Scientific Computing

We are happy to invite you to our next iOS meetup. This time we cooperate with the amazing 42 Berlin to share the knowledge and experience in iOS development. 18:00 Doors open 18:30 Welcome on campus **18:45** **— Sebastian Hagedorn, director of Engineering at Clue, presents "The Sensitive App".** Is your app really working, or just not crashing? “The Sensitive App” reports subtle bugs regardless of origin, and validates your assumptions in production so you don’t have to resort to guessing or praying. Learn how to turn your app into the first line of defense for your entire system’s health! **19:45** **— Dmitry Kurkin, lead Mobile Engineer at SuperNext, presents "Lessons that iOS Native Project could learn from ReactNative in agentic development".** We'll inspect the components of the React Native engine that provide faster feedback and boost agentic iterations.

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

Join us for the first meetup 100% dedicated to agentic analytics in Berlin. **The goal:** share real-world feedback between data teams on implementing analytics agents. **The format:** a roundtable with 4 data teams who have tested or deployed analytics agents using different solutions - Cortex, Dust, Hex, nao, Omni, Looker, or in-house tools. **[RSVP on Luma.](https://luma.com/ly17mjtj)** 📣 **Speakers of the night:** * [Marina Ariamnova](https://www.linkedin.com/in/marina-ariamnova/?utm_source=luma), Analytics Manager at SumUp - LangChain vs Dust * [Andrey Pushvintsev](https://www.linkedin.com/in/pushvintsev/?utm_source=luma), Staff Analyst at Miro - Claude + custom BI MCP * [Marielle Dado](https://www.linkedin.com/in/marielledado/?utm_source=luma), Senior Analytics Engineer at CarOnSale - Dataleap, Langdock, Claude + Snowflake Cortex MCP vs Secoda AI * [Andre Wagner](https://www.linkedin.com/in/andre-wagner/?utm_source=luma), Director of Data Analytics at Taxfix - Claude + custom plugin vs Looker The panel will be moderated by [Christophe Blefari](https://www.linkedin.com/in/christopheblefari/?utm_source=luma), founder of [nao Labs](https://getnao.io/?utm_source=luma). **Agenda** 6:30 PM: Doors open 7:00-8:00 PM: Roundtable 8:00-10:00 PM: Drinks and Networking **About our sponsor:** [nao Labs](https://getnao.io/?utm_source=luma) helps teams build and operate AI coworkers for analytics and operations. Their platform focuses on practical, production-ready agent workflows so companies can turn LLM capabilities into measurable business outcomes. **About our host:** [Trawa](https://trawa.energy/?utm_source=luma) is a Berlin-based energy platform helping businesses access cleaner and more cost-efficient electricity. By combining software, data, and energy market expertise, trawa enables companies to optimize procurement and better manage energy costs. Want updates or more info? Subscribe to our newsletter: [databerlin.substack.com](https://databerlin.substack.com) Follow us on LinkedIn: [Data Berlin on LinkedIn](https://www.linkedin.com/company/data-berlin/?utm_source=luma) Looking for a job? [databerlin.net/jobs](https://databerlin.net/jobs) Join our Slack community: [Data Berlin Slack](https://join.slack.com/t/databerlin/shared_invite/zt-2q6j9x0z8-~sG7o3Q8S2j4j5gXg2yHlw)

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

The longest day of the year is comming and let's another Kotlin meetup. This time we geather at N26! **⚠️⚠️⚠️ Due to a venue policy please submit the following form for additional details. Without it, you won't be allowed inside the venue:** https://forms.gle/XjqVXkD3FARCM6jA8 **Line-Up:** 👉 **TestBalloon: Kotlin testing is easier (and more fun) than you think** *by Oliver Okrongli* You want an easier way to write tests? Parameterize tests in plain Kotlin? Reuse a series of tests? Easily extend own your test setup? Have first-class support on all platforms? All without struggling with a huge framework API? TestBalloon is a new test framework that brings the power of Kotlin to your test setup. With a small-surface API, a hierarchical test structure and an extensible DSL, TestBalloon makes Kotlin testing easy, even at scale. Oliver, the author of TestBalloon, will show testing patterns and strategies and lots of practical examples, ranging from simple unit tests with less boilerplate to advanced testing with coroutines and generated data. This talk is based on insights first presented at KotlinConf 2026 in Munich. At the end of this talk, you’ll be able to firmly the answer the question: "How can I master Kotlin testing with ease, and make my team release with joy and confidence, every time?" 👉 **One Topic to Rule 'Em All** *by Yonatan Karp-Rudin* Kafka delivered every event exactly once, in order, and lost nothing. So what broke? This talk follows that question into the gap most event-driven systems leave open: what actually guarantees the order your domain depends on, and what quietly doesn't. We start from a real log line, find the crack in an architecture that looks clean and ships fast, and rule out the fix everyone reaches for first. The cure turns out to be one sentence of domain thinking plus one line of config, though the Schema Registry will fight you on the way there. A live demo runs the bug and the fix back to back: same load, same hero, one change. If you build with Kafka, you have probably shipped a version of this bug. You will leave able to spot it and fix it before it pages someone. 👉 **TBD** **Speaker Bios:** 🗣 Oliver Okrongli Oliver has been shaping and creating software from backend to frontends. He is the author of TestBalloon, a next-generation Kotlin test framework. Before, he has helped to maintain Kotest, and contributed to several libraries of the Kotlin ecosystem as well as the Kotlin compiler. Can be found on GitHub (OliverO2) and the kotlinlang Slack (Oliver O). When not developing, he is most probably in deep talks, dancing, snowboarding or F18 catamaran sailing whenever he gets a chance. 🗣 Yonatan Karp-Rudin Yonatan Karp-Rudin is a Staff Engineer at Billie, building event-driven systems in Kotlin and Spring Boot. Off the clock, he plays with AI agents and builds random tooling, trying to hand off as much of his own workflow to a machine as he can. The rest of the time he's brewing mead or deep in a video game. **🗣 TBD**

In Bad Company is a one-hour stand-up show hosted by Sepideh Kaav, featuring 2–3 of Berlin’s best comedians at one of Mitte’s coolest bars, HIER WO DU STRAHLST. Expect a night of great comedy, terrible decisions, and the kind of socializing where by the end of the night we all somehow know each other a little too well. No topic is off limits. No one is fully safe. Come with friends, come with a date, come alone, honestly, especially come alone, maybe you meet your future best friend or soulmate here. 🍸 HIER WO DU STRAHLST 📅 Thursday 8:30 PM (CEST) Doors: 20:30 Show: 21:00 to 22:00

## A space where creativity flows, conversations open & ideas come to life. Relax after work and step into a chill, social atmosphere designed for drawing, painting & connecting. Whether You know it as *Drink & Draw*, *Sip & Paint*, or *Wine & Paint*, this experience brings together the best of art, people & good energy — all in one place. Our sessions are perfect for all levels — whether You’re picking up a brush for the first time or already feel at home in art. With easy and encouraging guidance from our Creative Teachers, You’ll create Your own artwork using pencils, acrylic paints and/or oil pastels, while enjoying a laid-back & inspiring environment. Whether You’re coming with colleagues, meeting friends, planning a date, or simply taking a moment for Yourself after a long day — this is Your space to relax, connect &express Your creativity. ‍ > Each session offers a new theme, fresh inspiration &the chance to take home something You created Yourself. ‍ ##### **INCLUDES:** **‍**All Materials (canvas, pencils, acrylic paints, oil pastels, brushes & more) + 2 glasses of wine / cocktail (2 × 200 ml) or 2 Soft Drinks & Water ‍ ##### **SIGN UP & TICKETS:** **‍**No registration needed. Simply come by & get Your ticket at the box office before the class. ‍ LEVEL: All levels WHAT YOU NEED: All materials provided (canvas, acrylic paints, oil pastels, brushes & more) COSTS€28 General \| €5 for DNA\. Members See You Soon :) Love. DNA.

**You complain — we entertain!** **An hour long chill-but-fun showcase where comedians turn your anonymous problems into punchy on-stage therapy** Write down anything you want - from dating disasters to existential crisis & watch comedians solve it in the craziest way possible. ❗️**You stay anonymous, and we won't talk to you unless you want us to!** Perfect for introverts, overthinkers, and anyone who needs a laugh **Doors 20:00 \| Show 20:30** * Stand-up comedy + live "therapy" * Different lineup + new problems every show Every show is a fresh combo of stand-up brought by the guest comedian and advice from the host **Lena Stolby** — she's Russian, so she really knows about problems! & **THIS IS A PAID WHAT YOU CAN EVENT** We have been running solely thanks tolthe support of the audience. **Suggested contribution: €15** standard / **€12** reduced (student, unemployed)

ComedyShorts Berlin is a fast-paced competitive improv comedy-match played like a sporting event. Two teams go head-to-head in a playful, highly interactive battle-of-wits where the audience yells out suggestions all night and votes for which team brings on the ‘funny.’ The group performs in English, and established itself as the the first English-speaking improv group in Berlin since its premiere in 2005. Tickets are only 12 eu sold through YesTicket, at 14 eu at the door. Ticket link: [https://www.yesticket.org/e/UXZKPtWYB2](https://www.yesticket.org/e/UXZKPtWYB2)

The Creative Code Jam is a monthly gathering of artists, makers, designers, illustrators, coders, musicians, 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. The jam is an opportunity to meet likeminded people and get creative together in a relaxed and safe environment. Beginners and first-timers should feel especially welcome! WHAT SHOULD I EXPECT? **Bring a laptop** and/or anything you’d like to work on, whether it’s a personal project, an experiment, or a skill you want to learn. You can come with friends or meet new people here. There’s no set agenda: some people code, some sketch ideas, some collaborate, and others just chat and get inspired. SCHEDULE Doors open at noon, then we’ll have quick introductions so everyone can share what they’re planning to work on. Note: arriving on time is the best way to hear what others are up to ;) Around 6 pm, we gather to share what we’ve worked on during the day. BEGINNERS WELCOME! If you’re new to creative coding, we'll be happy to help you get started, and you can find beginner-friendly resources at [creativecode.berlin/learn](http://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: https://berlincodeofconduct.org/ Please make sure you agree with its content. ABOUT MotionLab.Berlin MotionLab.Berlin is Germany’s premier Innovation Hub & Makerspace – an ecosystem for Hardtech, art, creativity, and entrepreneurship. They are an international community with access to state-of-the-art machinery, prototyping machines, coworking spaces, offices, and production facilities. More info: https://motionlab.berlin/ ACCESSIBILITY MotionLab is located on the ground floor, with bathrooms on that same level, although unfortunately they are too small for wheelchairs. FOOD MotionLab has drinks and snacks for sale. Bio food can be found on LPG at Bouchéstr (\~200m). Their cantine has vegan, vegetarian and other food options until 8pm. DO I NEED TO SPEAK GERMAN? We speak mostly English so international guests are more than welcome! Our team also speaks French, Turkish, Italian, Spanish, Dutch, Finnish and German... though language availability may vary depending on which organizers are present :) CONTACT Raphaël de Courville team@creativecode.berlin +49 176 700 70572 or get in touch via [creativecode.berlin](https://creativecode.berlin/)

At OpenSpace Networthing entrepreneurs from diverse disciplines, industries and nations meet to collaboratively develop solutions for challenges presented by participants. This month we will dive deeper into building digital products with Vibe Coding & AI with Varun Jain. We are building a networking-App: The "Tinder for Entrepreneurs" If you want to offer a workshop or present a topic for our members, write an email to alejandro.wagner@mlp.de Entrance is free! Bring in your expertise instead.

Join Us for a Morning Swim at Humboldthain Outdoor Pool! Hey everyone, We are doing another relaxed swim meet-up at Humboldthain outdoor swimming pool, and I'd love for you to join! We'll be gathering for a casual 30-minute swim - nothing competitive, just a chance to enjoy the water and start the day on a refreshing note. Afterwards, if you're up for it, we can go to a nearby cafe for a coffee and chat, but no pressure - totally optional! 📝 **Bring** - ID/passport (mandatory, checked by the pool staff) !!! - swimsuit - towel - 1 Euro coin (for a locker) - ticket is around €5.50 (buy online or at the pool) **RSVP** Please un-RSVP ❌ if you cannot come! Otherwise we would unnecessarily wait for people to never show up. 📍**Where** At the pool entrance (see the map pin) and wait for 15 min for people to gather. You need to enter Humboldthain park. 🎟 **Pool tickets** [https://www.berlinerbaeder.de/baeder/detail/sommerbad-humboldthain/](https://www.berlinerbaeder.de/baeder/detail/sommerbad-humboldthain/) ☕ **Coffee** A wonderful coffee shop a few minutes away from the pool [https://maps.app.goo.gl/os3WHTSfYzbDyKQh7?g_st=ac](https://maps.app.goo.gl/os3WHTSfYzbDyKQh7?g_st=ac) Looking forward to seeing you there!

This is a **shuffle/cutting shapes** class for **beginner** and **intermediate** shufflers where we'll be learning a **fun and melodic choreo**. We will practice the choreo to various speed, so that both beginner and intermediate (or even advanced!) dancers have the chance to practice at their level. **What you need to bring with you:** **Shoes**: Zou can shuffle in socks, but for a better experience please bring a pair of dedicated clean athletic shoes with white soles - then you can choose how you prefer to shuffle. **Water**: because Shuffling is like an intense cardio workout :) **Fee**: 10€ (in cash or paypal **after** the event) to cover the cost of the rent. Teacher: Ina P.S. You're welcome to join our Telegram group where we share choreos, combos, music, etc. https://t.me/joinchat/73TM5UceauA5YmQy P.P.S. Classes at Milastr. 4 take place every Friday! Two times a month they're done by me and two times - by Ella, who has a completely different teaching style. I suggest you try both to get the best of the two teaching styles!

Meet, Match, MoveOn and Manage or Master Why Meet 1)Meet new People Culture Languages. 2)Not Match Romance, Political Views nor Religion, only Respect and Joy 3) Moveon, advance with your level, goals, and especially share and try Rotate the groups and let others participate a bit. 4) Master the challenges, and Manage to give a Like or appreciate the meetups!! **Thematic** or small Concept: Manage to Bring 2 German Friends and you get a Drink. if you bring your Ex Partner + 2 German friends =2 drinks = thats the Challenge and the Attitude of 2026

We are bringing Microsoft Build sessions to Columbus Ohio! The Central Ohio Azure Meetup and Central Ohio .NET Developer's Group (CONDG) are coming together to bring some of the labs and breakouts from Microsoft Build to your backyard. In this free, 1 day event, you are going to Build stuff with us! And yes, there will be free food. Please RSVP via [Microsoft Build //localhost:columbus | Microsoft Reactor](https://developer.microsoft.com/en-us/reactor/events/27247/).

**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** *Customize the IDE: Building Extensions for Visual Studio Code* Visual Studio Code is one of the most widely used development environments today, and much of its flexibility comes from its extension ecosystem. Extensions allow developers to customize the editor with new features, integrations, and workflow improvements tailored to their needs. In this session, we’ll cover what extensions are and the different types available, including full extensions written in TypeScript or JavaScript, along with lighter-weight extensions such as color themes, language packs, language support, code snippets, and keymaps. We’ll also look at practical reasons a developer might create an extension, from automating repetitive tasks to adding custom tooling. The session includes a hands-on walkthrough of creating a new extension, testing it locally, and understanding the basic project structure. We’ll close with a brief overview of how extensions are packaged and published to the Visual Studio Marketplace and other distribution options. **YouTube Link** TBD

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month Chris Pazsint will be talking about Agentic Coding. How does one use CLI Based Agents, and Agentic IDEs such as Cursor, Kiro, Antigravity? How to include agentic coding plugins for IDEs you already love such as Visual Studio Code. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

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

* Who Can Attend \* The Central Ohio .Net Developers Group meetings are free and open to the public! All developers; professional, student, and hobbyist are welcome and encouraged to attend. * When we meet \* The Central Ohio .Net Developers Group meets on the 4th Thursday of every month. * Where we meet \* Please check our Meetup group link below for the latest location details! * Join our Meetup Group \* https://www.meetup.com/Central-Ohio-NET-Developers-Group-CONDG/

Welcome to Drunken Philosophy, a casual, curious, social discussion club. Come grab a drink and a seat at The Oracle. **Optional topic for this meetup: Where is everybody?** In 1950 the physicist Enrico Fermi was talking about aliens over lunch and asked a question that still has not gone away: if the universe is so vast and so old, and even a fraction of those billions of stars have planets, where is everyone? By the numbers the galaxy should be crowded with civilizations. Instead we look up and hear silence. That gap between "they should be everywhere" and "we see no one" is the Fermi Paradox. One of the most unsettling answers is the idea of a **Great Filter**: somewhere on the road from dead chemistry to a galaxy-spanning civilization, there is at least one step that is almost impossible to get past. Maybe the filter is behind us. Maybe life starting at all, or simple cells becoming complex, or intelligence ever evolving, is the freak accident, and we already cleared the hard part. Or maybe the filter is ahead of us, and advanced civilizations reliably wipe themselves out before they spread. Here is the part that messes with people. If we ever found life somewhere else, even pond scum on Mars, most people would call it the greatest discovery in history. But it might be the worst possible news. It would mean life is common, the early steps are easy, and the hard step is still in front of us. So the eerie silence overhead might actually be the best sign we could ask for. **Questions to wrestle with:** * Is it better to be alone? Would you rather we find alien life and learn we are not special, or find nothing and quietly improve our odds of surviving? * Where do you bet the filter sits, behind us or ahead of us, and why? * If it is ahead of us, what is it? Nuclear war, climate collapse, AI, something we cannot even picture yet? And can we do anything about a filter we cannot see coming? * Two principles pull opposite ways here. The principle of mediocrity (the Copernican principle, Sagan's "no privileged place in the universe") says we are ordinary, so what happened on Earth probably happened everywhere, which makes the silence scream louder. The anthropic principle says of course we find ourselves somewhere life was possible, since we could not observe anything else, so our being here may say almost nothing about how common life is. Which lens do you trust, and does the silence still demand an answer once you account for observer selection? * And if we did confirm life out there and had to accept we are not special, what would that do to belief in a higher power, and would shedding (or keeping) that belief help or hurt our odds of pulling together as one species? * Does any of this change how you live, or how humanity should be spending its time and money right now? As always the prompt is optional. Come for the conversation, stay for the drinks, and bring your own questions.

Most people still use AI like a search box: type one question, get one answer, repeat. But the next step is AI agents: systems that can take a goal, break it into steps, use tools, remember context, and produce useful work for a human to review. In this beginner-friendly session, we’ll demystify what AI agents actually are — without hype or jargon. We’ll walk through practical examples of how agents can help with research, planning, writing, coding, operations, and personal productivity. We’ll cover: * What makes an AI “agent” instead of just a chatbot * How agents break tasks into steps * Where agents are genuinely useful today * Where they fail, hallucinate, or need human review * How to design simple AI workflows for your own work * A live demo of an AI agent-style workflow from start to finish No coding experience required. This is for anyone who wants to understand where AI tools are going and how to use them more effectively right now. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.