Microservices

All thx to the sponsor! **Line-Up:** 👉 *TBD* by TBD **Speaker Bios:** 🗣 *TBD*

**ℹ️ The next meetups will be managed on Luma.** **You can register for this event 👉 [here](https://luma.com/yx73udov). Follow the Django User Group Berlin Calendar on Luma.** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- ​This time, we'll be hosted again by **[Kraken](https://kraken.tech/)** (the clean tech company, not the crypto one) - one of the largest Django codebases and employers. Be sure to chat to them while you sample their food and drinks. Our speaker, **Johannes Tigges**, consultant in Open Collaboration, Community Management, OSPO, spatial technologies, and DevOps, will give the main talk on: **“21 Days: The Free Beer That Turned Into a €500K Bill — and what to do about It”** Covering SBOMs, licenses, and why FOSS isn’t always as simple as it seems. As always, please make use of the lightning talks and talk about anything you like: a problem that you'd like help with, a thing you've built, or a hobby you like. Doesn't have to be Django, doesn't even have to be tech! **18:30 Doors open** **19:00 Main talk by Johannes Tigges** **19:30 Lightning talks** **19:45 Get eatin'** This event is governed by the **[Berlin code of conduct](https://berlincodeofconduct.org/de/).** We want this to be a safe space for all. Any questions and concerns can always be directed towards the organizers Lara Krämer (lara.softwareengineer@gmail.com) and Markus Binsteiner (markus@frkl.dev) before, at and after the event. **Accessibility information:** The main entrance door to the building is quite heavy and must be opened manually, as does the office door. There are a few steps leading to the elevator, along with a relatively steep ramp built into those stairs. If you need assistance, please reach out to us and we will do everything we can to accommodate you.

📆 Agenda * 19:00 Welcome to the PUB (Python Users Berlin) – setting up * 19:15 Main talk * 20:00 Lightning talks * 20:30 Social gathering 🎙 Main talk by [@esc](https://github.com/esc): Whirlwind tour of [Numba](https://github.com/numba/numba) In this talk I will take you on a whirlwind tour of Numba -- the Python just-in-time (JIT) compiler. I will equip you with with a mental model of how Numba works and what it is good at. At the end, you will be able to decide if Numba could be useful for you. 📚 Resources * https://github.com/esc/numba-talk ⚡️ Lightning talks Time will be open at the end of the night for lightning talks (short 5 minute presentations). Please bring your ideas and inspirations with.

Join us for the next Spring User Group Berlin meetup! This time, we are bridging the gap between rock-solid operations and developer joy. **Talk 1: Secure and Seamless: Injecting Kubernetes Secrets into Spring Applications** *Speaker: Dmitriy Goi, Deutsche Bank* Look, we’ve all done it. You need a database password, so you throw it into an environment variable and call it a day. It works, it’s fast, and your app starts up. But then the security audit hits, or your credentials rotate and suddenly your logs are full of connection errors because your Spring context is stuck in the past. At Deutsche Bank, "good enough" usually isn't. I’ve spent the last few years moving Spring apps into Kubernetes and realizing that most tutorials lie to you. They show you the easy way, not the way that survives in production. I’m going to show you why environment variables are a security trap and how mounting secrets as files actually works (and where it breaks). We’ll get into the mess of secret rotation, why you probably need a CSI driver or an External Secret operator, and how to make Spring Boot actually pick up those changes without a manual restart. **About the speaker:** A passionate software engineer at Deutsche Bank, Dmitriy brings 8 years of development experience to his focus on modernizing application development. He specializes in Spring Boot and Kubernetes and is currently helping lead the charge on migrating key applications to a hybrid cloud environment, emphasizing secure and efficient engineering practices. \-\-\- **Talk 2: Adopting Kotlin for Spring 7: Cleaner Code, Fewer Bugs, Some Tradeoffs** *Speaker: Daniil Tsarev, JetBrains* Kotlin is becoming a first-class citizen in the Spring ecosystem, especially with the latest features in Spring 7. In this talk, we'll explore how easy it is to adopt Kotlin in existing Spring projects, what tangible benefits it brings to everyday development, and where some edges still are. Expect practical examples, real-world tradeoffs, and an honest look at whether Kotlin is the right choice for your Spring stack. **About the speaker:** Daniil Tsarev is a Software Developer at JetBrains with over 10 years of experience working with the Spring ecosystem. Previously was developing a Spring-based full-stack framework for enterprise solutions. Now passionate about developer productivity, he’s dedicated to creating tools and solutions that make developers’ lives easier. **📅 Agenda** [**18:30**]: Doors open, food, drinks & networking [**19:00**]: Talk 1: Secure and Seamless (K8s Secrets) [**19:45**]: Short break [**20:00**]: Talk 2: Adopting Kotlin for Spring 7 [**21:00**]: Q&A and more networking [**22:00**]: Closing the doors Come for the knowledge, stay for the community. See you there! \-\-\- 📍 Venue Details 📌 Postal address: Otto-Suhr-Allee 16, 10585 Berlin 🚪 Entrance: Otto-Suhr-Allee 16: New Building 🚆 Getting there by public transport 🔴 Subway: U2, stop "Ernst-Reuter-Platz" 🚌 Bus: 245, M45, stop "Ernst-Reuter-Platz" 🚶‍♀️🚶 How to find the right entrance: 1️⃣ From Ernst-Reuter-Platz (U2 station or bus stop), walk towards the high-rise Deutsche Bank building with a bank branch. 2️⃣ To the left of this building, you’ll see Otto-Suhr-Allee 16: New Building. 3️⃣ At the very front of the building, you’ll see Dave B. café☕ , which means you’re almost there, yay! 🎉 4️⃣ Walk past the café Dave B. and head to the first entrance of the office building with glass rotating doors (it will be on your left). 5️⃣ Signage with the event name will be placed near the entrance. 6️⃣ You made it! Enter and proceed to check-in at the reception. \-\-\- **IMPORTANT** ⚠️ Check-In Procedure ‼️ Your full name must be correctly listed in your RSVP (e.g., Max Mustermann). ❌ Incomplete or unclear names (e.g., j, j k, Happy Cat) will not be allowed entry due to strict security policies. ✅ Please bring a valid ID 🆔 for name verification at the entrance. If you'd rather not change it here, just message me your name on LinkedIn or via email so I can add you to the guest list. You can find all my contact info at [https://asm0dey.site](https://asm0dey.site.)

Join us for the next Spring User Group Berlin meetup! This time, we are bridging the gap between rock-solid operations and developer joy. [Sign up now to secure your spot!](https://www.meetup.com/spring-user-group-berlin/events/313094589/?slug=spring-user-group-berlin&eventId=313094589)

**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://signal.group/#CjQKIApfEgb36v82nhIb7m6zLCQjEtSEZubR7UvywTcWZXxdEhBWxhMWNCKekvtCYX7iDRRm)**[ Signal group](https://signal.group/#CjQKIApfEgb36v82nhIb7m6zLCQjEtSEZubR7UvywTcWZXxdEhBWxhMWNCKekvtCYX7iDRRm)! **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. This time, Flix will walk us through error handling approaches in Rust — from typed error enums to crates like anyhow and thiserror — and present his own take: neuer-error, a single-type error library that captures source locations instead of backtraces and provides typed, discoverable error context without generics soup. Then Raf will show off a fun project that renders canvas primitives with vector and matrix geometry, built from scratch with zero dependencies. 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). 19 February 2026 is our eleventh meeting. Our next projected meetings are going to occur on the following dates: * 19 Feb 2026 * 19 Mar 2026 * 16 Apr 2026 * 14 May 2026 (tentative, public holiday) * 11 Jun 2026 * 9 Jul 2026 * 6 Aug 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 Berlin Rust Hack and Learn online meetup's [Matrix channel](https://matrix.to/#/!xycQxSjSAvEezkyztA:chat.berline.rs). You are very welcome to join!

Ready to stop hearing about AI and start using it? ✨ New tools like AI automation are opening doors for creative and adaptable professionals to lead the change in their industries. **Register for our Event Here:** [https://3vgdb.share.hsforms.com/2IWuk86BbTmuYAWHoCxc2xg](https://3vgdb.share.hsforms.com/2IWuk86BbTmuYAWHoCxc2xg) Join us at **WBS CODING SCHOOL** for an exclusive in-person talk and collaborative build with Lead Instructor Maria Blanco. We are moving past the buzzwords to show you how AI can become your most powerful professional tool. **What you'll learn:** * **Beyond the Buzz:** Clear distinctions between AI Assistants, Automations, and Agents. * **Collaborative Live-Build:** Participate as we set up an AI-enhanced automated workflow using [Make.com](http://Make.com). * **No-Code Empowerment:** Discover that integrating AI tools is an achievable step without any coding skills. This session is perfect for professionals in tech-adjacent roles, absolute beginners, and anyone ready to start their journey in AI. 🤝 **Event Details:** * **Date:** Thursday, February 19 * **Time:** 18:00 – 19:30 * **Location:** Cuvrystraße 1, 10997 Berlin \-\-\- **About WBS CODING SCHOOL** Empowering ambitious minds to conquer the tech world. Since 2019, we’ve been breaking barriers to make tech careers accessible to everyone. From AI, Data, UX/UI to AI Software Development, our expert-led courses teach skills that matter. But we’re more than just a school – we’re a thriving community where passion meets opportunity. Ready to launch your future? Join us and build the career you deserve.

Hi, we are an international reformed evangelical church located in Berlin Tiergarten. The next sunday after the valentine weekend (the 22nd Feb, not the 15th Feb), we hosting a choral service on sunday. It is like your regular church service, but we will put more emphasize on the singing, choir, or the music so that it will have a bit of that concert vibe. There will be some pieces from Mendelssohn, Faure, Gounod, etc. Come over if you like music in general and have no issue to visit a church service (you never know here in Berlin, some people are very opposed :))

Join us for a welcoming and reflective Saturday evening worship service in Engish. This service follows a classic liturgical form and includes Holy Communion, offering a meaningful and grounding way to end the week. The liturgy is a bit shorter than our Sunday service. After worship, stay for fellowship and conversation. Whether you are new to faith, returning after a long time, exploring Christianity, or deeply rooted in the tradition — you are truly welcome here. And when we say *all*, we mean **all**. Come as you are. You belong. We celebrate open communion, meaing all are wecome to recieve Holy Communion.

**⭐ 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 if your AI agent could talk to other agents… without you in the middle? 👀 Welcome to **Sprint #2 of the Agentic AI Engineering Lab** — a hands-on playground for developers, tinkerers, and curious minds. This time, we’re diving into the **[A2A (Agent-to-Agent) Protocol](https://a2a-protocol.org/)**, an emerging open standard designed to enable seamless communication and collaboration between autonomous AI agents. We won’t just talk about it....We’ll build, experiment and break it. Join us to see what happens. *** ### 🧪 What We’ll Do **10:00** — Quick round of introductions **10:10** — Intro session: Understanding the A2A Protocol **10:30** — Build time (hands-on experimentation) **12:00** — Live demos + technical teardown **12:45** — Wrap-up + takeaways *** ### 🚀 What to Expect * Hands-on building, not passive listening * Real agent-to-agent experiments * Collaboration with fellow builders * Fast ideas, quick tests, lots of learning *** ### 🚫 What Not to Expect * Long lectures * Step-by-step tutorials * Sales pitches * Perfect code This is a **lab** — we learn by building, breaking, and iterating. *** ### 👩‍💻 Who Should Join Curious developers, tinkerers, and engineers, with basic knowledge of AI Agents. Bring: * Laptop with dev setup * Access to an LLM (Claude / OpenAI / Ollama) * Comfort building small things in any language *** ### 📍 Location We first assemble at **Steinecke** (opposite **Martin-Luther Hospital**) before heading to the private boardroom. So, please **arrive before 10:00 AM CET.** Spots are limited to keep it interactive.

Join us for an upcoming in-person Lean Coffee meetup. Lean Coffee is a lightly-structured meeting format where the attendees create the agenda. Bring your management challenges; whether you're managing people, products, processes or beyond, and solve them together with peers from a diverse set of backgrounds. This event is great for anybody trying to create better ways of working and wants to share with + learn from others trying to do the same.

📅 **Week 5 Focus: Creating Flash Cards** Each 7-week cycle focuses on a small, well-defined part of a larger system—and over time, these cycles build toward a complete, real-world project Feel free to join at any week and we will catch you up. There is no need to be at the beginning of the cohort to build. Complete beginners welcomed! 📌 By the End of a Full Cycle, You should Have 🎯 A working project in your own GitHub repo 🎯 A small but real portfolio piece you can demo or write about 🧠 **Current Project** This cycle’s shared project is an **image-based knowledge extraction system**. In Week 4, we tried **LLM-based APIs** to extract structured information from images. **In** **Week 5** we will systematically converting segmented images and extracted text into standardized flashcards — padding, resizing, formatting, and preparing them for print. * \*\*\* **👋 Who Is This For?** 🔹 Beginners who learn best by doing — no prior experience needed 🔹 Career switchers from product, engineering, design, marketing, or other fields who want to break into data 🔹 Analysts, engineers, and PMs looking to sharpen their skills or build real-world projects 🔹 Data professionals who want a creative playground outside of work 🔹 Anyone with big questions and a love for learning through experimentation \*\*\* **BUILD. LEARN. EXPERIMENT. OVER COFFEE.** Come hang out, meet like-minded people, and work on something fun. 📍 Based in Berlin – in-person meetups only (for now!) 💻 Laptops + ☕ highly encouraged Join our Discord → [https://discord.gg/dPnmzcCP8w](https://discord.gg/dPnmzcCP8w) Check out our program resources: [Google Drive](https://drive.google.com/drive/folders/15DmZqD4bLBk2vU4zpvh1HiB3_5n09v-q?usp=sharing) \*\*\* ✨ Who’s Hosting? I’m Lindsey, a senior data scientist working on AI, causal inference, and data products. I’ve built models for fraud detection, uplift modeling, and LLM-based systems. I am always open to suggestion for different format for this meetup.

Welcome to Sunday Tech Coffee. This is a **networking** event for those in the tech industry in Berlin. We are usually inside and to the right. Ask the barista/bartender if you can't find us.

**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** *Spec-Driven Development with GitHub Spec-Kit: From Intent to Implementation* Spec-driven development flips the traditional workflow on its head: instead of code being the source of truth, the specification becomes the backbone of design, collaboration, and delivery. In this session, we’ll explore how GitHub Spec-Kit enables teams to treat specifications as first-class artifacts—living documents that drive architecture, implementation, and verification. You’ll learn how Spec-Kit helps teams clearly express intent using structured, version-controlled specs that live alongside code. We’ll walk through a practical workflow that starts with defining system behavior and constraints, then progressively refines those specs into testable, automatable outcomes. Along the way, we’ll show how specs can reduce ambiguity, improve cross-functional collaboration, and make design decisions explicit before a single line of production code is written. This talk will cover: --What spec-driven development is (and what it isn’t) --How GitHub Spec-Kit fits into modern developer workflows --Using specs to align product, engineering, and AI-assisted development --Real-world examples of turning specs into implementations with confidence Whether you’re building greenfield systems, integrating AI into your stack, or trying to reduce costly rework, spec-driven development offers a scalable way to move faster without sacrificing clarity. Attendees will leave with concrete patterns and a clear mental model for adopting GitHub Spec-Kit in their own projects. **YouTube Link** TBA

WQC has weekly Thursday night social nights at the Westerville Java Central. Come and grab a coffee and connect with the community: low stakes, chill environment, and tasty drinks. No registration is required; come as you are.

Want to be a speaker? submit your talk to our Call for Presenters!!! https://sessionize.com/cbus-hug-2026/

Connected Westerville Night of Networking flips the script on networking, with surprises and connections that'll make you say, "Who knew networking could be this much fun?!"

Meeting @ Improving's office in Downtown Columbus, near Cosi. Parking is paid, food & drink are free! This time we're hanging out after the long winter break. We are going to look at a group-member's project used to help learn the fundamentals of Go, and if time allows, we can take a look at how we like to build Go projects using AI.

Join us at Losing Weight in Columbus at Bloc Garten on a Saturday afternoon. This will be an active and engaging day, in lieu of our weekly check in. Why climbing you may ask? Because that's what I know best, and also since its and indoor sport, its great for a winter time hobby! Join us and find out what it's all about! We'll also do a brief check in to see how everyone is doing. 🚨🚨 Day passes cost 23$ + 7$ shoe rental fee for a total of 30$ 🚨🚨 [https://5.life/bg/](https://5.life/bg/)

We will show a variety of methods for building agents that run in Microsoft Foundry. This covers the different types of agents: Prompt, Multi, and Hosted, as well as the development lifecycle using evals and traces.