Context Driven Testing

On the 1st of July we will host the next iteration of our monthly Audio Developer Meetup where **Peggy Sylopp** from [sinceare](https://www.sinceare.com/) will be presenting her work on personalization approaches for hearables, and **Vlad Litvinenko** will demo 'Spotykach', a looping playground. See below for details! As always, there will be a chance to network over drinks and pizza. Anyone interested in Audio development is welcome! Doors open at 18:00, talks start at 18:15. Please note: Attendance is **strictly limited** to people who have RSVP'd. Talk details: **Can users train their own audio system?** \- Peggy Sylopp In this talk, we present Sinceare’s closed-loop personalization approach for hearables. Instead of relying on predefined fitting rules or static presets, users teach the system how it should sound through interaction and feedback. These preferences are transformed into personalized machine-learning models that learn how to control existing audio processing algorithms according to individual preferences. Rather than replacing audio DSP algorithms, the generated models act as an adaptive control layer that continuously adjusts algorithm parameters based on user-specific listening preferences. Based on more than eight years of research and a recent study conducted with Fraunhofer IDMT and Charité, we will share insights into user-driven audio model generation, human-in-the-loop machine learning, and the path from research prototype to future embedded hearable deployment. **Spotykach, a looping playground** \- Vlad Litvinenko Vlad is a Berlin based software developer doing e-commerce by day, bleeping machines at night and sometimes music in between. The talk is about device they’ve recently built. It’s “Spotykach”, a looping playground, as they call it. It started from an attempt to do a simple Beat-Repeat kind of plugin, but then evolved into a community project within Synthux Academy with people from different backgrounds and countries.

Welcome to **The Improv Lounge**, a space where the social is as centre stage as the show. Think soft chairs, a sweeping verandah (if the weather's right!), refreshing drinks, group warm-ups & improv—the ultimate icebreaker! **The Improv Lounge** is all about *community*, *connection*, and *creative collaboration*. Come learn new skills, play games, and meet new people in a completely relaxed environment. **You are also invited to stick around afterwards to drink & chill.** [RSVP here](https://www.dna-artclub.com/events/improv-lounge) *Suited to those who enjoy performance, it's also suitable for internationals living in or passing through Berlin hoping to meet new people in a fun and structured way.* It all takes place at **[DNA. Arts’](https://www.dna-artclub.com)** exciting new location, just a minute's walk from the *Kottbusser Tor U-Bahn station*. The venue offers a huge open space with a *large stage*, *professional lighting*, *a well-stocked bar*, and a *beautiful wooden verandah.* **Hosted by Geoff, a super-friendly & experienced actor, improvisor, teacher and event host!** ### TICKETS & ACCESS [RSVP here](https://www.dna-artclub.com/events/improv-lounge) * **Single Session:** €15 * **[DNA. Arts Membership](https://www.dna-artclub.com/membership):** Join our friendly community from €22 and get unlimited access to a full menu of creative workshops all month round. *Ready for a deeper dive? For a more focused improv session, join the [Improv Meet-up](https://www.dna-artclub.com/events/improv-meet-up) with Roby at our other Kreuzberg location [every Sunday at 2:30 PM](https://www.dna-artclub.com/events/improv-meet-up).*

Dear CTO Roundtable Community, I'm happy to share that, outside of our regular event schedule, we're organizing a special CTO Roundtable gathering. This time, we're keeping it simple: **25 seats in a beer garden, no panel, no agenda.** Just a relaxed evening to exchange ideas, discuss challenges, share experiences, and learn from one another as tech leaders. This special event is made possible thanks to our sponsor, **Stephan Schmidt**, founder of **[AmazingCTO](https://www.amazingcto.com/)**. Thank you, Stephan, for making this gathering possible. We're looking forward to spending a summer evening together with great conversations, technology leadership discussions, good drinks, and valuable connections. **Spots are limited to 25 participants**, so be sure to reserve your place early. We hope to see you there! Best regards, Christoph

Head to Mein Freund Harvey, a retro-themed bar specializing in cocktails, and enjoy a curated standup comedy open mic with Berlin's best comedians. Arrive at 7:00 PM and enjoy top-notch spirits, cocktails, and wine before the show. At 7:30 PM, your host will give you pen and paper to write down your secrets (anonymously) for public airing at the end of the show. At 8:00 PM, sit back and enjoy a 60-minute show with no break. The setting is fun, friendly and the bar is perfect for dates and hanging out with friends. Come Laugh With Us! Produced and Hosted by Tyrone Stallone Tyrone is a California native who travels the world and does comedy. Known for his irreverence and quick wit, Tyrone is a favorite in the Berlin scene where people need a laugh, and need to laugh hard. He has opened for comedy greats like Sam Jay, Ari Shaffir, Tom Rhodes and Phil Nichol. Tyrone hosts several shows around Berlin. He has been featured on Vice, Berliner Zeitung, Berliner Kurier and Radio Eins. with GUEST COMEDIANS annouced on IG stories @tyronestallone [https://www.instagram.com/tyronestallone/](https://www.instagram.com/tyronestallone/) MEIN FREUND HARVEY Kulmer Str. 20A, 10783 Berlin, Germany - S/U-Yorckstraße, U-Kleistpark, U-Bülowstraße Cosy, friendly, sophisticated bar with a huge range of whiskies and cocktails. Arrive early to enjoy something special. Non-smoking inside. Seating out front for smoking. Performance space in the back room with a limited capacity of 22, so get your tickets early. CARD PAYMENT ONLY Tickets 10 Euros Purchase Here: www.tyronestallone.com

**This is 100% non-profit. The 15€ sign up fee for everyone is only to minimize last-minute cancellations. The total sum goes to a bar-tap that everyone can use to order drinks until the amount is used up. ‼️NO REFUNDS‼️** **‼️Please don't just show up without RSVPing here and paying the 15€. We have a separate room that has limited capacity and a specific drinks agreement with the bar - so splitting up the bill won't become a mess.‼️** **Small update on how your money get's used from May 2024 onwards:** As of this month, meetup.com has started charging me 34€ instead of 16€ per month. I've decided to distribute this fee evenly among all us participants every month. Example: In the last 12 meetups, the average number of attendees was 17. With 17 attendees I would effectively collect 230€ (after fees). I would now substract 34€ leaving us with 196€ that go to the bar. 15% get's tipped to the wait staff, in this case 30€, leaving us with 166€ effectively to order drinks. Hope everyone is cool with this system. :) Website: https://www.pberg-engineers.me WhatsApp groups: Please come and join us on WhatsApp! \- "PBerg Engineers \- NEWS" \- Only organizers can post announcements or polls \-\> https://chat\.whatsapp\.com/EqMJMmlCZO6LOOfAoG4yTj \- "PBerg Engineers \- DISCUSS" \- Everyone can post \-\> https://chat\.whatsapp\.com/LPuo76J83gF6IZMLUcM4u2 Please join those groups now if you're interested. :) All skill/education-levels welcome! :) Lightning Talks: \- TBD We'll also have a brief "Jobs: Lost & Found section". **Location:** From the street you will have to enter the right hand Cafe Chagall (yes, there are 2). Then, you go upstairs and our private room is in the far end corner of the building. We are a relaxed, non-formal meetup of like-minded software engineers who want to always keep learning and want to meet in physical reality over a drink or two. Prenzlauer Berg, Berlin is home to some of the most talented software engineers in the world, and every month, they come together for an exciting knowledge sharing meetup. This meetup is a chance for attendees to learn from each other, share their experiences, and gain new insights into the world of software engineering. The atmosphere is friendly and welcoming, and the discussions are always engaging and thought-provoking. Whether you're a seasoned veteran or just starting out in your career, you'll find something valuable at this meetup. Don't miss out on your chance to connect with like-minded professionals and advance your knowledge of software engineering. Sign up for the next event now! **Website:** https://www.pberg-engineers.me **WhatsApp groups:** Please come and join us on WhatsApp! \- "PBerg Engineers \- NEWS" \- Only organizers can post announcements or polls \-\> [https://chat.whatsapp.com/EqMJMmlCZO6LOOfAoG4yTj](https://chat.whatsapp.com/EqMJMmlCZO6LOOfAoG4yTj) \- "PBerg Engineers \- DISCUSS" \- Everyone can post \-\> [https://chat.whatsapp.com/LPuo76J83gF6IZMLUcM4u2](https://chat.whatsapp.com/LPuo76J83gF6IZMLUcM4u2) Please join those groups now if you're interested. :)

Join us the first Wednesday of each month for Art O'Clock! A show-and-tell style event for local artists to share a piece of work and answer questions from the audience. Whether it's fine art, performance art, or media productions, we'd love to see what you've been creating. If you are interested in sharing at Art O'Clock, send us a message. We hope to see you there! :)

Hello! I’m organising a coworking + socialising session for all of us who are working on projects (e.g. our own creations, freelance or remote work) but don't feel like sitting alone at home. 🙂 To ensure that we have time for both socialising AND working, we will be using the so-called “Pomodoro” technique: **50 mins deep work** (silent), followed by **10 mins break** to socialise. And then repeat! You are welcome to join whatever your personal background is, and whatever project you are working on. I (the host) speak English and German, so either language is fine. ——————————————————- AGENDA: * **Short Intro** Tell us who you are and share something about what you will be working on today * **Pomodoro Session** \- 3x \(3h\) Each Pomodoro session consists of 50 mins focused “deep work” (no talking, no interruptions, **phones on silent mode**) -> then 10 mins break: a chance to share your progress with others -> Repeat * **15 mins Wrap Up** Celebrate what you achieved and get to know others 😊 ———— Wifi + power plugs are available - but best to bring a fully charged laptop, just in case 🙃 You **do not** have to pay anything. But since we are using the café space, it is common courtesy to buy at least one drink (coffee costs roughly **4 Euros**).

Join us for the **Berlin DevOps Summer Meetup**: our last edition before the summer break! We're excited to be hosted by **Parloa** for an evening of interesting talks, discussions, and networking. There will be food and drinks provided, and plenty of time to connect with fellow DevOps enthusiasts. **📌 Please register at least 24 hours before the event.** We need to share the attendee list with the Parloa office in advance, and **spots are limited**. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **Agenda** 18:30 Open Doors, Networking with Food and Drinks 19:00 Welcome words by Parloa and BLN DevOps team 19:25 **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** 19:50 **The Pipeline Was Green — AI Agents and CI Trust** 20:15 Short Break 20:30 **Managing Uninvited Guests: Securing Open Source Dependencies** 20:55 Networking 21:30 Closing ➡️ Interested in hosting an event? Fill out our [Call for Hosts](https://docs.google.com/forms/d/e/1FAIpQLScBpga8Yp-QAQt2lGskZWOThaKyQ_MbMbZaNcklgeXxqr5Vrg/viewform?usp=sf_link) and let's set up a meeting. \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- *Christoph Ebeling* **Running K8s with AI: Automating** **the SRE Lifecycle with Grafana MCP and GitLab** What does it look like to run 30+ microservices, 8 databases, and a Kafka cluster almost entirely through AI agents? This talk walks through a practical demo of automating the full SRE lifecycle: from incident investigation to deployment validation, using Grafana MCP and the GitLab Agent Platform, and where humans still need to stay in the loop. *Serhii Vasylenko* **The Pipeline Was Green — AI Agents and CI Trust** We’ve spent years building CI/CD pipelines that tell us when code is "technically correct," but are they capable of telling an autonomous AI agent if a change is safe to apply? This talk explores a real-world incident where an AI-powered automation -- pairing Renovate with Claude Code -- successfully executed a "green" pipeline that broke a critical QA cluster for three days, how the team reacted, and how we evolved our vision toward the future of human-agentic collaboration with code. *Frithjof Hoffmann* **Managing Uninvited Guests: Securing Open Source Dependencies** Open source software is the ultimate neighborhood party, but what happens when an uninvited guest slips through the door? This talk digs into the messy reality of dependency hell and its role in software supply chain security: from typosquatting attacks to maintainer account takeovers, and the abandoned projects with known CVEs quietly living in your codebase rent-free.

This interactive workshop offers participants a unique opportunity to actively engage with and reflect upon the possibilities of tomorrow. **Organized in collaboration with [Futurium](https://futurium.de/en)**[,](https://futurium.de/en) the session is designed to be participatory, blending reflection, discussion, and creative hands-on activities. **Location:** **[Futurium](https://maps.app.goo.gl/uqRAq7npeFKubvbu5)**, see the workshop room on the map attached in this event. 📸 We will be documenting the event. However, we will fully anonymize all participants by covering faces with stickers in the final media. If you’d prefer not to be in any shot at all, you are welcome to step away briefly during those moments. **What to expect:** * **Introduction (approx. 20 minutes)** We begin with a journey into the past—examining historical postcards from the 19th and early 20th centuries that depict imagined futures. Participants are invited to explore and discuss these images together, considering what feels surprising, what turned out to be accurate, and how past visions compare to the technologies we know today. **Optionally,** we will also screen a short video featuring young people from 1966 sharing their predictions for the year 2000—offering an additional prompt for reflecting on how future visions are shaped by their historical and cultural context. * **Interactive Exchange (approx. 20 minutes)** Next, participants take part in a guided “opinion swap” exercise using prompt cards. This dynamic format encourages movement, discussion, and the exchange of diverse perspectives within the group—making space for a wide range of voices and viewpoints. * **Creative Activity (approx. 20 minutes)** To close, the group will collaborate on designing an “object from the future.” This hands-on exercise invites participants to imagine possible developments and express their ideas creatively—turning abstract speculation into tangible, shared visions. **About the Organizers:** This workshop is organized by[ Futurium](https://futurium.de/en) in collaboration with the Berlin Neurodivergent Community. Please keep in mind that all of berlin neurodivegrent community organizers are neurodivergent volunteers who contribute their time, energy, and resources to make this event possible. We kindly ask for your patience, kindness, and mutual respect throughout the session—we are here to learn, share, and create together in a supportive environment. We look forward to welcoming you and exploring the future—together!

Chitta Walks is for people whose days move fast, while the mind never fully lands. Thoughts keep looping even when nothing is urgent. The body moves, but attention is elsewhere. Over time, this disconnect drains clarity and ease. This walk is a simple reset. We meet in Berlin’s Tiergarten and walk at a gentle pace. Parts of the walk are in silence, with light guidance and a few short prompts. The walk itself is the practice, bringing body and mind back into the same moment. No apps. No performance. Just a clear space to slow down and notice what is happening. If you want to slow down without withdrawing from life, join a Chitta Walk. ✨ **What to expect (approx. 90 minutes):** * A short arrival and orientation * A guided silent walk (phones off, no conversation) * One concise science-based impulse on attention or stress * Optional reflection in pairs or small groups * A simple takeaway or experiment for daily life 🚶**Who this is for:** * Professionals, creatives, and people in transition. * People who feel mentally busy and want more clarity and balance. * Those curious about mindfulness, but grounded and practical. * Anyone comfortable with silence and gentle self observation. 🔔 **Practical notes:** * Duration: 60-90 minutes * Wear comfortable shoes and weather-appropriate clothing * No prior experience needed * Group size is limited to keep the space quiet and focused 🧭 **Facilitator:** My name is Partha Sarathi, you can call me PS. I have lived in Berlin for over 12 years. With a background in physics and materials science, my interest in mindfulness grew through personal experience with stress and health challenges. I facilitate the space and structure of the walk, inviting shared exploration rather than instruction. 🤔 **Why Chitta Walks?** Chitta is a Sanskrit word referring to the mind or field of awareness, used here in a practical, non-religious sense. Chitta Walks is about noticing how the mind works by slowing down and walking together. Mindful walking makes thought patterns visible in real time, while moving and sensing in the world. The name points to a simple capacity: noticing what is happening in the mind without immediately trying to fix, judge, or optimize it. 🌿 **Possible effects:** A calmer nervous system. Clearer attention. A felt sense of being more present in your body. Subtle insights into how your mind reacts under everyday conditions. A quieter, more grounded way of moving through the city. **Come as you are. Walk. Notice. Leave with a little more space inside.**

This will be the first meetup of the group. A relaxed evening for people interested in bug bounty hunting, web security, AppSec and vulnerability research. The main goal is to meet like-minded people, talk about bugs, tools, targets, methodology, reports, interesting findings and whatever else comes up around security research. Since it is the first event, we can also spend a bit of time discussing how future meetups should be structured: casual chats, hacking sessions, short talks, tool sharing, report discussions or presentations. As soon as at least **3 people join**, I will look for a suitable location. The first meetup will probably be in a **café, bar or restaurant**. If there is enough interest in presentations, I can also look into booking a room with a **TV or projector** for future events. No preparation needed. Please keep everything legal and authorized.

**This event is taking place online.** You write a prompt. You get something back that's almost right, or completely off, or weirdly generic. You tweak it. You try again. Sound familiar? Better prompts aren't about magic phrases, they're about giving the model what it can't guess: who you are, who this is for, what shape the output should take, and what it needs to do. This session shows you the difference on a real example, gives you time to try it on something from your own work, and covers some prompting best practices along the way. 17:00 — Intro & live demo 17:20 — What made the difference? A discussion round 17:35 — Test your own prompt against a shared document 17:50 — What we noticed, what to keep, and where to go next Optional but great: Bring something you've tried to use AI for and hasn't quite landed. Facilitator: Anca Trif Meet Link: https://meet.google.com/mxp-fnzd-ioi

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.

Hi everyone! We're Jared and Petria Walker, local real estate investors based in Columbus, Ohio, with a passion for short-term rentals and hospitality. We're looking to start a casual monthly Columbus-area meetup for entrepreneurs, investors, real estate professionals, and anyone interested in short-term rentals to share ideas, discuss market trends, learn from one another, and build meaningful relationships. Whether you're just getting started or have years of experience, we'd love to connect, collaborate, and grow together. We believe some of the best opportunities begin with great conversations. See you soon!

You can sleep in on the Sesquicentennial (observed), we’re shifting to the following Friday. But join the local UX community for a chat and some biscuits to catch up. If you were in CA for Figma Config, tell us all the lines and you can tell me how I can animate an SVG without coding it by hand, and why I’d even want to. Thanks to the team at Nationwide of supporting the group.

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. 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.

It’s time to take control of your mental health. How do you get rid of stress, anxiety and uncertainty? These emotions are buried deep in your reactive mind. Find out what the reactive mind is, and in the process find yourself. Have you ever suffered from a traumatic experience, a deep loss or been through a painful breakup? Has your ability to communicate suffered as a result? And after that, even though you "moved on" did you find that things were never quite the same? Have you ever looked at childhood photos, or reminisced your early life and wondered where that happiness and spark went? Are your emotions out of your own control? Have you ever felt, even if you aren’t aware of it, that possibly you are getting in your own way of your happiness and success? How does this affect your self-confidence? Find out what is at the root of all stress, anxiety, depression and self-doubt. Find out how and why you hold yourself back from achieving your goals and having the life you have dreamed of. As soon as you learn what is at the root of these unwanted conditions, you’ll see it is something you can DO something about. You will not be labeled or categorized at this MeetUp.

Christians in Tech is a community at the intersection of faith and technology. Our meetups are designed to spark meaningful conversations, promote knowledge sharing, and encourage growth—both in your career and your spiritual walk with God. Whether you're an experienced professional or just starting your tech journey, CIT welcomes you. Our Website [https://linktr.ee/citcbus](https://linktr.ee/citcbus) Sponsors and Partners * Improving (Venue Sponsor) * Bethel World Prayer Center (Fiscal Sponsor) * Fruits & Roots (Coffee Partner)