Java Concurrency

Kom naar het HaHaHo Makers Lab Utrecht voor een avond vol kennis & ervaringsdelen en maken, met de focus op elektronica met microprocessoren zoals Arduino & Raspberry Pi, LED’s en meetapparatuur. 19:00 Inloop + opzetten apparatuur 19:45 Standup: wat wil iedereen doen en/of leren deze avond? 20:00 Parallelle activiteiten: – startactiviteiten voor nieuwe deelnemers (Arduino, soldering, meetapparatuur, etc.) – onderlinge kennisuitwisseling adhv de wensen uit de standup – werken aan het gezamenlijke [PraatPaal-project](https://github.com/hadoopmarc/hahaho-interactive-pole) – werken aan je eigen project – ordenen/markeren van de ladenkasten met elektronisch componenten 21:30 Start met opruimen 21:45 Einde en verlaten van de Bibliotheek Wij zijn meestal met een groep van een kleine tien (er is ook nog een whatsapp aanmeldingslijst). Een laptop is niet noodzakelijk maar komt vaak van pas! We vragen een vrijwillige donatie van €5,55 per avond om de inventaris met apparatuur en elektronische componenten op peil te kunnen houden. English 19:00 Room available for setting up equipment 19:45 Standup: what are the participant’s plans and wishes for the evening? 20:00 Parallel activities: – starter activities for new participants (Arduino, soldering, measuring equipment, etc.) – sharing knowledge as follow-up on the plans and wishes expressed during the standup – working on the community [Interactive Pole project](https://github.com/hadoopmarc/hahaho-interactive-pole) – working on your individual project – sorting the chest of drawers with electrical components 21:30 Start decluttering the room 21:45 End: leave the Public Library Most evenings see a group of about 10 people (there is an additional whatsapp list). Bring your laptop if you want to program microcontrollers! We ask for a voluntary donation of €5,55 per evening to maintain the inventory with equipment and electrical components.

***English invitation*** You are invited to visit the Dutch Deventer Toastmasters. Toastmasters is an organisation where you can develop your public speaking and leadership skills in a safe, positive and inspiring environment. It grows your self confidence and gives your energy a boost. Want to visit us? Send an email to deventertoastmasters@gmail.com ***Nederlandse uitnodiging*** Je wordt van harte uitgenodigd om onze Nederlandse bijeenkomst te bezoeken bij Deventer Toastmasters. Toastmasters is een organisatie waar je je vaardigheden op het gebied van spreken in het openbaar en leiderschap kunt ontwikkelen. Dit doen we in een veilige, opbouwende en inspirerende omgeving. Je zelfvertrouwen groeit en je energie krijgt een boost. Wil jij meedoen? Stuur een email naar Deventertoastmasters@gmail.com

**Hey fellow AWS enthusiasts! ✨** This evening we'll takle our AWS costs! 💪🏻💸 We are happy to have **[Meisi Zhan](https://www.linkedin.com/in/meisi-z-52702b61/),** a Customer Facing Cloud Engineer @ codecentric, joining to walk us through **FinOps in Action with AWS Spot Instances**. Thanks to our friends at **[codecentric Nürnberg](https://www.codecentric.de/standorte/nuernberg)** for sponsoring the event with food and drinks and opening their wonderful offices for us! **📆 Tonight's Agenda** 19:00 - Welcoming **19:15 - Talk by Meisi followed by Q&A and knowledge sharing** 20:00 - Food, Drinks & Networking Looking forward to seeing you 👋🏻 **[Nora](https://www.linkedin.com/in/nora-schoener/)** & **[Frank](https://www.linkedin.com/in/frankprechtel/)** \-\-\- The talk ⤵️ **FinOps in Action: Real-World Cost Optimization using AWS Spot Instance** The talk is about our AWS funded PoC project, this project demonstrates the implementation of FinOps principles by leveraging AWS Spot Instances to achieve significant infrastructure savings without compromising workload performance. It provides a technical blueprint for orchestrating Spot Fleets and Auto Scaling groups, offering a practical approach to data-driven cloud financial management. The speaker⤵️ **Meisi Zhan** is a distinguished Customer-facing Cloud Consultant and Evangelist at codecentric, bringing over eight years of expertise in IT consulting and software engineering. As a highly experienced Pre-Sales Engineer and Solution Architect, she has a proven track record of building trusted advisor relationships and driving customer success across multi-cloud environments, including AWS, Azure, and GCP. Meisi excels at translating complex technical challenges into quantifiable, TCO-justified business value and viable technical architectures. Her approach focuses on Transformation Consulting, DevOps, and FinOps, ensuring that cloud-native solutions are both innovative and financially optimized. Get in Contact with Meis through [LinkedIn](https://www.linkedin.com/in/meisi-z-52702b61/). \-\-\- **Please note:** At the event, photos and videos will be taken for marketing purposes both by our hosts and our location sponsors. We try to offer a hybrid experience by providing a video stream of the talk. There will be no recording published after the event. Please also keep in mind, that we try our best effort to provide a good streaming experience. We don't offer a professional stream, so delays, technical issues or other interference are a matter to be tolerated.

If you are living in The Netherlands, by now, you may well have noticed the amount of open water. If you enjoy cycling in the city, you may wish to feel safer as you navigate the bridges and canals. And you may also want to get ready for visiting the beach, pools or the many lakes this summer. Learning how to swim takes approx 1 year and it all starts with the very first lesson. New comers enroll via our website and pay € 30,50, this is the first lesson and a goody bag. After the class you agree with the personal swim coach how to continue to obtain your final objectives. Enrolling is only possible via [www.your-personal-swim-coach.nl ](https://www.your-personal-swim-coach.nl/)hence a rvsp via meetup is not enough.

A great ride along the Vecht and Gein rivers. You will love this route. Please ride single file along the winding river as there can be cars around each corner. **Route:** https://connect.garmin.com/modern/course/441606271 GPX: https://drive.google.com/file/d/17-T_pT_GH3QKSFcH1WWgfArvxSdAkVzO/view?usp=sharing **Afterwards:** Drinks at Polder https://maps.app.goo.gl/tbt5DDG7YLU3uWvaA **Rules:** \- Download the route to your cycling computer so you can always find your way home \- Make sure to arrive on time \- Before you ride\, decide as a group how you want to ride: you can split up in a fast and a slow group or stay together\, but make sure to discuss what pace you are going to ride and whether you are going to wait if someone is slower than the group\, or not\.

Samen sporten, gewoon voor de fun, elke week een divers programma, met allerlei verschillende sporten. Je hoeft niet de beste te zijn, maar wel zin hebben om samen te spelen en te leren. Tijdens een training doen we verschillende spelletjes, basketbal, voetbal. volleybal, spikebal, honkbal. Kom je ook, de bal ligt bij jou!! Eerste keer meedoen is altijd gratis, daarna kan je beslissen of dit voor jou is, of niet!! Dus kom een keer proberen. Kan je niet op deze dag, we sporten ook op andere dagen nl Zondag om 9:30 of Maandag om 20:30 Stuur mij een berichtje als je op die dagen een keer wil proberen! The amount of people rsvp'd to this game doesn't match the real number of people at the event, as Meetup is only used for promotion purposes.

Welcome to the age of the Agentic Stack, where we bridge the gap between deterministic engineering and the new frontier of autonomous systems. We’ll explore how to build AI agents that fulfill the security, reliability, and automation requirements for the enterprise, and how the entire Software Development Life Cycle (SDLC) is being rebuilt from the ground up by agentic IDEs. **THIS MEETUP will be in ENGLISH and HYBRID\. \|** Zoom Link is visible for remote attendees after registration. **\*\*\* AGENDA \*\*\*** * 6:30\-7:00 PM \| Doors open\. Grab some snacks & drinks\. * 7:00 PM \| Welcome & Intro **Start of the hybrid meetup** * 7:05 PM \| **The Software Development Life Cycle (SDLC) in the age of AI Agents** by Harald Seipp (Principal Client Engineering EMEA Solution Architect & STSM at IBM) & Thomas Südbröcker (Senior Engineer and Solution Architect at IBM) * around 8:05 PM \| **Mastering Multi-Agent Systems with the Agentic Layer** \- Florian Mallmann \(Senior Software Engineer at QAware\) * afterwards: More snacks & drinks, and a lot of time for networking with all attendees and speakers. **\*\*\* ABSTRACTS \*\*\*** **The Software Development Life Cycle (SDLC) in the age of AI Agents - Harald Seipp (Principal Client Engineering EMEA Solution Architect & STSM at IBM) & Thomas Südbröcker (Senior Engineer and Solution Architect at IBM)** This session explores how agentic AI is reshaping every phase of the Software Development Life Cycle (SDLC), transforming development workflows from requirements gathering to maintenance. Using IBM’s perspective on agentic IDEs, the presentation demonstrates how AI‑driven tools can autonomously understand context, plan and execute multi‑step tasks, generate code and tests, refactor across entire codebases, and assist in deployment and troubleshooting. Attendees will learn how these capabilities reshape developer roles, accelerate solution workshops and pilot builds, and enable teams to deliver more with fewer resources. Risks, best practices, and the evolving future of autonomous SDLC pipelines are also discussed, offering a pragmatic view of how to adopt agentic development responsibly and effectively. If time permits, we can also provide a brief look at agentic Ops, including a Kubernetes cluster administration live demonstration. **Mastering Multi-Agent Systems with the Agentic Layer - Florian Mallmann (Senior Software Engineer at QAware)** The software landscape is undergoing a paradigm shift. Agentic AI. While microservices operate deterministically, AI agents act probabilistically and often unpredictably, making them autonomous. This presents a significant challenge for platform engineers and DevOps teams. In this talk, we will demonstrate how our open source [Agentic Layer](https://github.com/agentic-layer) helps to develop agents that meet high enterprise standards for security and reliability. We will showcase a live demonstration of three critical pillars for robust AI development: * **Workload Orchestration:** Discover how we define modular agent logics and chain them together to create highly efficient, scalable workflows. * **Quality Plane (Testability):** Say goodbye to the "prompt lottery." We will demo how to implement automated test cases that make the output quality and logical correctness of your agents objectively measurable. * **Compliance Plane (Guardrails):** See "security through technology" in action. We'll show you how to write and deploy real-time guardrails that prevent personally identifiable information (PII) leaks and ensure strict adherence to regulatory requirements. Whether you are building your first agent or scaling an existing system, this live demo will give you practical insights into deploying safe, predictable, and high-performing AI applications. \*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\* Please note that photos are taken during the meetup. If you do not want to appear in the photos, please contact the meetup team at the beginning of the event. \*\*\* Während unserer Meetups werden Fotos aufgenommen. Falls du nicht auf den Fotos erscheinen möchtest, sprich bitte zu Beginn der Veranstaltung mit unserem Meetup Team.

**Um was geht es dieses mal?** **Barrierefreiheit automatisiert testen - Anna Maier (codecentric)** "Barrierefreiheit – ein Produkt für alle nutzbar machen - ist ein komplexes Thema. Bei der Entwicklung barrierefreier Software müssen viele Anforderungen berücksichtigt werden. Ein großes Problem ist, dass das Testen ein weitgehend ein manueller Prozess ist. Das kollidiert mit den schnellen Veröffentlichungszyklen moderner Software. Wie können wir unser Tempo beibehalten und gleichzeitig sicherstellen, dass das Produkt zugänglich bleibt? In diesem Vortrag gebe ich euch das Handwerkszeug, um euch in Hinblick auf Barrierefreiheit besser abzusichern. Dabei lernen wir zunächst automatische Tools und ihre Möglichkeiten und Grenzen kennen. Danach schauen wir auf Strategien zum Schreiben eigener Tests mit gängigen Testframeworks. Abschließend schauen wir uns an, wie KI uns in dieser Hinsicht unterstützen kann" **Hybrides Setup!** Wir freuen uns, euch bei uns in den Räumen der codecentric AG in Dortmund willkommen zu heißen. Vor Ort versorgen wir euch mit Snacks und Getränken und freuen uns gleichzeitig über interessante Diskussionen und einen guten Austausch. Für alle, die es nicht zu uns ins Office schaffen, werden wir das Meetup Hybrid durchführen. Der Stream beginnt ca. 10 Minuten später, damit wir vor Ort ausreichend Möglichkeit für persönliches Kennenlernen haben. Den Live-Stream findet ihr auf dem [YouTube-Channel](https://www.youtube.com/@codecentricAG) der codecentric AG. **Wichtig - Absage bitte rechtzeitig:** Wir bestellen das Essen bereits 3 Tage vor dem Meetup. Falls ihr doch verhindert sein solltet, bitten wir euch um eine rechtzeitige Absage. Das ist wichtig, damit wir nicht unnötig Essen verschwenden müssen. Vielen Dank für euer Verständnis! **Anreise:** Per Zug: Vom Dortmunder HBF sind es ca. 10 Minuten zu Fuß. Mit dem Auto: Rund um das Office gibt es einige Parkflächen, dazu befinden sich in dem Parkhaus der Thier-Galerie weitere Parkplätze.

Join in with the latest Amsterdam JUG Meetup at [Sociale Verzekeringsbank (SVB), Van Heuven Goedhartlaan 1, 1181 KJ Amstelveen, Nederland](https://www.google.com/maps/place/Sociale+Verzekeringsbank+SVB/@52.3002571,4.8650419,16z/data=!3m1!4b1!4m6!3m5!1s0x47c60a8630087e7f:0xd39c7ed18855c5dd!8m2!3d52.3002571!4d4.8676168!16s%2Fg%2F1tf27wlm?entry=ttu&g_ep=EgoyMDI1MDQyMS4wIKXMDSoASAFQAw%3D%3D). Important notes: * **Bring your passport, or ID card, for identification, otherwise you will not be let in.** * When you register here on the Meetup page, please make sure to include your first and lastname. (If you have not done so, please drop a mail to amsterdamjug@googlegroups.com with your first and lastname.) * There is free parking, if you send your license plate number to amsterdamjug@googlegroups.com. * Vegetarian options will be available. In this meetup, in addition to food, drinks, and networking, you will experience the following program and talks: **Agenda** * **17:45 - 18:30:** Doors Open and Food * **18:30 - 18:45:** Introductions (Amsterdam JUG en SVB) * **18:45 - 19:30:** Talk 1: **Building Intelligent Java Apps: Agent Patterns, MCP, and the Future of AI Native Design** - [Daniel Oh (IBM)](https://www.linkedin.com/in/daniel-oh-083818112/) * **19:30 - 20:15:** Talk 2: **Crafting the Ultimate Docker Image for Spring Applications** - [Pasha Finkelsteyn (BellSoft)](https://www.linkedin.com/in/asm0dey/) * **20:15 - 21:00:** Talk 3: **MCP Apps with Spring AI** - [Alexey Lihovodov (Indurex)](https://www.linkedin.com/in/alexeylihovodov/) * **21:00:** Exit **Abstracts** **Building Intelligent Java Apps: Agent Patterns, MCP, and the Future of AI Native Design** - [Daniel Oh (IBM)](https://www.linkedin.com/in/daniel-oh-083818112/) As AI rapidly evolves from model experimentation to production-grade applications, Java developers are increasingly faced with a new paradigm: designing intelligent systems that can reason, interact, and adapt. This talk explores the emerging Java AI application development journey through the lens of agent-based architecture, with a focus on how the Model Context Protocol (MCP) and Agent2Agent (A2A) communication patterns are transforming the way we build intelligent, context-aware services. We’ll walk through the foundational shifts in building AI-native Java applications—moving beyond single-shot prompt-response interactions to multi-agent coordination, persistent memory, and tool-augmented reasoning. We’ll also address the critical architectural trade-offs: performance versus flexibility, open source versus vendor-managed inference, local versus remote model deployment, and how to maintain security and observability in agent-based systems. **Crafting the Ultimate Docker Image for Spring Applications** - [Pasha Finkelsteyn (BellSoft)](https://www.linkedin.com/in/asm0dey/) Docker is the cornerstone of today's development! Let's overview quickly how we use it in JVM development and then transition to practical examples. We will start with a simple Docker image containing a popular "one fat JAR" and look into its downsides (deployment speed, traffic volume). To address them, we will discuss the strategy of splitting the JAR into multiple layers and using multistage Dockerfiles, gradually improving our image. Join me to learn how to build the ultimate Docker image for Spring applications. **MCP Apps with Spring AI** - [Alexey Lihovodov (Indurex)](https://www.linkedin.com/in/alexeylihovodov/) MCP is already the de facto standard for connecting LLMs to tools and data, and earlier this year MCP Apps shipped as an official extension. Tools can now return interactive UI components that the host renders directly in the conversation, and a single MCP server can light these up across multiple hosts without per-client code. This talk unpacks how MCP Apps fit into the wider MCP picture, and walks through building one with Spring AI. We'll also cover the rough edges, since first-class MCP Apps helpers aren't in the framework yet. **Bios** [Daniel Oh](https://www.linkedin.com/in/daniel-oh-083818112/) is a Java Champion and Senior Principal Developer Advocate at IBM, where he leads efforts to advance cloud-native innovation through open-source technologies. Renowned for his ability to bridge technical and collaborative gaps, he empowers developers and organizations to build transformative solutions—from AI-driven applications and serverless architectures to resilient microservices. As a CNCF Ambassador and TAG DevEx co-chair, Daniel actively shapes the cloud-native ecosystem, fostering partnerships between enterprise developers, AI engineers, and platform engineering teams to accelerate hybrid cloud adoption. [Pasha Finkelsteyn](https://www.linkedin.com/in/asm0dey/) has years of experience in software engineering and the team's leading roles combined with his passion for Java made Pasha know all the hidden details in this IT niche. As a Developer Advocate for Bellsoft, he educates the public on the latest software tools built by BellSoft and helps to create and test instruments for developers. He writes in Kotlin, speaks at conferences, composes new articles, and maintains his pet projects. [Alexey Lihovodov](https://www.linkedin.com/in/alexeylihovodov/) is an engineering leader and software engineer with deep experience in backend, platforms and cybersecurity at scale. Over his career, he's worked with a wide range of technologies and across every layer of the stack, from low-level infrastructure up through data, frontend, and SRE. He's passionate about building great engineering cultures, and, as for many these days, tinkering with AI has become his current focus.

## 🎨**Activity for EXPATS & English Speakers** ☕ Are you an art enthusiast living in or around **Amersfoort, Hilversum, Utrecht, Nieuwegein, IJsseltein, De Bilt and the rest of cities of the Utrecht's province** who love painting or drawing? Maybe you've felt the joy of creating but struggled to find others who share your passion and speak **ENGLISH**? **You're not alone! 😉** ✨✨✨✨✨✨✨ ## 🖌️**About this event** You will meet other Art Lovers like you to Draw, Paint and have some drinks Together ! Our events are not just about sketching or creating art—they’re about building connections. Every two weeks, we meet at a café to have a relaxing time drawing a painting. Please keep on mind that **ENGLISH i**s the official language we will use to integrate everyone in our conversations. ⭕⭕⭕➡️ **IMPORTANT ⬅️** ⭕⭕⭕⭕ ### 👩🏻‍🎨**Book formally your Seat 🪑via [WHATSAPP](https://bit.ly/3BXXE0f)** **If you want to confirm officially your attendance and separate your seat🪑. Book your seat in meet-up, and contact us via [WHATSAPP HERE](https://bit.ly/3BXXE0f) to receive more information on the address of our activities.** **Thanks a lot for your understanding!** 💐🥰 ✨✨✨✨✨✨✨ ### 👩🏻‍🎨**How Does It Work?** This event is simple, this initiative takes 2 Hours. Most of the participants use pencils, water pencils or watercolours. Main aim is to socialize while we draw. There will be plenty of time to talk and get to know each other. We have to mention that this event is suitable for all levels. Many have started to draw in our event actually. Also it is very important that you **[JOIN US AT OUR WHATSAPP COMMUNITY](https://bit.ly/3BXXE0f),** to stay up to date on our upcoming events and participate in our Drawing and Painting Contests! **👉: [https://bit.ly/3BXXE0f](https://bit.ly/3BXXE0f)** 🍀 ✨✨✨✨✨✨✨ ### ☕**Where?** We will meet in different cafes mainly in the *center of Amersfoort ( and some occasions in other cities around)*. I will inform you of the exact place some days in advance this event. The place will depend on the number of attendees. ✨✨✨✨✨✨✨ ### **🎟️ What is included?** 🟢 **2 HOURS TO HAVE FUN!** 🟢 **15 mins warming-up creative activity and paper material**🖌️🎨 🟢 New friendships and **conversations in ENGLISH** in a relaxed atmosphere 🟢 **Souvenir picture** with you and the rest of Art Lovers 📷 🟢 Exclusive **access to our Art Lovers Community** on which you will receive: ***\~\~\~ Drawing challenges,*** ***\~\~\~ Training content,*** ***\~\~\~ FREE Entries only to members*** ***\~\~\~ Drawing Competitions*** 🟢 Time to **create alongside fellow artists and amateurs** 🟢 The freedom to **work at your own pace** 💃🕺🎈 ✨✨✨✨✨✨✨ ### 🖼️**Art Materials?** Bring your own practical art materials to be adaptable to sketch on a coffee table. Like your sketchbook, pencils, watercolor, markets, pencils, your Tablet..etc ✨✨✨✨✨✨✨ ## **See you to Paint, Draw, and drink together!🌟☕🍷🍪🍰**

Op 9 juni 2026 organiseren we Copilot Connect: Powering Marketing & Sales, een editie speciaal voor professionals in marketing en sales. Centraal staat de vraag: hoe zet je Microsoft Copilot slim in om je werk als marketeer of salesprofessional te versterken? We delen praktijkervaringen, gaan in op concrete toepassingen en kijken samen vooruit. Wat werkt al, wat zijn de uitdagingen, en hoe haal je meer uit Copilot in jouw dagelijkse werkpraktijk? Deze editie organiseren we samen met C4S (Copilot 4 Sales), experts in het toepassen van AI binnen sales en marketing. **👥 Voor wie is dit event?** Dit event is interessant voor: * Marketeers en salesprofessionals die Copilot willen inzetten in hun dagelijkse werk * Managers en beslissers die willen ontdekken wat AI betekent voor hun marketing- en salesteams * IT- en adoptieconsultants die klanten begeleiden in marketing- en salescontexten * Microsoft-partners en concullega's binnen het ecosysteem **🎤 Sprekers** * Eelco van Buchem en Pierre Vanderfeesten over AI als motor voor sales en marketing * Roland Driesen over wat AI strategisch betekent voor commerciële teams **📍 Praktische informatie** **📅 Datum:** Dinsdag 9 juni 2026 **📍 Locatie:** Brthrs, Plompetorengracht 4, Utrecht **🍽️ Eten en drinken:** Inbegrepen **⏰ Tijdschema:** 17\.00 uur: Inloop \| 17\.30 uur: Diner \| 18\.00 uur: Start sessies **🤝 Over Copilot Connect** Copilot Connect is een community voor iedereen die verder wil met Copilot. We brengen mensen samen om kennis te delen, vragen te stellen en van elkaar te leren. Praktisch, open en community-gedreven. Meld je aan en sluit je aan bij de Copilot Connect community. *Let op: dit evenement is Nederlandstalig.*

We’re heading out for a beautiful 20 km loop hike from Afferden through the gorgeous Nationaal Park De Maasduinen. This route takes us through a striking Limburg landscape of forest, sandy paths, open heathland, river dunes, and wide views. Along the way, we pass the ruins of Kasteel Bleijenbeek and climb an uitkijktoren for a panoramic view over the Maasduinen landscape. One of the special features of this hike is that we cross the Maas river twice by small ferry. These crossings give the route an extra sense of adventure and connect the Maasduinen landscape with the village side of the river. After one of the crossings, we continue to the village of Vierlingsbeek, where we’ll take our longer break for a drink. After the break, we make our way back toward Afferden, completing a varied loop through forest, heathland, castle history, river scenery, ferry crossings, and quiet Limburg countryside. A hike with forest energy, open heathland, castle ruins, a lookout tower, two Maas river crossings, and a relaxed village drink stop. **📍When and where to meet?** We’ll meet at 11h15 at Busstop "Afferden, Veer naar Sambeek" https://maps.app.goo.gl/kcg4hBvRsHoUjBSa6 ⏰ **We start walking a few minutes after meeting up** We don’t wait for latecomers, as we have a long route ahead and want to enjoy the full day properly. **🚗 Coming by car?** Please check your parking options beforehand so you arrive on time. **⏸️ Planned Breaks** After **4 km:** break at watchtower (5 min) After **7 km:** Having a lunchbreak at ruins of Castle Bleijenbeek (25 min) After **13 km:** Ferry over the Maas After **14 km:** Drinks at bar in Vierlingsbeek (50 min) After **20 km:** Ferry back over the Maas (bring small change to pay the ferry) I still need to confirm or make a reservation at the bar. **💸 Payment** Please pay as soon as you sign up: To keep things fair for everyone, if we don’t receive your payment within 48 hours, we will need to remove you from the participant list. If there’s a waiting list, this will happen sooner (in less than 48 hours). If that happens, no worries — you’re always welcome to sign up again if there’s space. 🌟 Early Bird Deal! Join now for just €4 — available for 3 days (72h). After that, the price will be €5. Please pay here: [https://tikkie.me/pay/hn1r44v9kl99o9agck71](https://tikkie.me/pay/hn1r44v9kl99o9agck71) **👟 Good to know** * Refund policy: Cancellations are fully refundable up to 1 week before the event (This is Friday 5 June at 23h59). After this period, the fee becomes non-refundable. * Hike difficulty: Our hikes are moderately challenging. Please only join if you’re confident you can keep up with the group’s pace (5 km/ h)— it’s more fun for everyone when we can walk together without long waits. * If the pace is too challenging: We may kindly suggest you continue at your own pace. We’ll give you clear directions to the nearest bus or train so you can return comfortably. * At your own risk: You participate at your own risk, so please make sure you have appropriate insurance coverage for outdoor activities. * Payment note: With Tikkie we only see initials (e.g., J. Doe instead of John Doe). Please include your Meetup name in the payment note so we can match it easily. * Friends joining: If you bring a friend, make sure they also register and pay. * What to bring: Snacks and enough water * Stay connected: Join our WhatsApp group to be the first to hear about future hikes — ask for the QR code during the hike. * T-shirts: Fairwear-certified organic cotton, eco-friendly inks — €25. Sustainable, odor-resistant, and perfect for hiking. Let us know your size and we’ll bring one for you.

This hike is one you don’t want to miss! It offers a lot of variety on a relatively short distance. From train station Rhenen, we will cross the river and walk along it for a while, until we cross it again by ferry, taking us to the beautiful wetlands of the ‘Blauwe Kamer’, where we might encounter all kinds of wildlife. After a break, we will continue to climb the Grebbeberg, a 52 meter peak in the hilly forest, towering above the river. We will then return to Rhenen, with the option of visiting this pittoresque old town. **Where to meet**: we will meet at **10.30am** at train station Rhenen. This train station can be reached by Sprinter train from Utrecht Centraal. **This hike is fully booked.** [You may register for a place on the waitlist on my website.](https://rewildyourself.nu/dutch-nature-hikes/)

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

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.

Topic to be announced. **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

Join the CONNECTED Westerville Mastermind Group for a dynamic afternoon of B2B networking! This event is perfect for professionals looking to expand their business connections, share insights, and foster collaboration within the community. Whether you are a seasoned entrepreneur or just starting out, this event offers a valuable opportunity to exchange ideas, build relationships, and grow your network in a supportive environment. Connect with like-minded individuals, explore potential partnerships, and discover new opportunities for professional growth. Don't miss out on this chance to enhance your business network and take your career to the next level with CONNECTED Westerville Mastermind Group! We meet the 4th Monday of every month from 11am-1pm. Welcome and general networking from 11am - 11:30am with core meeting 11;30 - 12:30 and a final round of networking from 12:30 - 1pm.

We are bringing Microsoft Build sessions to Columbus Ohio! The Central Ohio Azure Meetup and Central Ohio .NET Developer's Group (CONDG) are coming together to bring some of the labs and breakouts from Microsoft Build to your backyard. In this free, 1 day event, you are going to Build stuff with us! And yes, there will be free food. So please RSVP for a head count!

Feeling down? Sometimes depressed? Can't focus? Negativity & stress? Recent losses? Creativity in career and personal life hindered by mental blocks? Sometimes we never fully recover from traumatic experiences. Whether it was yesterday, last week or a year ago, traumatic experiences - a loss of a loved one, losing a job, a breakup - can leave you scarred. You talk about it and feel a little better, but it never goes away. After you hang up the phone, it's still there; the sadness, the cloud, the over-thinking, the worry, the guilt. You try to focus, but you're blocked. You try to look forward into new experiences, new relationships but a cloud is hanging over you, casting a shadow on what you once considered a bright, cheerful future. What happened to your courage? Your strength of character? You're 'why not' attitude? Whoever said 'time heals' must have had a special time machine, because after weeks, months, years, you're wondering - when exactly does that kick in? Sometimes it seems like drinking or drugs are the way to go. But they wear off, and now the problem is still there with added side effects from the drugs. At this free local Meetup event we will talk about: * What causes grief, anxiety and depression to become chronic. * Is it possible to regain your joy and happiness even after traumatic experiences? * How to break away from negativity and focus on the future * What are the steps to take to get control of your mind and your emotions? Learn about a safe, gentle, do-it-yourself counseling that can be done in the comfort of your own home. Let's explore safe, effective solutions for healing from traumatic experiences. Be sure to click on the red "Attend" button below to come to the event. We look forward to seeing you there. This group is sponsored by the Dianetics & Scientology Life Improvement Center.

**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