy spot, draw, chat about everything and nothing, swap stories and simply enjoy the moment. No pressure. No formalities. Just a bunch of friendly people sharing a Saturday coffee. **Who’s welcome?** Everyone! Whether you’re a Berliner born and raised, newly arrived in the city, from Germany or abroad, if you like meeting open-minded folks and spending some relaxed time—come join us. **When & how?** Saturday afternoon. Detailed time and place in our Telegram group. ➡️ Join us on Telegram: [https://t.me/berlinsaturdaycoffee](https://t.me/berlinsaturdaycoffee) Hop in, say hello, and we’ll share the final details. **Why join?** * Because you deserve a break. * Because you enjoy being creative. * Because you enjoy boardgames * Because meeting new people sparks fresh energy. * Because coffee tastes even better when shared. * Because Saturday afternoons were made for this. Respect and Safety: There is always at least one organizer present at every meetup. If you ever feel unsafe or bothered by someone’s behavior, you can reach out to an organizer privately. Your identity will remain confidential, your concern will be taken seriously, and no inappropriate behavior is tolerated — anyone making others feel uncomfortable will be removed from the group immediately. We hope to see you there. Bring yourself, your smile, drawing materials, your stories—or just your comfy self. Let’s make Saturday a little more laid-back, a little more social and a lot more nice. See you soon! —Your Saturday Creative Coffee Crew ☕

**⭐ DOORS OPEN AT 19:30. PLEASE ARRIVE BEFORE 8PM! ⭐** The Creative Code Stammtisch is a casual show-and-tell for artists, makers, designers, coders, performers, learners and anyone interested in the use of computing skills for artistic expression. The event is free and open to all, regardless of age, origin, gender or experience. Beginners and first-timers should feel especially welcome! You don't have to be a coder yourself 😃 HOW TO FIND US? Find Prachtsaal Studio by crossing the courtyard next to Cafe Augusta on Jonasstr. 22, 12053 Berlin. WHAT SHOULD I EXPECT? We start with quick introductions, then open the floor to anyone who wants to present something. There are usually around six 10-minute slots available, plus time for questions from the audience. First-timers are encouraged to share their work. Topics range from net art to computational design and interactive installations all the way to wearable electronics or generative poetry. If you’re wondering whether your own project might fit, take a look at the [Stammtisch archive](https://creativecodeberlin.github.io/Stammtisch/) to see what others have shared in the past. This event is *not* just for coders! New-media artists and anyone working with technology in their art are very welcome to share. If you enjoy art and/or technology, you’ll likely have a great time, and maybe even learn something new! BEGINNERS WELCOME! If you’re new to creative coding, you can find beginner-friendly resources at [creativecode.berlin/learn](https://creativecode.berlin/learn). THIS IS YOUR SPACE We do our best to create a welcoming environment for all people regardless of race, ethnicity, color, religion, gender identity, sexual orientation, national origin, age, disability, or genetics. People from group generally underrepresented in open-source, art, and technology fields are warmly encouraged to come by. And if you know someone who might enjoy this meetup but isn’t sure it’s for them, let them know they’ll be welcome! SAFE SPACE POLICY We support the Berlin Code of Conduct: [berlincodeofconduct.org](http://berlincodeofconduct.org/) Please read and make sure you agree with its content. ACCESSIBILITY Prachtsaal Studio is located on an easy to access ground floor. We're very sorry to say that the bathrooms are not wheelchair accessible yet. DO I NEED TO SPEAK GERMAN? We speak mostly English so international guests are more than welcome! Our team also speaks French, Italian, Spanish, Dutch, Finnish and German... though language availability may vary depending on which organizers are present :) CONTACT Raphaël de Courville team@creativecode.berlin +49 (0) 176 70070572 or get in touch via [creativecode.berlin](https://creativecode.berlin/) *** The featured artwork of the month is by https://www.instagram.com/ii_v.i We'd love to feature your work on the cover for the next Stammtisch! Please send an image at team@creativecode.berlin

Welcome to **Electric Social** \- Berlin’s electrifying arcade bar where nostalgia meets nightlife\! Think neon lights\, beers\, retro games\, and the unbeatable Sip Happens vibe you know and love\. Join us for a night of laughter, friendly competition, and laid-back fun as we take over one of Berlin’s coolest new spots. Whether you’re a Mario Kart master, a pinball wizard, or just here for the vibes, there’s something for everyone. 🎮 **What to expect:** ✨ A full bar with great drinks and booths to hang out in 🕹️ Classic arcade & video games to battle your new friends 🥂 The friendliest crowd in Berlin (that’s you lot!) 💬 Chill areas to chat, connect and hang out between rounds This isn’t your average night out — it’s a chance to play, laugh, and meet new people in a place built for fun. So grab your tokens, bring your A-game, and get ready for another unforgettable Sip Happens night! 📍 **Electric Social, Berlin** 🗓️ **Doors open at 20:00** 🎟️ RSVP now to secure your spot – it’s going to be *next-level fun!*

Ditch the old book club, where everyone has to read the same book...this is better! It works like this: Bring your own book. Come chat, have some tea or coffee, get to know your neighbors. Then we quietly read together, side by side, for about one hour, each one reading their own book, and afterwards we talk with each other about what we are reading. The usual agenda: - Arrival and introduction (~20 minutes) - ⁠Silent reading (~1 hour) - ⁠Discussion (~30-40 minutes) - ⁠Join us for a bite at a local restaurant afterwards, if you like! You may read in any language, you may read any book. We are a group of international residents of Berlin from many different countries, of all ages, and we converse in English. We welcome you! No registration needed – the event is donation based. All funds support the Offenes Wohnzimmer.

(Inside event) Are you learning a language but can't find people to practice with? Do you enjoy helping people speak your native language? If so, meet with us to make friends and have some good conversations. We begin by sharing the languages we speak fluently and the ones we are learning. Then we split into groups and speak! You can switch groups as often as you'd like. The goal is to speak about interesting, thought-provoking topics - not just the typical introductions we usually make. At our last meetups we spoke: German, Ukranian, English, French, Hebrew, Russian, Spanish, Italian, Portuguese, Hindi, Chinese, Greek, Japanese, Turkish, Polish, Swedish, Arabic, Norwegian, Icelandic, and Dutch. Can you help us make this list bigger? We hope to see you there and welcome ANY and ALL languages. (However, we cannot guarantee we will have a speaking partner for all languages). Looking forward to see you all! 😁

Come along, grab a coffee, shut up, and write! We will do at least two sessions of each 45 minutes of writing and two breaks. We will start the first writing session at 11:15. **For space reasons, we are limited to a certain number of attendees, so please update your RSVP if you can't come**. We often have a large waiting list, and not updating your RSVP or not showing up if you do RSVP yes means that others miss out. We also ask that if you do change your RSVP, do it with reasonable notice. Thanks! We typically take over all of the cafe, but try to share tables if you can to allow space for other customers. If you are new, come and say hello, as we know that suddenly going quiet for 45 minutes and staring at that blank page can be intimidating when it's your first time. We have a lot of long-term regulars who will be happy to help you feel welcome. In between sessions, we have a Telegram chat: https://t.me/joinchat/ERW3pxD5kfELGeWs9SUhjw For more information, visit [https://shutupwrite.com](https://shutupwrite.com/).

Central Ohio Radio Enthusiasts—CORE—is an informal community for anyone enthusiastic or curious about radio—whether you're new to radio and want to learn or you've been tinkering for years and want to share. Ham radio operators, GMRS users, Meshtastic fans, software-defined radio nerds, makers, and technical and non-technical folks are all welcome. No experience required or expected. This month we have **Radio Signal Analysis Using SDRs and OpenWebRX+** with **Scott McCrory**. Details are are [core.radio](https://core.radio/).

It feels like we just saw each other 🤷. Join members of the local design and UX community for our monthly breakfast. For May we’re stopping in for Rooh’s popup breakfast/cafe concept. You know someone is getting the lobster yuzu croissant, and that’s not even the prettiest thing on the menu!.

Tickets are now on sale!🥳We also will have lunch before. At the Rusty Bucket in Easton which is posted separately. 😊 Park in the East Garage.The restaurant is across the street then we can walk back together to the movie! 🥳

**Optional movie afterwards**

Bring your business cards and network in person with other business professionals! Gold Star Referral Clubs is one of the most established professional networking organizations in the country, with multiple groups in central Ohio. Join us!

Hello podcasters! We are rebooting the Columbus Podcasters User Group this May 11th! Come join us at the Roosevelt Coffee house in Lewis Center from 6-8pm. Help us organize future meetups! Thank you **Roosevelt Coffeehouse** and the **Olentangy Brewery** for hosting our meetup!