NixOS

Join us for a C++ meetup, proudly organized by think-cell, on **Wednesday, January 21, 2026**. The event is for C++ engineers eager to learn about "Lightweight: fast yet type safe database access". Connect with fellow engineers and industry experts over pizza and beer in the new year. **Agenda** 18:30 Doors open, snacks & drinks 19:00 Welcome speech by think-cell 19:05 Talks + Q/A 20:15 Pizza and beer, networking 21:30 Farewell **Venue** The meetup will be held at a new location this year. Say hello to [42 Berlin](https://42berlin.de/de/), a vibrant and welcoming space perfect for our gathering. We would like to extend our gratitude to42 Berlin for their generous cooperation in hosting this event. Address: Harzer Str. 42, 12059 Berlin Google Maps: [https://maps.app.goo.gl/tRUZuNqXvCoySysA6](https://maps.app.goo.gl/tRUZuNqXvCoySysA6) **Talk** This talk introduces Lightweight, a new C++ SQL library that aims to provide a user-friendly API while maintaining high performance and type safety. We'll discuss the design philosophy behind Lightweight and the challenges we overcame to create a solution that hides most boilerplate and low-level processes. The presentation will cover the library's iterative development, highlight practical usage examples, and offer an outlook on what's to come, including plans for C++26. **Speaker** **Yaraslau Tamashevich** is a Software Developer at **LASTRADA**, a leading software provider for the construction materials industry. He writes modern C++ code during the day and maintains multiple open-source projects, including a Contour terminal emulator that he attempts not to leave. Before relocation to Berlin, he wrote computational code in Julia to solve nonlinear light–matter interaction problems. He also worked on algorithms for electromagnetic compatibility solutions using C++. **Lightning Talk** *Slint a Modern UI Framework with First-Class C++ Support* by **Olivier Goffart**, **Co-founder at SixtyFPS**. Slint is a modern UI framework for building native applications, with a focus on performance and developer experience. This talk introduces Slint and shows how it can be used through a clean and idiomatic C++ API. We'll also look behind the scenes at how Slint C++ wrapper is made around the Rust implementation, how C++ and Rust interoperate, and how CMake integration is handled so that using Slint from C++ feels natural. **Registration** Seats are limited, so register to secure your spot. We look forward to an evening of technical deep dives and networking with fellow C++ engineers!

(English below) \>\> der Event findet statt\, wenn sich bis 18:00 mindestens 4 Personen angemeldet haben\, sonst nicht << Worum es geht: "Kann ein Walfisch ein Wellensittich sein?" \~> Natürlich nicht, denn Säugetiere sind niemals Vögel. "Kann ein Fenster ein Getränk sein?" \~> Jeder weis, das ist unmöglich, denn Festkörper sind keine Flüssigkeiten. ABER: "Kann eine Demokratie eine Republik sein?" "Kann eine Vermutung eine Meinung sein?" "Ist etwas zu begreifen das Selbe wie etwas zu verstehen?" \~> Tja, jetzt wird's schwierig! Und es wird spannend... Nichts regt dermaßen zum nachdenken an wie dieses neue Gesellschaftsspiel. Die Spielregeln: 1. Jeder schreibt einen Begriff auf einen Zettel. 2. Die Zettel werden paarweise gezogen. 3. Per Beamer werfen wir die Bedeutung der zwei Wörter an die Wand. 4. jeder kann per Laptop (zur Not auch per Smartphone) die Bedeutung ergänzen / editieren, muss dafür ggf. Beispiele angeben warum etwas gleich sein können soll, oder nie gleich sein kann. 5. nach einer Zeit fällt niemandem mehr etwas ein. Unterschiede und Gemeinsamkeiten zwischen den beiden Begrifflichkeiten sind deutlich herausgearbeitet. Dann wird der Punktestand gezählt: (+1) Jeder verbliebene neue Beitrag in der Bedeutung ergibt einen Pluspunkt (-2) aber jeder wieder gelöschte neue Beitrag gibt zwei Minuspunkte. (+5) jede Verbesserung der bisherigen Bedeutung in Reclue ergibt plus 5 Pluspunkte Die Auffassungen aller Mitspieler werden viel klarer, erst recht wenn man häufig mitspielt. Ziel des Spiels ist nicht, dass irgendwer am meisten Punkte sammelt, sondern, dass alle zusammen überhaupt auf mehr als 50 Punkte kommen. Das Spiel funktioniert auch mehrsprachig. Man kann auch von Zuhause aus online mitmachen. Den Zugang können wir dann über die Kommentare hier organisieren. Bring deinen Laptop mit, dann wird es einfacher... Warum macht das Spiel klug? Schach trainiert das Konzentrationsvermögen. Aber es hat mit der Wirklichkeit nichts zu tun. Dieses Spiel hingegen schon, denn genau mitdenken zu können setzt voraus genau zu unterscheiden. Andernfalls assoziiert man das eine sprunghaft mit irgendetwas anderem. Aber ob die Assoziationskette notwendiger Weise der Fall ist, ist nicht klar - und andere Aspekte sind vll. viel wichtiger. Und dann irrt man in wirren Assoziationen, entscheidet wenig optimal, verliert Zeit, usw. Mit der Übung über dieses Spiel nicht mehr! Wer die Bedeutung der Wörter sauber ausdifferenziert wird immer klüger. \*\*\* english version \*\*\* "Can a whale be a parakeet?" \~> Of course not! "Can a window be a drink?" \~> Everyone knows that's impossible. "Can a democracy be a republic?" "Can a conjecture be an opinion?" "Is grasping something the same as understanding something?" \~> Well, now it gets tricky! And it gets exciting... Nothing stimulates thought quite like this new party game. The rules: 1. Everyone writes a term on a slip of paper. 2. The slips of paper are drawn in pairs. 3. We project the meaning of the two words onto the wall using a projector. 4. Everyone can add to/edit the meaning using a laptop or smartphone, and must provide examples of why something could be the same, or could never be the same. 5. After a while, no one can think of anything else. The differences and similarities between the two words are clearly highlighted. Then the score is tallied: (+1) Each new entry adding meaning earns one point. (-2) However, each deleted entry deducts two points. (+5) Each improvement on the existing meaning in Reclue earns five points. The understanding of all players becomes much clearer, especially with frequent play. The goal for the entire group is to reach at minimum 50 points. The game also works in multiple languages. You may join us from home using the internet. Comments in meetup-app will be used to organize that it works. The location (somewhere in Prenzlauer Berg) will be published the day when it takes place.

Hola chicos, Moin zusammen, lasst uns Deutsch und Spanisch sprechen und ein paar Bier zusammen trinken, die Idee ist einfach und gut :) Bitte bringt zumindest basis Deutsch oder Spanisch Kenntnisse mit! Vamos a hablar español y alemán y tomar unas cervezas, la idea es simple y buena jaja. ¡Por favor, ven por lo menos con un nivel básico de español o alemán! Danke, gracias!

Welcome to the PyData Berlin January meetup! We would like to welcome you all starting from 18:30. There will be food and drinks. The talks begin around 19.15 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**: **Spiced Academy** is excited to welcome you to this month's version of PyData. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* The Lineup for the evening **Talk 1: From Grape Stomping to Gorilla Trekking: AI-Driven Discovery of Novel Interests at GetYourGuide** **Abstract**: UX research shows that discovering new, unexpected and unique things to do in a destination is among the most important needs for travelers. However, surfacing these “hidden gems” at scale is a major challenge for any dynamic marketplace. At GetYourGuide, we tackled this by combining large language models, semantic vector embeddings, and a robust human-in-the-loop process to automatically identify and categorize novel customer interests. Join me as I dive into how we created this AI-driven solution and how we achieved scalable, granular and relevant categorization of our activities. **Description:** How do you help a traveler find something they never knew they wanted? In this talk, I will explore the exciting journey of developing an AI-driven solution to identify novel customer interests at GetYourGuide. With thousands of new activities onboarded weekly, manual categorization became impractical, prompting the need for automation. This talk will walk you through our end-to-end solution: * The problem: the challenges travelers face in discovering relevant and unique experiences, the organizational complexity of this on our platform and its business impact * The AI journey: From raw LLM-based extraction to vector embeddings, clustering, all the way to a robust human-in-the-loop pipeline. I’ll share how we iterated from noisy prototypes to an impactful system, launching 300+ new interests and driving significant engagement and net revenue uplifts * What we learned: The realities of working with LLMs in production-like settings, more specifically hallucinations and issues with relevance, granularity and semantic deduplication. We found out that the line between useful innovation and unwanted noise can be surprisingly fine when using LLM’s. I’ll share practical examples of these challenges and how we addressed them. * Impact and future directions: How we achieved a 10x increase in manual acceptance of AI-suggested interests in just two iterations, and what’s next for AI-driven discovery at GetYourGuide **Bio**: **Morena Bastiaansen** holds a master’s degree in Econometrics from the University of Amsterdam and currently works as a Data Scientist at GetYourGuide in Berlin. She combines her passions for machine learning, language, and travel to build impactful systems for travelers worldwide, with a current focus on personalization in email marketing. Morena is also actively involved in the local tech and ML community. **Talk 2: Deep dive into data streaming security** **Abstract**: Data streaming is powering everything from fraud detection and real-time analytics to patient monitoring and order fulfillment. But as the role of streaming grows, so does the risk - because many streaming platforms, like Apache Kafka, aren't secure by default. In this talk, we’ll take a practical look at data streaming security through the lens of Kafka, one of the most widely adopted streaming platforms in the world. We'll walk through what can go wrong - real examples of exposing 14M patient-doctor messages, or years of real-time delivery info to the internet - and what it takes to do it right. We'll cover the key pillars of securing a streaming system: encryption in transit and at rest, access control, monitoring, and key management. Along the way, we’ll look at the trade-offs like disk encryption vs. end-to-end encryption, what is behind field-level and envelope encryption, and the realities of using customer-managed keys in regulated industries. We'll also explore how streaming security has evolved, how real vulnerabilities (like CVE-2019-12399) highlight the need for patching and monitoring, and what successful multi-layered security looks like in production - from financial institutions to healthcare platforms. If you're building, running, or scaling streaming systems, this talk will help you see the security blind spots and give you concrete steps to protect the data flowing through your pipelines. **Bio**: Olena Kutsenko is a Staff Developer Advocate at Confluent and a recognized expert in data streaming and analytics. With two decades of experience in software engineering, she has built mission-critical applications, led high-performing teams, and driven large-scale technology adoption at industry leaders like Nokia, HERE Technologies, AWS, and Aiven. A passionate advocate for real-time data processing and AI-driven applications, Olena empowers developers and organizations to use the power of streaming data. She is an AWS Community Builder, a dedicated mentor, and a volunteer instructor at a nonprofit tech school, helping to shape the next generation of engineers. As an international speaker and thought leader, Olena regularly presents at top global conferences, sharing deep technical insights and hands-on expertise. Whether through her talks, workshops, or content, she is committed to making complex technologies accessible and inspiring innovation in the developer community. **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 \*\*\*

**IMPORTANT PLEASE RSVP AT:** https://www.meetup.com/pydata-berlin/events/312771201/ \*\*\* We would like to welcome you all starting from 18:30. There will be food and drinks. The talks begin around 19.15 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**: **Spiced Academy** is excited to welcome you to this month's version of PyData. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* The Lineup for the evening **Talk 1: From Grape Stomping to Gorilla Trekking: AI-Driven Discovery of Novel Interests at GetYourGuide** **Abstract**: UX research shows that discovering new, unexpected and unique things to do in a destination is among the most important needs for travelers. However, surfacing these “hidden gems” at scale is a major challenge for any dynamic marketplace. At GetYourGuide, we tackled this by combining large language models, semantic vector embeddings, and a robust human-in-the-loop process to automatically identify and categorize novel customer interests. Join me as I dive into how we created this AI-driven solution and how we achieved scalable, granular and relevant categorization of our activities. **Description:** How do you help a traveler find something they never knew they wanted? In this talk, I will explore the exciting journey of developing an AI-driven solution to identify novel customer interests at GetYourGuide. With thousands of new activities onboarded weekly, manual categorization became impractical, prompting the need for automation. This talk will walk you through our end-to-end solution: * The problem: the challenges travelers face in discovering relevant and unique experiences, the organizational complexity of this on our platform and its business impact * The AI journey: From raw LLM-based extraction to vector embeddings, clustering, all the way to a robust human-in-the-loop pipeline. I’ll share how we iterated from noisy prototypes to an impactful system, launching 300+ new interests and driving significant engagement and net revenue uplifts * What we learned: The realities of working with LLMs in production-like settings, more specifically hallucinations and issues with relevance, granularity and semantic deduplication. We found out that the line between useful innovation and unwanted noise can be surprisingly fine when using LLM’s. I’ll share practical examples of these challenges and how we’re iterating to address them. * Impact and future directions: How we achieved a 10x increase in manual acceptance of AI-suggested interests in just two iterations, and what’s next for AI-driven discovery at GetYourGuide **Bio**: **Morena Bastiaansen** holds a master’s degree in Econometrics from the University of Amsterdam and currently works as a Data Scientist at GetYourGuide in Berlin. She combines her passions for machine learning, language, and travel to build impactful systems for travelers worldwide, with a current focus on personalization in email marketing. Morena is also actively involved in the local tech and ML community. **Talk 2: Deep dive into data streaming security** **Abstract**: Data streaming is powering everything from fraud detection and real-time analytics to patient monitoring and order fulfillment. But as the role of streaming grows, so does the risk - because many streaming platforms, like Apache Kafka, aren't secure by default. In this talk, we’ll take a practical look at data streaming security through the lens of Kafka, one of the most widely adopted streaming platforms in the world. We'll walk through what can go wrong - real examples of exposing 14M patient-doctor messages, or years of real-time delivery info to the internet - and what it takes to do it right. We'll cover the key pillars of securing a streaming system: encryption in transit and at rest, access control, monitoring, and key management. Along the way, we’ll look at the trade-offs like disk encryption vs. end-to-end encryption, what is behind field-level and envelope encryption, and the realities of using customer-managed keys in regulated industries. We'll also explore how streaming security has evolved, how real vulnerabilities (like CVE-2019-12399) highlight the need for patching and monitoring, and what successful multi-layered security looks like in production - from financial institutions to healthcare platforms. If you're building, running, or scaling streaming systems, this talk will help you see the security blind spots and give you concrete steps to protect the data flowing through your pipelines. **Bio**: Olena Kutsenko is a Staff Developer Advocate at Confluent and a recognized expert in data streaming and analytics. With two decades of experience in software engineering, she has built mission-critical applications, led high-performing teams, and driven large-scale technology adoption at industry leaders like Nokia, HERE Technologies, AWS, and Aiven. A passionate advocate for real-time data processing and AI-driven applications, Olena empowers developers and organizations to use the power of streaming data. She is an AWS Community Builder, a dedicated mentor, and a volunteer instructor at a nonprofit tech school, helping to shape the next generation of engineers. As an international speaker and thought leader, Olena regularly presents at top global conferences, sharing deep technical insights and hands-on expertise. Whether through her talks, workshops, or content, she is committed to making complex technologies accessible and inspiring innovation in the developer community.

We are kicking off the year by celebrating 2 years of Berlin Cybersecurity Social and starting strong with two highly practical sessions focused on impact, growth, and doing more with less. As budgets tighten and expectations rise, security leaders are being asked to optimise spend while also advancing their own careers. This anniversary edition of BCS is all about exactly that. How to make smarter security decisions, stretch limited resources, and make sure your work gets the recognition it deserves. Think new year, new priorities, and new momentum. *** **Talk 1: Why Risk Appetite Statements Matter: Getting the Board Onboard** James Tucker, Group Head of Information Security at Awin Global This session explores how risk appetite statements can be used to connect technical security controls to board-level decision-making. James will share how framing security through risk appetite enables clearer conversations about prioritisation, investment, and trade-offs, particularly when budgets are tight. **Key Takeaways** * How to use risk appetite statements to frame security decisions * How to translate technical controls into business and board-level language * How to support risk-based investment and prioritisation discussions * **Talk 2: Making Invisible Security Work Visible** **Alisa Reznik, COO, tech consultant, and mentor for tech leaders** Security professionals protect the company constantly, yet their impact is often invisible by design. In this session, Alisa will show how to make security work visible without bragging, translate technical outcomes into business value, and build career momentum alongside fast-moving threats. **What you will learn** * How to make your work visible without bragging * A simple system to gain recognition and career momentum * How to communicate security impact in business terms *** We will be celebrating the 2-year anniversary of Berlin Cybersecurity Social with networking before and after the talks, familiar faces, new connections, and the same community energy that has shaped BCS from the start. A practical start to the year. Smarter budgets. Clearer impact. Stronger careers. **About Berlin Cybersecurity Social:** This meetup is open to cybersecurity professionals of all levels, from beginners to experts. Whether you're a seasoned pro or just starting your journey in the field, this event is the perfect opportunity to connect with others who share your passion for cybersecurity. **About** **James Tucker:** James is Group Head of Information Security at Awin Global, where he leads global security strategy across cloud, infrastructure, and enterprise environments. With a background spanning hands-on network security, incident response, and executive security leadership, James brings a pragmatic, business-focused approach to building effective security programs at scale. **About** **Alisa Reznik:** Alisa is a COO, tech consultant, and mentor for technical leaders. She helps engineers and security professionals gain visibility, advance their careers, and build work lives aligned with what they actually want. With experience leading engineering and product teams under pressure, Alisa brings a practical perspective on influence, impact, and growth in technical roles.

English, see below. *** Willkommen beim Bitcoin Meet-up im Café Holzmarktperle (Holzmarktstraße 25). Die Berliner Community kann einfach nicht genug davon bekommen über Bitcoin zu reden. :) Deshalb bieten wir dieses Meet-up als weitere Option neben dem etablierten “Berliner Bitcoin-Stammtisch @ Friedel Richter” an. Jeder ist willkommen - Bitcoin-Anfänger, Enthusiasten, etc. Wir freuen uns auf den gemeinsamen Austausch mit anderen Plebs in lockerer Runde und gemütlicher Atmosphäre und beantworten auch gerne eure Fragen. Natürlich könnt ihr im Café mit Bitcoin ₿ / Lightning ⚡bezahlen. Dies ist der richtige Ort für Menschen, die glauben, dass Bitcoin die Welt verändern kann und Teil der nächsten großen Revolution in der Finanzwelt sein wird. *** Welcome to the Bitcoin meet-up at Café Holzmarktperle (Holzmarktstraße 25, Berlin). Since we can’t get enough of talking Bitcoin we are offering this meet-up as a another option in addition to the established Berliner Bitcoin-Stammtisch @ Friedel Richter. Everyone is welcome - Bitcoin beginners, enthusiasts, … you name it. We are always happy to meet with other plebs, teach, talk and help! Payment in Bitcoin ₿ / Lightning ⚡accepted! This is the place to be for people who believe that Bitcoin will rock the world and will be part of the next big revolution in the financial world.

**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, our main topic is going to be dependency-tree security. Jan-Erik will share insights into how security is upheld at Mozilla — in the Firefox project — in the context of third party open source library packages and repeated attempts at attacks through malicious crates. 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). 22 January 2026 is our tenth 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 * 11 Jun 2026 * 9 Jul 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!

**PLEASE ALWAYS CHECK THEIR REPECTIVE WEBSITES! Sometimes they cancel events and you don't want to go there for nothing.** This Contact Jam happens every friday. Entry is 4€ depending if there is live music. https://a248.e.akamai.net/secure.meetupstatic.com/photos/event/7/5/1/7/600_455309975.jpeg It's a nice longish room with a dance floor. There is live music on every 1st, 3rd & 5th friday. And a silent jam on every 2nd & 4th friday. Their Homepage (http://www.phynixtanzt.de/m_einstieg.html#freitags)

In our January meetup [Alexander Shabalin](https://github.com/projedi) will talk about the LLVM-based backend in Kotlin and its tracing garbage collector. Alexander is a software engineer at JetBrains who works on Kotlin/Native. Kotlin/Native is one of the backends of the Kotlin compiler. It uses LLVM for code generation and it features a tracing garbage collector. The GC integration is custom and currently doesn't rely on LLVM GC extensions. In this talk we'll take a look at some Kotlin code, the LLVM code generated for it and the reasons behind it. Small snacks and drinks will be available. There is always space for outside topics and discussions. If you have specific questions, please bring them. Looking forward to meeting everyone again!

Open Source Frühstück: enjoy food and deep technical talks Open your day with a solid breakfast and practical discussions on **Apache Kafka**, **ClickHouse**, **PostgreSQL** and much more. Enjoy a session designed for data engineers, architects and technical decisions-makers like you, who want to address the challenges they face in data-infrastructure. No high-level pitches but straight into practical discussions on how to build scalable, efficient open sourced-powered data platforms. What's on the menu (other than a delicious breakfast): * **Deep dives** into new features and upcoming technical roadmaps, including **Aiven Inkless**, **Kafka,** **Apache Iceberg**, **OpenSearch**, **PostgreSQL**, and **ClickHouse** * **Real case studies** demonstrating how top engineering teams are solving core data problems with these stacks, including search, observability, and analytics use cases powered by OpenSearch. * **Optimization techniques** for performance, cost-efficiency, and operational simplicity. So what are you waiting for? Secure your seat now!

Jeden Monat gibt es den thematischen Brettspielabend an dem wir vorwiegend etwas längere Kennerspiele zu einem bestimmten Thema spielen werden. Etwas Erfahrung mit Brettspielen solltet ihr deshalb schon mitbringen. Ein paar Spiele bringen wir immer mit, ihr seid aber gerne dazu eingeladen eure eigenen Lieblingsspiele mitzubringen. Falls ihr keine eigenen Spiele besitzt, gibt es mittlerweile in allen städtischen Bibliotheken eine gute Spieleauswahl. Spiele die z.B. auf den Tisch kommen: Flügelschlag, Dune Imperium, Die Weisse Burg, Harmonies, 7Wonders Auf Grund des begrenzten Platzes meldet euch bitte per Email an. Das aktuelle Monatsthema könnt ihr auch per Email erfragen: [meeplemoabit@gmx.de](mailto:meeplemoabit@gmx.de) Eintritt und Getränke auf Spendenbasis.

Hi, dieses Mal besprechen wir "Das grüne Haus" von Mario Vargas Llosa (1976). Hier der Link zum Inhalt und Buch : https://www.suhrkamp.de/buch/mario-vargas-llosa-das-gruene-haus-t-9783518368428 Wir treffen uns diesmal im Cafe Tirree nahe der U-Bahn Station Turmstraße :)

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.

Dulles Code & Coffee is a collaborative community of software and technology enthusiasts seeking to learn, grow, and help each other. All skill levels are welcome. The concept is simple. Bring a laptop and ideas. We’ll provide coffee, tea, and donuts. Thank you to [BTI360](https://www.bti360.com/) for sponsoring this event. ## **Event Format** 1. At 9:15 everyone introduces themselves and briefly describes what brought them out this morning (project, homework, networking, etc.). 2. For the rest of the day folks work in the communal space, socializing and asking/giving help as desired. ## **Location** BTI360’s Office in Herndon The office is across from Worldgate, looking down on the toll road. ## **Address** 12930 Worldgate Dr, Ste 400, Herndon, VA 20170 [[map](https://goo.gl/maps/pF5ZrPUviX1vtmdSA)] ## **Logistics** * **Must be a U.S. Citizen to attend. Real ID verification is required.** * PARKING: Use the surface lot. All spaces marked MIII are open for parking. Please avoid Management spaces, State Farm and SP+ * ARRIVAL: Follow the signs from the front entrance to the freight elevator located in the parking garage on level P2. Take the elevator to Suite 400 (Floor 4). * How to find us video: [https://youtu.be/ohqFzyqiASE](https://youtu.be/ohqFzyqiASE) ## **Community Guidelines** We value the participation of each member of the community and want all attendees to have an enjoyable and fulfilling experience. To ensure a conducive environment, all participants are required to conform to our [code of conduct](https://github.com/DullesCodeCoffee/.github/blob/main/code-of-conduct.md).

Essential oils support the body in its healing work. Symphony of Cells (SOC) is a collection of 21 essential oil applications that target a different body system. Applying the oils to the back and the feet is selected because of the large number of nerve endings along the spine and on the bottom of the feet. Nourishing the nerve endings helps to feed all the organs and glands of the body. Essential oils are natural plant oils obtained from different parts of the plant and easily recognized and used by the body to help achieve balance and assist in cleansing of foreign substances. SOC was created by Boyd Truman, a DoTERRA Wellness advocate, to create physical, emotional and spiritual journey within the body. Receive a SOC Essential Oil Healing Experience Session. Please Note: The SOC Essential Oil Experience Session is by appointment only. Message by 8pm the day prior to the event to reserve a time slot. To schedule your session please contact Joyce at (703) 395-5151.

**Ready for a night of bold flavors and good company? 🌭🍕** Skip the kitchen and join your DTs family and friends for a fun-filled dinner at **[Kook Dogg Cafe!](https://www.kookdoggcafe.com/)** After our Thursday night Happy Hour, let’s head over for some delicious **artisan pizzas, mouthwatering sandwiches, and unique eats** at **12100 Sunset Hills Rd R-6, Reston, VA 20190**. Whether you're craving a crispy flatbread, a loaded sandwich, or something totally unexpected, Kook Dogg has something for everyone! Please **RSVP on our Facebook and Meetup pages** so we can give the restaurant a heads-up on how many hungry DTs to expect! We usually have a group of **12-20**, but the more, the merrier! Walk-ins are welcome, but reserving your spot helps us plan better. We’re always switching up the dinner spots for variety, so keep an eye out for **next week’s location**—because every **Thursday brings something new to the table! 🍽️**

Does your soul need a little boost on Tuesday? it's important to continue our healing/self growth journeys and build support for one another through our community. I know first hand how important it is to have people you can share and talk to along this journey. Many people don't understand it and think you are crazy. We know better, and we know we are making huge improvements in our lives. However, if you don't have support and feel alone, you could just give up. That would be a shame, so with this in mind, we will meet and explore many different parts of spirituality. This will be a free form experience, and will change according to the energy and preference of the group. Some nights we might do a meditation, some I might do some Access Healing work. Other ideas might include: Chanting, card readings, manifesting, visualizations, book discussions, crystals, affirmations, chakras, writing, past lives, Angels, coloring, clearings, astrology, mudras, nutrition and general discussions to raise your consciousness - the list is endless! We will also have guest hosts from time to time to learn about other topics under this huge umbrella! Join us to get your weekly dose of good energy, and we will all rise together! When we do, it has a ripple effect throughout our community and our whole planet! Yes, you do matter and what you do and think makes a big difference in the world! I can't wait to grow with you! We are flexible, we will start about 6:30, but if you can't get there then, join us whenever you can. This is a love based FREE event to support and help you soar, but DONATIONS are appreciated!

Come join us at Nova Labs for our monthly lockpicking meeting! We meet every third Wednesday at the Nova Labs Fairfax location at 3850 Jermantown Road. Learn about locks, lockpicking, lock modifications, and even lock smithing in our classroom environment. No tools, skills, or knowledge required, but feel free to bring any of those things with you! Our meetings are overseen by one or more locksmiths.

Qigong literally means life energy cultivation. With roots in Chinese medicine, philosophy, and martial arts, it is a moving meditation practice that balances and activates the Qi (chi) or life force in the body. Qigong combines physical postures, breathing techniques, and focused intentions. The practices can be classified as martial, medical, or spiritual. It is a highly effective health care practice, many report improvements in physical or mental ailments as well as connecting to their true inner nature. Blood and Qi have a very close relationship. Blood is said to be a denser form of Qi, and more Yin in nature. Qi generates, moves and holds the blood, while Blood nourishes the Qi. The gentle, rhythmic movements of Qigong reduce stress, build stamina, increase vitality, and enhance the immune system. It has also been found to improve cardiovascular, respiratory, circulatory, lymphatic and digestive functions. One of the more important long-term effects is that Qigong reestablishes the body/mind/soul connection. When these three aspects of our being are integrated, it encourages a positive outlook on life and helps eliminate harmful attitudes and behaviors. It also creates a balanced life style, which brings greater harmony, stability, and enjoyment! “If you want to LIVE TO BE 100, learn Qigong!” – Dr. Mehmet Oz, Contributor to Oprah Show And, speaking of age, anyone can do Qigong, from 5 year olds to 95 year olds! Any body shape or condition as well can be improved. If you can’t stand for very long, you can see results from doing Qigong while sitting. There was even a case of a person who made great improvements doing Qigong while lying in their bed! Jacqui has been practicing diligently, and is now a Certified Instructor by the Supreme Science Qigong Center in the Level One Healing Form. Come join us at Rising Phoenix. Only $15.00 a class! We are so excited to show you how to follow the Qi! Please RSVP by 8 AM on the day of class. You can RSVP here on Meetup, or call us at 703-257-7522.

What's better than brunch? Brunch with the LGBTQ+ community, of course! Join the Dulles Triangles at 11:00 AM for a dazzling brunch at **[Amphora Diner](http://amphoragroup.com/amphoras-diner-deluxe/)**, located at **1151 Elden St, Herndon, VA 20170**. This is your chance to catch up with old pals, make some new ones, and bask in the glory of a Sunday well-brunched! Amphora’s menu is as diverse as our community, offering everything from omelets and pancakes to divine bakery treats. Seriously, their pastries are more irresistible than a shirtless Ryan Gosling holding a puppy! **RSVP Required!** Amphora needs a headcount beforehand, and adding seats at the last minute is like trying to squeeze into last year’s pride outfit—tricky! To ensure you get a seat at the brunch extravaganza, RSVP on Meetup or in the Dulles Triangles Facebook group by the day before. Those who RSVP get priority seating, and we promise not to judge if you show up in sequins. Remember to ask for Dulles Triangles when you arrive. Use the links below to RSVP and secure your spot faster than you can say "mimosas." This event is usually held on the first Sunday of each month, but check for updates because we like to keep things as flexible as our dance moves. Keep an eye on the current schedule so you don't miss out!