MongoDB

Welcome to the PyData Berlin May meetup! We would like to welcome you all starting from 18:00. There will be food and drinks. The talks begin around 18.30 and the doors will close at 18:45. **Make sure to arrive on time!** Please provide your first and last name for the registration because this is required for the venue's entry policy. If you cannot attend, please cancel your spot so others are able to join as the space is limited. **Host**: **GetYourGuide** is excited to welcome you to this month's version of PyData. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* The Lineup for the evening **Talk 1: Text2SQL in the Wild — Agentic Workflows & Semantic Models on Customer Data** **Abstract**: Translating a business user's natural language question into a reliable SQL query has huge value for business analysts, but doing it accurately at scale, on messy enterprise data, for complex queries, is incredibly difficult. This talk walks through a production Text2SQL system built on four pillars: semantic models built on customer data, RAG-based semantic search, an agentic verification and correction loop for building the SQL, and an evaluation framework for the entire process. Raw schema information is not enough for text2sql to work. Rather, thorough documentation including business metrics, synonyms, and qualified example queries, are required. We'll cover how to automate this documentation pipeline by mining query logs, generating descriptions with LLMs, and organizing everything into a knowledge graph and vector search index. From there, we'll dive into the agentic flow that takes a user question and iteratively generates, validates, and fixes SQL against a live database. The agentic framework analyses syntax errors and execution results to help it fix the SQL. Participants will leave with practical takeaways on RAG architecture for structured data, agentic retry patterns, and how to think about evaluation for Text2SQL systems in production. **Speaker**: Oren Matar **Bio**: Oren Matar is a principal data scientist and algorithms developer, with a background in social sciences and Bayesian methods. He specializes in NLP and time series forecasting, as well as agentic methods for data retrieval and processing. **Talk 2: Interpreting and Communicating Statistical Models** **Abstract**: Extracting actionable insights from complex statistical models remains a challenge, as raw coefficients are often uninterpretable due to nonlinearity, interactions, or hierarchical structures. This talk introduces a unified framework for model interpretation based on the principles of the Marginal Effects project ([https://marginaleffects.com/](https://marginaleffects.com/)). We move away from internal model parameters toward quantities of interest, such as marginal effects and adjusted predictions that translate statistical output into the "natural language" of the data. We will demonstrate these concepts in Python using the Bambi interpret module, showcasing a seamless workflow for interpreting Bayesian models built on PyMC. The audience will learn how to use the four primary interpretative pillars: Predictions, Comparisons, Slopes, and Marginal Means to compute average marginal effects and visualize conditional relationships. By the end of this session, you will be equipped to turn sophisticated GLMs and multi-level models into clear, rigorous narratives that are easily communicated to stakeholders. **Speaker**: Juan Orduz **Bio**: Juan is a Mathematician (Ph.D. Humboldt Universität zu Berlin) and Principal Data Scientist at PyMC Labs. He is interested in interdisciplinary applications of mathematical methods. In particular, time series analysis, Bayesian methods, and causal inference. **Lightning talks** There will be slots for 2-3 Lightning Talks (3-5 Minutes for each) between the two main talks. Kindly let us know if you would like to present something :) \*\*\* NumFOCUS **Code of Conduct** THE SHORT VERSION Be kind to others. Do not insult or put down others. Behave professionally. Remember that harassment and sexist, racist, or exclusionary jokes are not appropriate for NumFOCUS. All communication should be appropriate for a professional audience including people of many different backgrounds. Sexual language and imagery are not appropriate. NumFOCUS is dedicated to providing a harassment-free community for everyone, regardless of gender, sexual orientation, gender identity, and expression, disability, physical appearance, body size, race, or religion. We do not tolerate harassment of community members in any form. Thank you for helping make this a welcoming, friendly community for all. If you haven't yet, please read the detailed version here: https://numfocus.org/code-of-conduct \*\*\*

Women’s Full Body Strength, Hormonal Balance & Body Confidence A welcoming women-only personal training class designed to help you feel stronger, more confident and more connected to your body. Through a mix of full-body strength training, body sculpting, conditioning and supportive coaching, you’ll improve fitness, build strength and support your overall hormonal wellness in a positive and empowering environment. This class also focuses on women’s health, including: • PCOS-friendly training • Hormonal balance & metabolism support • Stress-conscious and sustainable exercise • Building confidence and body awareness Suitable for beginners to intermediate fitness levels. NOTES: * Wear comfortable activewear that makes you feel confident and free to move * Use clean shoes or socks * Please bring water and a towel * Arrive 5 minutes early so you can settle in and enjoy the session.

Register: https://www.eventbrite.de/e/build-smarter-ai-graphrag-generative-ai-workshop-tickets-1985345958205 Join us for a hands-on introduction to Generative AI with Neo4j at 42 Berlin. **Large language models are powerful — but without structure, they lose context fast.** **As part of the mAI ist für AI series at 42 Berlin, this workshop explores how [Neo4j](https://neo4j.com/ "https://neo4j.com/") can improve GenAI applications and reduce common challenges such as hallucinations.** 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, combining short theoretical inputs with practical exercises**. Participants will work through tasks while instructors are available to support and answer questions.

Women’s Full Body Strength, Hormonal Balance & Body Confidence A welcoming women-only personal training class designed to help you feel stronger, more confident and more connected to your body. Through a mix of full-body strength training, body sculpting, conditioning and supportive coaching, you’ll improve fitness, build strength and support your overall hormonal wellness in a positive and empowering environment. This class also focuses on women’s health, including: • PCOS-friendly training • Hormonal balance & metabolism support • Stress-conscious and sustainable exercise • Building confidence and body awareness •Eating Disorders Suppot Suitable for beginners to intermediate fitness levels. NOTES: * Wear comfortable activewear that makes you feel confident and free to move * Use clean shoes or socks * Please bring water and a towel * Arrive 5 minutes early so you can settle in and enjoy the session.

Join us for an evening on the practical side of AI agents. We'll dig into context engineering and why relevance matters more than prompt tricks, then look at what it takes to run autonomous agents safely alongside humans. Food and drinks provided — stick around after for networking. ✍️ RSVP asap as capacity is limited so grab your spot asap! 📅 **Date and Time** Wednesday, May 27, 2026 from 18:00-20:45 📍 **Location** [EBCONT office, beyond Quartier Heidestrasse, 34, 10557 Berlin](https://maps.app.goo.gl/aQGPgteqhQ2yrmx96) 📝 **Agenda** 18:00 – Doors open, arrivals and check-in 18:20 – Welcome note by EBCONT 18:30 – **Agent Builder Hope is not a strategy — relevant context for data driven agents** by Anderson Queiroz — Elastic *What are agents and context engineering? And why we think the "center of gravity" for context engineering is much more about relevance and your data than only prompts and memory management.* 19:00 – Q&A & quick break 19:15 – **Adapting to AI in Security** by Jenny Pinheiro — Tines *Best practices for autonomous AI and human interaction in the context of workflows.* 19:45 – Pizza, drinks & networking \*\*\* Invite your friends and join us for an evening of learning and networking with fellow engineers and speakers! Thank you to **EBCONT** for hosting and to **Tines** for teaming up with us on this one!

### Creative Session for Song-Writers & Writers to connect, share & grow. Together. We create a safe and inspiring space guided by our DNA. Members and invited Artists - where Writers of all styles and backgrounds are welcome. ‍ ##### **WHAT TO EXPECT:** * Introduction: Connect, meet fellow artists, and ease into the space together. * Writing Session: Work on Your own project / get inspired by our creative prompts. * Feedback Round: Share Your work and receive thoughtful, constructive feedback. * Stage Time: If You feel comfortable, You are welcome to perform Your lyrics, poem / song. ‍ ##### **STAGE PERFORMANCE:** If You would like to perform, please bring Your instrumentals / backing tracks on Your phone. You can connect via Bluetooth to our mixer. A keyboard and guitar will also be available if needed. ##### **GUIDELINES:** * Offer encouraging and constructive feedback: “This part was strong—lean into it. You might explore this further…” * Be mindful that some pieces may be personal or sensitive. Please include trigger warnings where needed. * We create this space together - with respect, openness, and care - so everyone feels safe to express themselves. ‍ ##### **TICKETS:** available at the Box Office before the class ‍ ***Get ready to explore different writing styles, deepen your craft, and connect with new people.*** ‍ ...for more info check out www.dna-artclub.com / follow us on IG: @nightart.club See You soon :) Love. DNA. ______ \*Members of Dair Night Art e.V. and Subscribers of DNA. Art GbR. \*\*By entering the DNA. ART HOUSE, You agree to comply with the Hausordnung of Dair Night Art e.V. and Geschäftsordnung of Dair Night Art e.V. Please ensure You review these documents thoroughly in advance.

**Bob on Tour – IBM Bob live erleben 💙** Wie fühlt sich ein agentischer Coding Assistant im echten Entwicklungsalltag an? Bei **Bob on Tour** kannst Du IBM Bob gemeinsam mit Expert:innen hands-on ausprobieren. In einem eintägigen, technisch fokussierten Format arbeitest Du an realistischen Coding-Aufgaben, von geführten Labs bis zur Anwendung auf eigene Use Cases. Dabei lernst Du, wie Bob Entwicklungsworkflows ergänzt, Codebasen verständlicher macht und mehrstufige Aufgaben unterstützt. **Das nimmst Du mit:** ✅ Sicherer Umgang mit den wichtigsten Bob-Funktionen ✅ Praktische Erfahrung mit agentischer Coding-Unterstützung ✅ Impulse für reale fachliche und technische Problemstellungen 👉 **[Jetzt anmelden und IBM Bob live erleben](https://luma.com/5g0x9318)**

Welcome to our cosy Godot Engine Community Meetup! 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! 🦜 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 [Saftladen Game Collective](https://saftladen.berlin), Normannenstraße 1-2, 10367 Berlin-Lichtenberg. 🌳 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/)! 🕊️

Nice! You are looking for real long time friendship! You might have already lived in Berlin or other big cities and experienced the "Anonymous" culture for a while. Meeting random people over and over and never see the same person again! In order to find "Real Long Term Friendship" in Berlin, do as follows: * You should not care how many people are joining this meetup. You RVSP. Even if only one person is joining. Because if everyone are waiting for everyone else to RVSP, nobody joins and nobody finds a new friend. * You do not care how many people of the opposite sex are joining. You are looking for friends. Finding the best romantic partner in the world, while avoiding not very attractive others, can be your other goal, for another time. Here we are looking for Friends. Real ones. * You are going to risk a very precious property of yours: Your time! Yes, there are thousands of opportunities in Berlin, there might be a rock concert for free, a birthday party you might miss, an important person might call you and invite you spontaneously, but you never find new friends until you decide to risk your time and meet people anyway. "I will check my calendar and get back to you" also does not work. Commit your time and spend it. Trust me, you won't go bankrupt ;-) * You are ready to use your phone as a real phone! You might have been using your phone as a tablet to visit Instagram and Facebook and watch movies. But if you want to find friends, you must know that people might take your phone number and give you theirs. That means they will Call you! And you have to pick up the phone and answer it. If you want to find new friends, you must be ready to do something really hard for the first time after years: Call people first, and if they called you: Answer your phone! * You are going to meet some people twice! That's the point of friendship. We already can experience random encounters with random people in random places one at a time. But that is not called friendship. If you want friends, you must be ready to meet the same person more than once. If you agree with above, RVSP and COME! You will meet other people who think the same way. P.S: Now that you've read all the way down to here, I suggest you [watch this animation](https://player.vimeo.com/video/547249272?h=22f3dd0f6f).

​Wir laden dich ein, Tango zu entdecken oder bei uns zu üben, wenn Du schon tanzt - egal, ob Du führen, folgen oder nur eine Rolle ausprobieren willst. alle infos: @ queerkultural Es gibt uns am letzten Sonntag und die Schwesterveranstaltung jeden Dienstag. Warum TANGO? Tango ist eine soziale und körperliche Aktivität, die uns aus der digitalen Welt in die physische und sinnliche Welt zurückführt wie Yoga oder Tai-Chi, was hilft, die Verbindung zum Boden, zu uns selbst und zum Anderen spüren - für gute Laune, Selbstwirksamkeit, digitales Detox. Und: Musik durch Bewegung auszudrücken, mag fast jede/r. **insta: queerkultural** Tango 4 All- PRACTICA & Classes SOLID, Graefestr. 18, Berlin Kreuzberg. ​18:30 - Tango Bodyscan, Verbindung mit dem Anderen. Auch für Neueinsteiger zum Ausprobieren. 19:15 - Übt, fragt, kommt allein oder mit Freund:innen 21:15 - 22:00 Input für eine circuläre Figur UKB Vorschlag: 5-20 Euro, je nach Möglichkeit. DE/EN/ES Folge uns für aktuelle Infos und Änderungen auf @queerkultural [ https://www.instagram.com/queerkultural?igsh=MXVuYnk1bmtpOWNqMg=](https://www.instagram.com/queerkultural?igsh=MXVuYnk1bmtpOWNqMg==) 🇬🇧 We invite you to discover Tango, whether you want to lead, follow, or simply try out a new role. If you already dance, come by to practice! It is a space to learn from one anothe Tango is a social and physical activity that brings us back from the digital world into the physical and the sensory realm. Much like Yoga or Tai Chi, it focuses on our connection to the ground, to ourselves and to one anothe Your hosts are Davide, Nacho, Pietro, Rafa. We appreciate a donation of 5-20 Euro. Water is free, Limonade, beer, wine, available.

This is another event from the "All in Kubernetes" event series. This group is focused on using Kubernetes for everything. All in Kubernetes. Data, databases, AI, ML, and all kinds of stateful workloads on Kubernetes and Talos. *** **Schedule:** 6:00-6:30pm - Open doors, pizza, drinks & networking 6:30-7:15pm - (Em)Powering Postgres with Talos and Simplyblock - [Chris Engelbert](https://www.linkedin.com/in/noctarius/?utm_source=luma), Simplyblock 7:20-8:05pm - How Talos Makes It Easier To Build a Cluster Management Platform - [Utku Özdemir](https://www.linkedin.com/in/utkuozdemir/?utm_source=luma), Sidero Labs 8:05-8:45pm - Drinks & Networking **​Who Should attend:** Anyone interested in talking and learning about Data, AI and Stateful workloads on Kubernetes and Talos. ​ **When & Where:** May 27th, 2026, 6:00pm Antler office, Jägerstraße 32, 10117 Berlin Sponsored by [Sidero Labs](https://www.siderolabs.com/), [simplyblock](https://simplyblock.io/) and [Antler](https://www.antler.co/)

While we are approaching the middle of the year and KotlinConf is just over - we are thrilled that Trade Republic hosts us again! So mark the date! **Line-Up:** 👉 **Lists, Sequences, and Flows: Scaling Data Processing in Kotlin without Melting Your Memory.** *by Daniela Valero* In this talk, Daniela shares her journey of meeting a major backend deadline while managing a data pipeline's memory footprint. You’ll learn how to transition from eager List operations to lazy Kotlin Sequences and jOOQ Streams (using database fetchSize chunking) to keep memory usage flat. Finally, we’ll explore using Kotlin Coroutines and Flow to introduce safe concurrency so your data processes quickly without straining your database. 👉 **The show must go on** Kotlin-based Kafka dead-lettering solution without external (system) dependencies *by Blagoja "Baki" Stamatovski* **👉 Job Market Insights from a Kotlin developer** *by* Ivan Gafurov **Speaker Bios:** 🗣 **TDB**

**Berlin, let’s talk agents. 🚀** We’re bringing the local AI community together for another evening focused on the fast-evolving world of **generative AI and autonomous agents** — and how teams are turning them into practical, scalable solutions. The meetup will feature a short session on what it really takes to **operationalize AI agents**: from design and deployment to oversight, orchestration, and management in production environments. After that, the floor is yours — with plenty of time to meet other builders, exchange perspectives, and continue the conversation over food and drinks. **What to expect:** 🎤 A featured talk on building and managing AI agents in practice 👀 A closer look through live demos 🤝 Informal networking with AI practitioners, builders, and innovators 🍻 Discussions with the Berlin data & AI community over drinks and pizza Whether you’re already experimenting with multi-agent systems or just starting to explore the space, this meetup is a chance to hear how others are approaching the challenge, share ideas, and connect with peers in Berlin.

Join us for the **Data Berlin Meetup**, an evening of talks, insights, and networking for the data community in Berlin. RSVP on Luma at https://luma.com/s9868ww4. **Agenda** **6:30 PM – 7:00 PM** — Registration and Networking **7:00 PM – 7:10 PM** — Welcome and Opening Remarks — Data Berlin Meetup Team **7:10 PM – 7:35 PM — Rewiring the Engine: Taming Billions of Audience Data at Scale** **Speaker:** [Adedeji Rodemade](https://www.linkedin.com/in/adedeji-rodemade/), Team Lead Data Analytics Engineering **7:35 PM – 7:40 PM — Short Break** **7:40 PM – 8:05 PM — Creating a Parallel Universe: How We Evaluate The Impact of Ad Campaigns in the Physical World** **Speaker:** [Majid Mostafavi](https://www.linkedin.com/in/majid-mostafavi/), Team Lead Data Science **8:05 PM – 8:30 PM — From Snaps to Footsteps: Experiments for Measuring Offline Impact** **Speaker:** [Mihaela Tsankova](https://www.linkedin.com/in/mihaela-tsankova-48560453/), Group Manager, Marketing Science at Snap **8:30 PM – 9:30 PM — Closing Remarks and Extended Networking** **About our host** **[Adsquare](https://www.adsquare.com/?utm_source=luma)** helps brands connect people and places in a **privacy-first** world with **location intelligence** — data and tools for planning, activation, measurement, and attribution across digital marketing and drive-to-store campaigns. **Looking for a job?** Browse data & AI roles in Berlin (updated daily): [databerlin.net/jobs](https://databerlin.net/jobs) **Want updates or more info?** Subscribe to our newsletter: [databerlin.substack.com](https://databerlin.substack.com). Follow us on [LinkedIn](https://www.linkedin.com/company/data-berlin?utm_source=luma). Join our [Slack community](https://join.slack.com/t/data-brln/shared_invite/zt-2ued0xvdu-aihzi2cKEwD_6_KDRd_1ag?utm_source=luma).

**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** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** https://youtube.com/live/BltmWMH1zG0?feature=share

Start your week the right way with Manic Mondays. Giving you an enjoyable Bachata lesson with a push of cool moves. The second hour has Beginner/Intermediate Salsa on 1. You must understand basic Salsa skills to participate. 730pm-830pm Bachata Cool Moves 830pm-930pm Salsa On 1 (Beginner/Intermediate) 15 for One Class 20 for Both Free Parking & Plenty of Dance Space. Viva Dance Columbus 2809 Festival Lane Dublin OH 43017

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

**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

🎶 Ready for a night of music, laughs, and great company? Join us at Thunderwing Brewing for Music Bingo — a fun twist on classic bingo where songs replace numbers and the good vibes keep flowing! 🎵 Sing along, test your music knowledge, and enjoy a relaxed evening with the group. 📍 Please RSVP to reserve your spot: Text Renee at 614-257-9389 (We need a headcount so the brewery can plan staffing and seating.) 🪑 Arrive early to grab a seat — feel free to bring a camping chair for extra seating. 🍔 Food trucks are often on site, or you’re welcome to bring your own food. 🐶 Bonus: Dogs are welcome, so bring your pup along too! Columbus ski club membership not required for this event. CSC assumes no responsibility for the event or any injuries as this is organized by a third party.

Come out to Improving for our monthly iOS and Mac meetings. This Month's Presentation: Nothing yet. (You should volunteer). What is Cocoaheads (http://cocoaheads.org/)? CocoaHeads is a group devoted to discussion of Apple Computer's Cocoa Framework for programming on MacOS X and iOS (including the iPhone, iPad and Apple Watch). During monthly meetings, members present on their projects and offer tutorials on various programming topics. What is BuckeyeCocoa (http://buckeyecocoa.org/)? BuckeyeCocoa is a group of Objective-C/Swift developers/enthusiasts. We host monthly Cocoaheads and near-weekly NSCoder meetings in Columbus, Ohio. The meetings are free to attend. Presentations! Presenters welcome! We are always in need of people willing to present material. Any Swift and/or Objective-C related topic is welcome. Times can be 5 minutes (i.e. lightning talks) to a maximum of 2 hours. Interested? Contact info is on the BuckeyeCocoa website. To volunteer for a presentation contact us at @BuckeyeCocoa on Twitter. Follow us on Twitter! @BuckeyeCocoa (https://twitter.com/#!/Buckeyecocoa/) For more information: http://buckeyecocoa.org/