Ruby On Rails

👋 Hallo und 💜-lich Willkommen to the Elixir Berlin Meetup. Due to the easter holidays, we moved to the third Thursday of the April for some sweet Elixir. If you're new to the community the best way to introduce yourself is [to submit a talk](https://github.com/elixir-berlin/planning/issues/new?template=talk.yml) ⏰ Schedule 18:45: Doors open 19:05: Welcome & Announcements 19:15: 🗣 Surveyor - Extracting Specifications from Legacy Software with Elixir by Chris 19:45: 🍺 break 🍵🧃 20:15: 🗣 Talk about the SSH OTP application by Cara 20:45: ⚡️ Lightning talks and Socializing 🪩 We want to encourage members of the Elixir community to share what they're working on. If you want to give a lightning talk at this Meetup, contact one of the organizers with a short description of your talk - or [submit a talk](https://github.com/elixir-berlin/planning/issues/new?template=talk.yml) See you all there 💜💜💜

**Welcome to Berlin's international training community! 🎾** **We offer professional training throughout the season, whether you're new to tennis and looking for a great start or a seasoned player seeking to enhance your skills. Our training programme features flexible booking sessions that mix learning with competition.** **Our aim is to equip players for the game whether you're playing for fun or aiming for Grand Slam success 😎**

Register: [https://luma.com/rjekky53](https://luma.com/rjekky53) Join us for a **hands-on introduction to Generative AI with Neo4j** with CODE University. ​In this **instructor-led workshop**, participants will explore how graph databases can improve GenAI applications and reduce common challenges such as hallucinations. You’ll learn key concepts including **Large Language Models (LLMs), Retrieval-Augmented Generation (RAG), GraphRAG, vector search, knowledge graphs, and AI agents**. ​The workshop follows a **mixed format** with theoretical lessons combined with practical exercises while instructors are available to support and answer questions. ​During the session, you will learn how to: * ​Use **Neo4j to enhance GenAI applications** * ​Build **knowledge graphs from unstructured data** * ​Use **vector embeddings for similarity search** * ​Create **GraphRAG retrievers using Python** * ​Build a **conversational AI agent using Neo4j and LangChain**

**Welcome to Berlin's international training community! 🎾** **We offer professional training throughout the season, whether you're new to tennis and looking for a great start or a seasoned player seeking to enhance your skills. Our training programme features flexible booking sessions that mix learning with competition.** **Our aim is to equip players for the game whether you're playing for fun or aiming for Grand Slam success 😎**

**Rust Berlin on location 🏳️‍🌈** is a new, informal in-person Rust meetup group in Berlin. We are a interactive meetup format interested in mob coding, deep diving and problem solving together. We build toy projects, share experiences, discuss technology and learn new cool stuff. And you are welcome to join! No matter if you are writing Rust production code every day, if you already contribute to Open Source projects or want to start doing so, if you use Rust in hobby projects or if you are just curious what the hype and buzz is all about, you are very welcome! To coordinate and plan activities, please join our **[Rust Berlin on location 🏳️‍🌈](https://rust-berlin.zulipchat.com/join/gap4pdbz7xsquliiz7tgcyuk/)**[ Zulip chat](https://rust-berlin.zulipchat.com/join/gap4pdbz7xsquliiz7tgcyuk/)! **Planned programme** Being an informal meetup, we are open to anything between just meet and talk, explore nerd snipes and rabbit holes, mob code together, plan and build fun projects, tinker with electronics, and presentations with Q&A. With the [introduction](https://berline.rs/2026/04/01/berlin-talks.html) of the new [Rust Berlin Talks](https://berline.rs/about#rust-berlin-talks) meetup series, **[Rust Berlin on location 🏳️‍🌈](https://berline.rs/about#rust-berlin-on-location)** strengthens its focus on social community experience, the exchange of knowledge, ideas and perspectives, and the joy of spontaneity. This time, we have the following topics lined up: * Tobias has been working on a ***project wizard*** and would like to receive some feedback from the group. * Crop is going to introduce the topic of ***atomics***, then hold a discussion space for answering questions and sharing experiences. * Raf finally would like to introduce ***test-driven development*** with a small mob coding exercise. If someone brings other cool stuff, questions or problems, then let us dedicate the second half of the meetup time to that! Anyone is invited to bring their projects and questions, show something, ask something, or explore a topic together. The best conversations and deepest rabbit holes can emerge out of seemingly nowhere. **Projected upcoming meetups** We schedule regular meetups on Thursday evening every four weeks, using the slot between the Berlin Rust Hack and Learn online meetup (every two weeks), and the Rust Nuremberg online meetup (every four weeks). 16 April 2026 is our thirteenth meeting. Our next projected meetings are going to occur on the following dates: * 14 May 2026 (tentative, public holiday) * 11 Jun 2026 * 9 Jul 2026 * 6 Aug 2026 * 3 Sep 2026 * 1 Oct 2026 **Location** Our meetup location is the new shared office community space of Ferrous Systems, Slint and KDAB in Berlin Mitte, for up to 25 people. We are expecting to use this space as our default location for the time being, with the IN-Berlin e.V. community space in Moabit as backup. Regardless, as our group might eventually outgrow the locations' size limit, we are low-key looking for bigger locations. If you know a fitting location, then please let us know in our Signal group! Another workable way might be to split the meetup into smaller, interest-specific sub-groups instead. As the no-show rate on Meetup.com is rather high, consider showing up even if you are on the waiting list. We can't promise that there is any space left, but usually there is. So give it a shot! **Accessibility** The location has an elevator and a wheelchair accessible bathroom. Please note that the bathroom is two floors down from the meetup space. On our quest for a bigger location, we are going to pay special attention to accessibility. **Community** We aim to create a safe place for everyone and adhere to the [Berlin Code of Conduct](https://berlincodeofconduct.org/). Inclusivity is very important to us. If you are curious about Rust, but unsure if you are welcome to join: Yes, yes you are. Please come to the meetup! If you have special needs, please get in contact, we will try to accommodate you as best we can. We are part of [https://berline.rs/](https://berline.rs/) and like to hang out in the **[Rust Berlin on location 🏳️‍🌈](https://rust-berlin.zulipchat.com/join/gap4pdbz7xsquliiz7tgcyuk/)**[ Zulip chat](https://rust-berlin.zulipchat.com/join/gap4pdbz7xsquliiz7tgcyuk/). You are very welcome to join!

**Welcome to Berlin's international training community! 🎾** **We offer professional training throughout the season, whether you're new to tennis and looking for a great start or a seasoned player seeking to enhance your skills. Our training programme features flexible booking sessions that mix learning with competition.** **Our aim is to equip players for the game whether you're playing for fun or aiming for Grand Slam success 😎**

PLEASE NOTE: to attend to this meetup please RSVP directly at the [flight levels flight club event](https://www.meetup.com/flight-levels-flight-club-berlin/events/313519893/?utm_medium=referral&utm_campaign=share-btn_savedevents_share_modal&utm_source=link&utm_version=v2&member_id=206720451) **Flight Levels® Flight Club #11 - This time, we are doing something different!** For this **Flight Club** we’re playing a **hands-on flow game** where dice represent capacity, work moves across a simple board, and the system throws in the occasional surprise just to keep you on your toes. We’ll spend about 2 hours playing in small teams, then do a quick chat about what we noticed, and how it relates to our working environment. No prior knowledge needed and everyone is welcome. We will... * Play in multiple small teams * Roll dice, move work and see what happens * Capture data and metrics for analysis * Have some fun, and learn something * Quick debrief, and * Some networking opportunities Snacks and refreshments will also be available :-) The evening will look something like this... 17:30 — Arrival and socialising 18:00 — Start and introductions 18:15 — Simulation rules and constraints 18:30 — Simulation begins 20:30 — Debrief 20:45 — Wrap up 21:00 — Finish **We will start on time, so please be punctual.** Looking forward to seeing you on Thursday April 16th.

This group is for everyone who is interested in drawing portraits! For me, drawing has been a wonderful way to gain a new perspective on the world and the people within it. Whether you are just starting out or have been drawing for ages — all levels are welcome :) How it works: 1\. We meet at The Castle pub in Mitte and do short sittings of 15 minutes for each other\. The first sitting is divided into 3 warm\-up sketches\, 5 minutes each\. 2\. Before we start\, everybody writes their name on a blank card \(provided by the organizer\); these cards are then used to randomly pick the model every 15 minutes\. 3\. Usually we do 8 sittings\, with a 15\-minute break in the middle \(so after 4 sittings\, or 1 hour\)\. -> The participation is free, but it is expected that everybody orders something from the bar to support the lovely location. Get out your pencils and let's start! Please bring your own art supplies!

**⭐ NOTE THE NEW LOCATION! ⭐** 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/)

What are dbt meetups? dbt Meetups are networking events open to all folks working with data! Talks predominantly focus on community members' experience with dbt, however, you'll catch presentations on broader topics such as analytics engineering, data stacks, data ops, modeling, testing, and team structures. **➡️ Join the dbt Slack community:** [https://www.getdbt.com/community/](https://www.getdbt.com/community/) and make sure to add the **#local-berlin** channel in dbt Slack to be part of the conversation. 🤝 **Organizers:** Torsten Glunde (DDVUG), Stephan Durry (dbt Labs), Lucas Silbernagel (dbt Labs) **🏢 Venue:** Jugendherberge Berlin Ostkreuz - Marktstraße 9-12, 10317 Berlin **To attend, please read the Health and Safety Policy and Terms of Participation: [https://www.getdbt.com/legal/health-and-safety-policy](https://www.getdbt.com/legal/health-and-safety-policy)** **📝Agenda** * 6:00 PM: **Check in/Registration** * 6:30 PM: **Welcome Remarks** 🎤 (Torsten Glunde, DDVUG) * 6:40 PM: **What’s new with dbt?** 🎤 (Stephan Durry + Lucas Silbernagel, dbt Labs) * 6:55 PM: **1\. Talk:** **Model-driven Platform automation with dbt** 🎤 (Torsten Glunde, DDVUG) * 7:15 PM: Break * 7:30 PM: **2\. Talk:** **From Events to Decisions - Data Engineering in a Blue-Collar Hiring Marketplace** 🎤 (Shpat Cheliku + Jerry Nwabuilo, PowerUs) * 7:50 PM: Networking & Reception with Food and Drinks **Closing doors at 6:40** The Berlin dbt Meetup is always booked out within a few hours - it's amazing to see how many people from the dbt community want to attend. To give those that are on the waitlist a chance to attend, **please update your RSVP if your plans change**. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- dbt is the standard in data transformation, used by over 40,000 organizations worldwide. Through the application of software engineering best practices like modularity, version control, testing, and documentation, dbt’s analytics engineering workflow helps teams work more efficiently to produce data the entire organization can trust. Learn more: [https://www.getdbt.com/](https://www.getdbt.com/)

​GDG Berlin × Arbio ​ 🌍 ABOUT THIS EVENT ​ Join us for a Berlin AI Builders Meetup, organized by GDG Berlin and hosted by Arbio. ​This evening brings together engineers, builders, founders, and AI practitioners for practical, real-world discussions around AI, data, and modern software systems. ​Whether you’re building AI-powered products, working with cloud infrastructure, or exploring real-world AI use cases, expect insightful talks, open conversations, and strong community energy. ​ 📍 EVENT DETAILS ​• Location: Arbio Office — Greifswalderstraße 212, 10405 Berlin • Date: Thursday, April 16 • Time: 18:30 – 22:00 (GMT+1) ​ ⚠️ CAPACITY ​• \~70 seated spots available • Additional standing spots available • Entry is first come, first served — arriving early is recommended ​ 🎤 AGENDA ​18:30 – Doors Open Grab a drink, meet fellow builders, and get settled. ​19:00 – Talk 1 Building AI Designing context-first AI systems • Arnon Cavaeiro — Head of product @ Arbio ​🍕 Break — 15 min ​20:00 – Talk 2 Building AI Agents on GCP: Practical Lessons from AI Engineering • Nur Rafizade — AI Solution Engineer @ Deloitte ​🍕 Break — 15 min ​21:00 – Talk 3 AI in Cybersecurity • Hamza M'hirsi — Founder @ CyberDebunk ​🕺 Networking from 21:45 until 22:00 💃 ​ 🍕🍻 FOOD & DRINKS Food and drinks will be provided. ​ 🙏 THANKS & CREDITS A big thank you to Arbio for hosting and supporting the Berlin developer community. ​And a huge thanks to everyone in the community who helps make these events possible 💙

Ein Toast auf die Rhetorik. Wie wir aus dem Stegreif begeistern. Mit Tipps und Tricks für spontanes Reden. Allgemeine Infos Sich wortgewandter ausdrücken, bei einer Präsenation glänzen oder mit einer Rede auf der nächsten Feier alle vom Hocker hauen - all das und noch viel mehr können Sie hier lernen. Der Rhetorik-Club Mut und Rede Toastmasters Neukölln stellt sich vor und lädt Sie ein, Ihre eigenen Redekünste auf die Probe zu stellen. Weitere Infos Keine Vorkenntnisse erforderlich.

**⚠️ IMPORTANT: REGISTRATION MANDATORY ⚠️** Registration on **Luma** is **REQUIRED** to attend this event. **Link: [https://luma.com/nklicoct](https://luma.com/nklicoct)** Your registration is subject to host approval. You must complete the registration process on lu.ma to receive the full event location details and confirmation of your attendance. **Please note: Without approved registration on Luma, you will NOT be able to access the event location or attend.** We are excited to invite you to an interactive workshop hosted by LISS x Semrush and led by **Saeid Nobakht, Lead AI Engineer at Semrush**, focused on bringing agentic AI into production. The session will last around 2 hours, followed by a networking session with Semrush and fellow AI enthusiasts (and free pizza 🍴😋🍕!). Bring your laptop! And please arrive a bit early to get settled :) **Schedule** * 17:45 - Doors Open * 18:00 - Start of Workshop * 20:00 - Networking + Catering **Abstract** Building reliable agentic systems requires more than evaluating individual LLM outputs — it demands a systems-level approach to testing, observability, and operations. This session covers how to design evaluation frameworks for multi-step, tool-using agents; how to instrument and trace agent decisions for debugging and audit; and how to recognize and respond to common production failure modes. **Who is this for?** This workshop is open to everyone curious about building with agentic AI. Technical background and Python knowledge recommended. **⚡ FINAL REMINDER ⚡** **You MUST register and be approved on Luma to attend. The event location will only be visible after your registration is confirmed by the host. Link: [https://luma.com/nklicoct](https://luma.com/nklicoct)** *** About BLISS: Berlin's AI community connecting like-minded individuals passionate about machine learning and data science. BLISS Workshops connect students and young professionals with industry partners. Website: [https://bliss.berlin](https://bliss.berlin) YouTube: https://www.youtube.com/@bliss.ev.berlin

Unser internationales Sprachcafé richtet sich an Alt- und Neu-Berliner\*innen, Reisende und Anwohner\*innen - alle sind willkommen! Bei heißem Tee und Kaffee und frischen Waffeln könnt ihr mit Menschen aus aller Welt ins Gespräch kommen. Um das Eis zu brechen, haben wir verschiedene Spieleinheiten vorbereitet - wie zum Beispiel ein Kennlern-Bingo, Impro-Theater-Übungen und ein kleines Berlin-Quiz. Selbstverständlich ist die Teilnahme an den Spielen freiwillig und ihr könnt euch gerne einfach gemütlich unterhalten. Wir möchten vor allem Sprachstudierende ermutigen teilzunehmen, und Berlin in diesem Rahmen aus verschiedenen Perspektiven kennenzulernen, persönliche Kontakte zu knüpfen und in das kulturelle Kiezleben der Stadt einzutauchen. Teilnahme auf Spendenbasis

**\*\*\* We've Moved! Bold Penguin - 6555 Longshore St, Dublin, OH 43017 \*\*\*** Talk by Guy Royse [You've Probably Never Heard of the Reticulum Network](https://sessionize.com/s/guyroyse/youve-probably-never-heard-of-the-reticulum-networ/146919) **AGENDA:** * See updates to parking below * Doors open at 5:30, feel free to come and hang out before! * Official start of the meeting is at 6:30pm * After the meeting is done, we will go hang out at a nearby space in Bridge Park! If you can, please sign up via meetup by noon the day of the meeting so we can have an estimate headcount for food :) We always order extra, so feel free to join us even if you don't get signed up! Thank you to Bold Penguin for providing the food and location! **Parking & Arrival:** **Parking:** Parking in Bridge Park is free. The closest lots are the Mooney Garage and the Hotel/Endres Garage. **Entry:** The doors to the office are to the right of PINS. The street level door and elevators lock at 6pm. If you arrive after that, someone should be there to let you in, else call the number posted. Take the elevator to the 2nd floor. Once you exit the elevator, turn right. \*\*\* We are a bunch of professionals, students, and geeks who are excited about Ruby programming language ([http://ruby-lang.org/](http://ruby-lang.org/)) and Rails framework ([http://rubyonrails.com/](http://rubyonrails.com/)) and the joy they have brought back to web development. Our main goal is to share the love of the Ruby and Rails ecosystems with anyone that is interested. We cater to everyone, whether a non-programmer through advanced Rubyists. * We give lectures on programming topics * We freely provide decades worth of experience * For full details of this month's meeting please visit [http://columbusrb.com](http://columbusrb.com)

**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** GitHub Copilot is powerful, but what if you could scale from a solo AI assistant to an entire team of specialized agents working in parallel? This session introduces Squad: an open-source framework for multi-agent orchestration that lets you define teams of AI agents with specific roles, responsibilities, and expertise. We'll progress from Copilot basics to the Copilot CLI, explore how Agents add autonomy, and see how Instructions and Skills let you customize agent behavior. Then, the climax: a live demo where a Squad team of 3 agents (Lead, Developer, Tester) stands up and builds a working application in real-time, showcasing true multi-agent collaboration. Whether you're new to AI or exploring how to scale your use of Copilot, this session will show you what's possible when agents work as a team. **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

Rev. Steven Clevenger is an ordained spiritualist minister with over 40 years experience as a Spiritual Healer, Clairvoyant and Spiritual Teacher, educated and trained at the White Lily Chapel. Rev. Siobhan Wolf Shaffer is an ordained spiritualist minister and certified medium and healer with over 20 years experience. She began her development in 1988 in Pennsylvania and continued when she moved to Ohio in 1998 where she studied at Rays of Lights Church with Rev. Steven Clevenger. Our full worship services consist of an inspirational lecture, healing meditation, and messages from the spirit world that serve to demonstrate evidence of eternal life. Please visit our Official Church Website (http://raysoflightchurch.com) for more information.

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

**Welcome to the Brain Injury Alliance of Kentucky’s Support Group.** *\*\*This meeting has been moved to the 4th Monday of each month.* This group is a safe space for **survivors of traumatic and acquired brain injuries**, as well as their **families and caregivers**, to find support, share experiences, and connect with others who understand the journey. Whether you're newly injured, a longtime survivor, or supporting a loved one, you’ll find comfort, information, and encouragement here. Our professionally facilitated groups offer a confidential, compassionate setting for healing, learning, and growing together. Join us to discover the power of community—because no one should walk this road alone. *All survivors of ABI/TBI and those who care for them are welcome.* \* This meeting is for persons with brain tumors and their guests. \*\* This is a hybrid meeting. For those meeting in-person dinner is served at 5:45pm. Online begins at 6:30pm.

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!