Web 2.0

**BitDevs Bitcoin Socratic Seminar Berlin @ c-base Raumstation** Join us for our monthly interactive **[Bitcoin Socratic Seminar](https://bitdevs.berlin)** in Berlin! We’ll start with pizza and beer (sponsored by [Ordimint.com](https://ordimint.com)), followed by deep-dive discussions on the most interesting *technical* developments in Bitcoin from the past month. Participation by everyone is highly encouraged! Our goal is to foster lively discussion, knowledge sharing, and debate. In the weeks leading up to the event, participants gather topics such as: * New research papers * New BIPs and BOLTs * Network statistics * Technical blog posts * Mailing list and Delving Bitcoin threads * Pull requests and updates from key repos (Bitcoin Core, LND, Core Lightning, Eclair, BDK, rust-bitcoin, LDK, Electrum, …) Each topic is briefly introduced by our moderators and then discussed before moving on. The full list of links will be published at [bitdevs.berlin](https://bitdevs.berlin) 1–2 days before the event — please review them in advance to get the most out of the discussion. **Important details:** * This event is highly technical — best suited for those with a solid grasp of Bitcoin internals. Curious newcomers are always very welcome, but expect in-depth conversations (see the former topics at [bitdevs.berlin](https://bitdevs.berlin)). * Chatham House Rule applies: you may share what was discussed, but not who said it. No livestream, no photos, no recordings. * The evening begins with food and networking; people often stay after the seminar to keep talking. **Co-hosted by:** * [Felix](https://x.com/FelixWeis) * [Freerk](https://x.com/freerko) * [Fabian](https://x.com/fjahr) For background on the idea of BitDevs Socratic Seminars, see [this article](https://bitcoinmagazine.com/articles/op-ed-want-to-learn-about-bitcoin-try-a-local-socratic-seminar).

Bist du bereit für einen Abend voller Geheimnisse, Täuschung und spannender Diskussionen? Am Mittwoch, den 22. April treffen wir uns zu einem neuen Mafia–Werwolf-Spielabend. Finde heraus, wer im Dorf die Wahrheit sagt – und wer heimlich zur Mafia oder zu den Werwölfen gehört. Ein Blick. Ein Verdacht. Eine Abstimmung. Und plötzlich ist jemand… raus. 📅 Datum: Mittwoch, 22.04 ⏰ Beginn: 18:00 Uhr 📍 Ort: Café Chagall 💰 Spende ab 5 € Egal ob Anfänger oder erfahrener Spieler – alle sind willkommen. Bring gerne Freunde mit und tauche ein in eine Nacht voller Intrigen, Strategie und Spaß. ‼️ Wichtiger Hinweis: Wir spielen die ursprüngliche Version von Werwolf/Mafia

Hello Gophers, Welcome back for another year of Go talks and networking! Would your company like to host our meetup? Let us know! If you'd like to give a talk - submit your proposals here: http://goo.gl/forms/54YvJT223F All talk formats work: short talks (5-10 min) as well as regular length (25 min). If you have more ideas - talk to us at the Gophers slack: https://invite.slack.gobridge.org/ in the #berlin channel, and follow us on twitter: https://twitter.com/gdgberlingo **Speakers**: *Simon Schulte* is a Tech Lead with nearly a decade of experience building scalable backend systems across fast-paced product companies. With a background in business informatics and a passion for Golang, cloud infrastructure, and DevOps, he has spent his career solving complex engineering challenges. He is particularly excited about leveraging AI and LLM workflows to eliminate the tedious, repetitive work that slows developers down — think tech debt, boilerplate, and documentation — so engineers can spend their energy on what actually moves the needle. For Simon, AI isn't about replacing developers; it's about giving them back their time. *Daniel Peralta Madriz* is a backend engineer from Costa Rica with around 6 years of experience working with Golang, although, sadly, he's been spending most of his time lately working with Node.js :(. He is interested in distributed systems, scalability, and developer experience, and is currently experimenting with how to leverage LLMs to safely and autonomously execute repetitive tasks. *Michael Morgen* is a Platform/infra engineer by day, runtime and network optimizations by night. Join in person at: **Talon.One** Talon.One is the incentives engine behind 300 of the world’s most-loved brands, unifying loyalty and promotions on a single flexible platform. Their customers run millions of real-time incentive decisions across markets, channels, and use [cases.As](http://cases.as/) incentives become more strategic than ever, they are continuing to raise the bar for what businesses can build and how fast they can build it Wiener Str. 10, 10999 Berlin https://maps.app.goo.gl/8eMjgWes1E4TBA3c7 or virtually at: https://www.youtube.com/live/qh__TQ1bMF0?is=hw21pk0ZE3HGyaaT *** Agenda 10:49 PM: Networking Networking over drinks and food 7:30 PM: Welcome Welcome words from the organizers 7:35 PM: Talk 1: Go-ing Against the Chaos: Deterministic LLM Workflows / Daniel Peralta Madriz (Backend developer) & Simon Schulte (Techlead of Webhooks and Notifications) @ Talon.One LLMs are powerful, but “it works most of the time” isn’t good enough for production. In this talk, we’ll walk through how to design deterministic workflows around non-deterministic models using Go. From structured iteration loops to validation steps and guardrails, you’ll learn how to move beyond prompting and start engineering reliable LLM-powered systems 8:10 PM: Announcements and break Announcements, HR lost & found, open mic 8:30 PM: Talk 2: About Go Memory Allocator / Michael Morgen, Platform/infra engineer @ Mirantis A short talk about how Go gives memory to your program. We will look at the main allocator parts, why small allocations are usually fast, when Go asks the OS for more memory, and a couple of simple examples where this knowledge helps performance. 9:05 PM: Networking Networking over drinks and food *** Hosted By Natalie Pistunovich, Organizer Ole Bulbuk, Organizer Tim Scheuermann, Organizer Anderson Queiroz, Organizer Complete your event RSVP here: https://gdg.community.dev/events/details/google-gdg-berlin-golang-presents-hybrid-may-golang-meetup-1/.

Bist du bereit für einen Abend voller Geheimnisse, Täuschung und spannender Diskussionen? Am Mittwoch, den 22. April treffen wir uns zu einem neuen Mafia–Werwolf-Spielabend. Finde heraus, wer im Dorf die Wahrheit sagt – und wer heimlich zur Mafia oder zu den Werwölfen gehört. Ein Blick. Ein Verdacht. Eine Abstimmung. Und plötzlich ist jemand… raus. 📅 Datum: Mittwoch, 22.04 ⏰ Beginn: 18:00 Uhr 📍 Ort: Café Chagall 💰 Spende ab 5 € Egal ob Anfänger oder erfahrener Spieler – alle sind willkommen. Bring gerne Freunde mit und tauche ein in eine Nacht voller Intrigen, Strategie und Spaß. ‼️ Wichtiger Hinweis: Wir spielen die ursprüngliche Version von Werwolf/Mafia

**Berlin can be a tough nut to crack.** Sometimes you have your "one person" and you’re stuck in a bubble; other times, you’re the new kid on the block looking for your crew. This night is designed to break those bubbles and bridge the gap. "Bringing a friend? **Amazing.** Coming solo? **Also great.** \> Whether you’re rolling with your crew or flying solo\, you’re in the right place\. Our mission is to help you meet like-minded people and turn 'strangers' into 'Berlin besties.' **Friendly reminder**. Change ur attendance status if you cannot attend!

An International Event for everyone around the world looking at starting an online business to create a reliable side income or future-proof existing earnings ⚠️ **Important:** You must click the registration link in advance — selecting “Attend” on Meetup alone will NOT give you access. ***Click here > https://www.podlaunchpro.com/webinar*** to register in advance of the workshop start. *Please note : The zoom link allows you to register in advance and the workshop zoom link is emailed to you. Please join the event a few minutes before it starts.* Want to start an online income stream — without stock, design skills, or big upfront costs? Print-on-demand has become one of the simplest ways to launch an online business — and with AI, it’s now faster and more accessible than ever. In this live session, you’ll see how ordinary people are creating and selling products online using simple tools and proven methods — without needing to be technical or creative. \*\*\* \#\# 👀 What you’ll learn • How AI can help you create designs and product listings • How to find niches and keywords people are already buying • Why Etsy remains one of the easiest places to start • The exact steps to go from idea to live online store No fluff. No theory. Just a clear, practical walkthrough of how this works today. **\*\*\*** **About your host** Led by Nigel Wymer — a print-on-demand mentor with 16+ years in e-commerce and a proven track record selling on Etsy. Featured on Can You Make £10K in 10 Days?, where print-on-demand was selected as one of the simplest business models to get started. \*\*\* **Who this is for** • Complete beginners exploring online income • Anyone looking for a flexible side hustle • Existing sellers wanting to simplify and scale with AI No experience needed — everything is explained step by step. ⚠️ **Important:** You must click the registration link in advance — selecting “Attend” on Meetup alone will NOT give you access. ***Click here > https://www.podlaunchpro.com/webinar*** *Please note : The zoom link allows you to register in advance and the workshop zoom link is emailed to you. Please join the event a few minutes before it starts.* The Adapt and Thrive Events Group wholeheartedly supports the policies and principles of Meetup. We make no guarantees and we do not offer financial services or assurances. All our Meetup Events are FREE to attend.

In the spirit of a 19th-century salon, this gathering will be a space for lively conversations, fascinating encounters, and the exchange of ideas over drinks. Whether you’re new in town or a local looking to expand your social circle, this is the perfect opportunity to connect with like-minded explorers of Berlin’s nightlife. Each week, we shine a spotlight on a **special guest** from our community — someone who brings along a topic they’re passionate about or deeply engaged with. It’s not a presentation or a performance, but rather a gentle invitation into conversation: a starting point for curiosity, questions, and unexpected connections. The topic can naturally weave its way into the evening, without needing to take over. If you’d like to be our next special guest, feel free to reach out via the contact form: [https://socialbutterfly.berlin/contact/](https://socialbutterfly.berlin/contact/) This time, we’re excited to introduce **Erik**, who’s been thinking about how we meet new people in a digital world. Erik has been developing his own app, inspired by the idea of making spontaneous, local gatherings more visible — and connecting with what’s happening around us in the moment. How do you usually meet new people — and what makes you stay in touch? 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/)

**Wichtiges Update für unser Sprachcafé in Manifesto ab Donnerstag!** 📢 ​Wir dürfen oben bleiben – das ist viel ruhiger. ​Damit das klappt, ist die einzige Bedingung: **Bitte kauft euch** eine Kleinigkeit (Getränk oder Snack) bei der Soot Bar (unten bei den WCs). Das ist unser „Eintritt“ für den exklusiven Platz oben. Danke fürs Mitmachen! 😊

Bist du bereit für einen Abend voller Geheimnisse, Täuschung und spannender Diskussionen? Am Mittwoch, den 22. April treffen wir uns zu einem neuen Mafia–Werwolf-Spielabend. Finde heraus, wer im Dorf die Wahrheit sagt – und wer heimlich zur Mafia oder zu den Werwölfen gehört. Ein Blick. Ein Verdacht. Eine Abstimmung. Und plötzlich ist jemand… raus. 📅 Datum: Mittwoch, 22.04 ⏰ Beginn: 18:00 Uhr 📍 Ort: Café Chagall 💰 Spende ab 5 € Egal ob Anfänger oder erfahrener Spieler – alle sind willkommen. Bring gerne Freunde mit und tauche ein in eine Nacht voller Intrigen, Strategie und Spaß. ‼️ Wichtiger Hinweis: Wir spielen die ursprüngliche Version von Werwolf/Mafia

Welcome to our cosy Godot Engine Community Meetup A Maze Edition! This is not a structured meeting, but rather a friendly get-together. We will hang out, chat and maybe show some of our current projects! 🦜 This is an open event and we will hang out at c-base afterwards, so it is fine to come late. Regardless if you are an artist, designer, programmer, beginner, hobbyist, professional or anything in between: join us for sharing knowledge, creating art together, coding together, joining game jams together and having fun! 🌼 This meetup will happen at [c-base](https://c-base.org), Rungestraße 20, 10179 Berlin. 🛰️ You can also join us on [our Discord Server](https://discord.gg/Sm3CgrqqQa). ☎️ Follow us on [Mastodon](https://mastodon.gamedev.place/@GodotUserGroupBerlin) for updates. 📢 Also check out [our website](https://godot.berlin). 🌐 Please be [excellent to each other](https://godotengine.org/code-of-conduct/)! 🕊️

**Online-Nähabend auf Discord – gemeinsam nähen, austauschen und helfen** Hast du Lust auf einen entspannten Online-Nähabend – ganz ohne Kursdruck? Wir treffen uns auf Discord, um gemeinsam zu nähen, zu plaudern und uns gegenseitig zu helfen. Egal ob Anfängerin, Anfänger oder schon fortgeschritten: Alle sind willkommen. Bring einfach dein aktuelles Projekt mit, stelle Fragen oder teile deine Tipps mit der Runde. **Deinen Arbeitsplatz zeigen – optional** Wenn du möchtest, kannst du deinen Arbeitsplatz live zeigen, zum Beispiel über: * Kamera auf Discord (Webcam oder Handy) * Bildschirmfreigabe für Schnittmuster oder Anleitungen am PC * Handy als Kamera von oben auf deinen Tisch **Ablauf des Abends** Ganz locker und ohne festes Ende: * **20:00 Uhr** – Ankommen und kurzer Technik-Check (Ton, Bild, Bildschirmfreigabe) * Kurze Vorstellungsrunde: Woran arbeitest du gerade? Wo brauchst du vielleicht Hilfe? * Danach freies Nähen, Austausch und Fragen zwischendurch * Offenes Ende – wenn du müde wirst, kannst du einfach gehen **Wichtig** Wir starten pünktlich um **20:00 Uhr**. Wer später dazukommt, ist natürlich trotzdem willkommen. Nach dem Start läuft der Abend aber eher frei, deshalb können wir Spätankommende nicht mehr so gut in einen festen Ablauf einbinden. **Technik-Hinweise** * Wir treffen uns in einem Discord-Sprachkanal, auf Wunsch auch mit Video * Wenn du deinen Arbeitsplatz zeigen möchtest, funktioniert die Kombination aus Handy und Laptop meist am besten * Bitte schalte eines der Mikrofone stumm, damit es kein Echo gibt * Kopfhörer sind empfehlenswert * Bildschirmfreigabe klappt meistens am besten in der Discord-Desktop-App, im Browser kann es Einschränkungen geben. **Zeit** **Donnerstag, 20:00 Uhr** **Discord-Zugang** Den Discord-Link bzw. die Kanalinfos poste ich kurz vor Beginn direkt im Event. Er ist für angemeldete Teilnehmende sichtbar.

Join this Professional Communication session — to sharpen the skills for architectural pitches, elevator pitches, interviews. This time we meet in the Monbijou park. 💡 How it works The event is split into two parts: 1. **Communication (10 minute rounds)** – One participant answers a round of design and behavioral questions. Each other participant gets to ask him one question. 2. **Feedback Round** – The group provides feedback on communication, structure, and clarity. Constructive criticism is encouraged. 💡You will be asked: * **Light design problems** (high-level reasoning, not code) * **Behavioral questions** (“Tell me about yourself”, “Describe a challenge you faced...”) No need to prepare anything in advance — just bring curiosity and an open mind. 💡Note: location is the entrance to Monbijou park

🤝 **Co-Founder Matching** ​Finding the right co-founder can change everything. ​Join us for an interactive networking session designed to connect founders, aspiring entrepreneurs, developers, creatives, and people looking to build something together. ​Whether you already have an idea and are searching for the right person to join you, or you’re looking to become part of a startup journey, this event is the perfect opportunity to meet like-minded people and explore potential collaborations. ​Through guided networking and open conversations, participants will have the chance to introduce themselves, share their interests and skills, and connect with others who complement their vision. *** # ​💡 What to Expect ​• Founder introductions • Guided networking • Conversations around ideas, skills, and goals • Meeting people with complementary strengths • Opportunities for future collaboration *** # ​🎯 Who Should Join ​• Founders looking for a co-founder • Developers & designers • Marketing & business enthusiasts • Aspiring entrepreneurs • Anyone interested in joining a startup journey *** # ​📅 Event Details ​📅 **May 16, 2026** ⏰ **13:00 – 15:30** 📍 **The Social Hub** 🤝 Join Our WhatsApp Community For updates about upcoming events, networking opportunities, and founder meetups, join our **WhatsApp community** where entrepreneurs support, connect, and grow together. 👇 [https://chat.whatsapp.com/JmibzpAnl5e058fSBIlgpL](https://chat.whatsapp.com/JmibzpAnl5e058fSBIlgpL?utm_source=luma)

\*\*\*\*\*\* ***For address and more details see the website www.pausify.org*** \*\*\*\*\*\* **Event Info:** Pausify is the **biggest community and most active** of book lovers and creatives in Berlin. Impressions: Instagram: **[@Pausify (Co-Reading Space)](https://www.instagram.com/pausify_org/)** Events happen every Sat and Sun at 11 AM. Bring along your **current book to read** (or something **creative** to work on) and join us for this mix of a shared focus time + discussion. \- 11:00\-11:30 \- Meet & greet \- 11:30\-12:30 \- Silent focus time \- 12:30 \- Discussion of books/ projects over coffee Afterwards, join for lunch if you'd like (optional). **Drinks & snacks are included** ☕️ * **To reserve your place, a ticket (€9,90/event) or a community pass (only €17,90/MONTH) [from the website ](https://pausify.org/)*www.pausify.org* is required** * **Attendance here doesn’t show all sign-ups from other platforms. We usually have about 50 to 100 people at each event.** ***FAQ: Why does it cost money if I bring my own project?*** Because we rent a beautiful, central space for every event. Ever thought your monthly apartment rent was too high? Well, multiply that – that’s what commercial spaces in big cities like Berlin cost *per hour*. Of course, if all you want is just some quiet time, your home or a library is perfect. But if you’d like to focus & connect with others in an inspiring space – with drinks, snacks included – that’s what your ticket helps to cover. See pics from our events below - and on our Instagram: **[@Pausify (Co-Reading Space)](https://www.instagram.com/pausify_org/) ☕️** **[Pausify Co-Reading Space Website](https://pausify.org/) www.pausify.org** For questions, please contact us over [Website ](https://pausify.org/) www.pausify.org as this platform can have issues. Thank you! *Please note that photos and videos may be taken during the event and used for promotional purposes to highlight and share the experiences at our events. If you have concerns, don't hesitate to approach the event organizers before the event.*

Columbus Code & Coffee is an inclusive, informal co-working session. People of all skill levels attend, and we love it that way. Many people (optionally) bring projects to work on, and many other people (optionally) socialize the entire time. It's entirely up to you! **What to Expect at the Intro Circle** \~\~\~\~\~\~\~\~\~\~\~\~\~ Near the beginning of the event (1:30 pm), we do a standup: * Organizer announcements, updates, and logistics Round 1 - (7 secs max): * Your name * What you're working on * What you can help others with Round 2: * Community events you wanna plug. If none, that's cool too. Round 3: * Job opportunities you're hiring for OR announce that you are looking for one. If none, that's cool. After the introduction circle, everything is self-organized! Feel free to work alone, pair up, attend one of our workshops/presentations, or mingle!

**TBA**

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

**PLEASE READ THE FOLLOWING IMPORTANT NOTES:** 1. The dates listed for this series are about 95% reliable. We are finalizing our 2026 schedule, so minor adjustments are still underway. 2. Each class in this series has an attendance fee, on a first-come, first-served basis. 3. Each class, from BOTH a sign-up and fee perspective, is a separate entity. **Introduction:** **The breakdown of the six-class series is as follows:** **Class 1: TBD** **Class 2: TBD** **Class 3: TBD** **Class 4: TBD** **Class 5: TBD** **Class 6: TBD**

**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** TBD **YouTube Link** TBD

**PLEASE READ THE FOLLOWING IMPORTANT NOTES:** 1. The dates listed for this series are about 95% reliable. We are finalizing our 2026 schedule, so minor adjustments are still underway. 2. Each class in this series has an attendance fee, on a first-come, first-served basis. 3. Each class, from BOTH a sign-up and fee perspective, is a separate entity. **Introduction:** **The breakdown of the six-class series is as follows:** **Class 1: TBD** **Class 2: TBD** **Class 3: TBD** **Class 4: TBD** **Class 5: TBD** **Class 6: TBD**

**Total Eclipse of the Chart: School Redistricting Dashboards** In this presentation, we will explore the utilization of maps, sets, and SQL within a Tableau dashboard to help provide “what-if” analyses generated through the use of a mapped dashboard, providing different scenarios and the potential implications of these. While in this use case we are focused on a large school district, the concepts of utilizing existing data to explore the future impacts of modifying different geographic boundaries can be useful to many industries, balancing the mix of maps with visual analytics. **About Our Speaker** Robert Kramer is the Data Systems and State Reporting Coordinator at South Western City Schools in Grove City. He has worked there for 17 years, serving previously in the roles of Data Analyst, Programmer, and Operations Coordinator. Prior to working at South Western, he worked as a Systems Engineer at Pinnacle Data Systems in Groveport. He graduated in 2005 from The University of Toledo with his Bachelor’s in Computer Science and Engineering, and a minor in Mathematics. Robert resides in Obetz with his wife, and their 15 and 12 year-old daughters. He was also just elected to his 3rd four-year term on the Obetz City Council. 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)