Parallel Programming

**Liebe Gophers,** am 13.Mai geht es bei uns um eines der wichtigsten Patterns in verteilten Systemen: das **Transactional Saga Pattern**. Wer mit Microservices arbeitet, kennt das Problem – eine Bestellung aufgeben klingt einfach, aber dahinter stecken Payment Service, Inventory Service, Shipping Service... und jeder hat seine eigene Datenbank. Was passiert, wenn mittendrin etwas schiefläuft? Klassische ACID-Transaktionen funktionieren hier nicht. Sagas schon. Unser Speaker Mark Borukhov zeigt, wie das Saga Pattern funktioniert – mit echtem Go-Code, einem E-Commerce-Beispiel und Live-Demo. **Was euch erwartet:** * Warum verteilte Transaktionen ein echtes Problem sind * Saga Pattern: Konzept, Choreography vs. Orchestration * Implementierung in Go – Schritt für Schritt * Pitfalls, Lessons Learned & Q&A Das Event richtet sich an alle – von Go-Einsteigern bis zu erfahrenen Entwicklern. Auch wer Go nicht kennt, aber Microservices baut oder Patterns liebt, ist herzlich willkommen. **Der Vortrag wird auf Deutsch gehalten.** Wir treffen uns um 18 Uhr bei [lynqtech](https://www.lynq.tech/). Mit dem Vortrag starten wir um 18:30 Uhr. Danach wollen wir über Technologien und Erfahrungen plaudern, voneinander lernen, Kontakte knüpfen und einfach eine tolle Zeit miteinander verbringen. Wir freuen uns auf euch! 🚀 *Mark & Anna*

*We work on each other's practical goals & "impossible" dreams* \*\*\* Help wanted & help offered. Bi-weekly meetings (every two weeks). Language English/Dutch. This idea is inspired by Barbara Sher's story and experiences. Please see her Ted Talk titled "Isolation is the dream-killer, not your attitude". The idea in short: One person at a time tells the group his/her dream or aim and the obstacles they face to achieve it. It could be a trip, an experience, a change of career, an undertaking of some kind, learning a skill, solving a particular problem or even finding out what you really want. The group works to realise the person's aim. Not just theoretically, also practically. For this we use our experience and networks. —Nothing as satisfying as helping another! Perhaps suitable, Gabor Mate's words: "You never heal alone." Please contact me at galatv@protonmail.com if you have questions. We gather in a pleasant space at Rosa Buurtcentrum. On the 2nd floor ("eerste verdieping"), take the door at your right (right from the staircase), at the end of the small hall, the last door left). There will be tea and you are welcome (but not required) to bring snacks. It's free (50 cents for tea contribution is appreciated). We'd love to have you. Painting: Vladimir Orlovsky - Shoal

Join Emma and a lovely group of students in this special short course for intermediates or advanced. We will focus on a few specific skills based on training needs from the group: how to strongly start a scene and "yes and the hack out of eachother" etc. Location: Buurtcentrum Oase Time: Wednesdays 20:35-22:20 Price: €160 For whom: people who have done 2 courses or have a experience with the basics Wednesdays 13 May - 17 June 2026 6 lessons 7th session: Show on Sun 7 June (afternoon or evening) lessons 20:35-22:20. Location Buurtcentrum De Oase (free parking and next to train station Zuilen. Teacher Emma Holmes. T**eacher Emma Holmes** Emma Holmes is specialised in Improv, Stand-up Comedy and Storytelling. Emma has a sharp eye for how you can become a pleasant co-player for the other players. You will learn how you don’t have to act funny, but let the fun evolve from the story (finding the game). You will learn to be silly, out of your comfort zone without fear of failing, Presentation skills, active listening skills. And much more. ### About the tickets Improv Utrecht offers 1 or 2 funded courses with 20% discount for people with less finances. Send a message to Marieke van Laar. **Tickets: improv-utrecht.weticket.io** info: www.improvutrecht.nl/

\# This meetup is around a third\-party organizer\, Focus Filmtheater\. You can either purchase your ticket online or right before the session\. **Seats are numbered**. We can meet for a drink before the movie. # **Title**: A Useful Ghost **Language**: Thai **Subtitles**: English **Length**: 130 min **Director**: Ratchapoom Boonbunchachoke **More info**: https://www.focusarnhem.nl/agenda/english-subs-a-useful-ghost/ **Ticket link: https://www.focusarnhem.nl/tickets/144298/** **Synopsis**: *A Useful Ghost* is a genre-smashing combination of fantasy, horror, romance, comedy, art house and everything in between. After the death of an employee at a family-run appliance factory, a strange phenomenon occurs. Spirits are possessing their products. This turns out to be good news for March (Wisarut Himmarat), the son of the factory owner, who is deep in mourning following the dust-poisoning death of his pregnant wife Nat (Davika Hoorne). March is reunited with his beloved in the form of a vacuum cleaner. Changing the social conception of ghosts, Nat’s love makes her decide to be of service by getting rid of the useless ghosts. Alongside the tale of the couple is the story of a repair guy (Wanlop Rungkumjud) who shows up at the door of a self-declared “Academic Ladyboy” (Wisarut Homhuan) to fix another possessed vacuum. The intertwining stories and unimaginable turn of events reveal complex layers and deeper context beneath the setting dust. Don’t let the breathtaking images fool you. There is more than what meets the eye! **How it works**: I will be at Focus around 6:15, where we can meet before the movie starts and have a drink. You can message me to find us. Screening starts at 6:45. Hope to see you soon!

**Welkom bij Coding Wednesday!** Samen duiken we in de creatieve wereld van programmeren. Elke maand is er een challenge of workshop gericht op coderen. In de regel maken we gebruik van de programmeertalen die je bij Novi leert (Python, Javascript, Java) **Wat doen we deze keer?** Altijd al samen willen werken aan een programmeerproject? Deze Coding Wednesday bouwen we een website na met de hele groep. Iedereen krijgt een apart onderdeel om te designen. Dit doen we met HTML, CSS en het Javascript framework React. De onderdelen worden met pull requests samengevoegd in het Github project. **Heb ik voorkennis nodig?** Het is handig als je al wat programmeerervaring hebt en hebt gewerkt met Github. Zo niet, kijk vooral mee om iets op te steken. Of werk met iemand samen! Uiteraard kan je je voorbereiden met online tutorials. **Wat heb je nodig?** * Je eigen laptop met WiFi aansluiting * Installeer een **code editor**. Novi studenten kunnen Webstorm of IntelliJ gebruiken. Anders is [VSCode](https://code.visualstudio.com/download) een prima editor * Zorg dat je een Github account hebt en Git hebt geinstalleerd. Tip: oefen vooraf met een dummy project om te zien of je code kan toevoegen vanaf een pull request. **Is er een minimum aantal aanmeldingen?** Coding Wednesday gaat door als er 5 aanmeldingen zijn of meer. Dus vergeet vooral niet om je aan te melden :) Mocht het niet doorgaan, laten we dit hier weten voor 13 mei 12:00 uur! Details: 📅 Wanneer: Woensdag 13 mei 2026, 14:00 uur (tot uiterlijk 17:00) 📍 Waar: Op locatie! Newtonlaan 247, Utrecht (4e etage)

Hi all! 🙂 On Wednesdays we welcome you to practice languages! If you want to practice a specific (uncommon) language, please send us a message so we can find some conversation partners for you on our mailing list! We hope to see you in Café Marktzicht! In the last year we had tables for the following languages: * Dutch * English * French * Italian * Spanish * Turkish\* * German\* * Portuguese\* * Danish\* * Norwegian\* * Russian\* * Arabic\* * Chinese\*\* * Japanese\*\* * Indonesian\*\* * * Most likely, but not every week present. \*\* - Rather rare ;-) If your language is not in this list, please let us know! We have a large database of Language Cafe visitors speaking 56 different languages! We might be able to connect you with a person that does speak the language you want to practice. In case you are not in our database yet, please use this form: http://goo.gl/forms/oSCn9Dn8m8

We’re heading out for a beautiful cross border hike through forest, heathland, open landscapes, and a very special midpoint stop: **De Achelse Kluis**, a historic abbey on the border between the Netherlands and Belgium. The hike starts in the Netherlands and takes us through the peaceful **Leenderbos**, one of the most atmospheric forest areas in North Brabant. Expect woodland paths, sandy tracks, heath, open views, and that lovely Veluwe style feeling of moving between forest and open landscape. As we continue south, we make our way toward the Belgian border and our main break location: **De Achelse Kluis**. This unique abbey complex lies between **Hamont Achel** and **Leende**. With roots going back to the 17th century, and later known as a Trappist abbey, it offers a beautiful neogothic setting with a brasserie, abbey shop, and a calm historic atmosphere. After several kilometers of forest and heathland walking, arriving at the abbey will feel like a real reward. We’ll take our longer break here, with the option to enjoy the brasserie, have a coffee, try Limburgse vlaai, taste an abbey beer, or simply relax around the grounds. After the break, we cross back into the Dutch side and return through the Leenderbos, completing a full loop through forest, heathland, and quiet countryside. A hike with forest energy, abbey atmosphere, monks’ history, and a touch of Belgium. 📲 **WhatsApp group** I’ll open a temporary WhatsApp group for everyone signed up before the hike, so we can coordinate carpooling, final break arrangements, and any last minute updates. **📍When and where to meet?** We’ll meet at 11h15 at Busstop "Leende, Valkenswaardseweg/A2"" https://maps.app.goo.gl/Uij4AmfEos2foDbQ8 ⏰ **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 around **10 km:** 60 minute break at **De Achelse Kluis** I still need to confirm the practical arrangements with the brasserie, including whether we can just have drinks or whether we need to order food as well. I’ll share the update in the WhatsApp group once confirmed. **💸 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/ute915nnuvqfl74002hh **👟 Good to know** * Refund policy: Cancellations are fully refundable up to 1 week before the event (This is Friday 8 May 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 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.

Have you always wanted to visit the Netherlands, but for no specific reason, you never actually did it? How about spending a weekend of street photography in one of the most beautiful Dutch cities-Utrecht-with me? | lived in Utrecht for 8 years and can show you all the beautitul spots. Find more details on my website! Workshop Details Where: Utrecht, The Netherlands When: 17.05.2026 Time: 12:00 — 15:00 AM What you’ll Learn * Master how to use natural light and shadow to create striking black and white images * Capture candid street moments with confidence * Embrace ICM (Intentional Camera Movement), a creative technique that combines deliberate camera movement with a slow shutter speed to create abstract, painterly images * Discover the timeless beauty of black and white street photography Your participation costs 150 CHF. Please register directly through my website to secure your spot: www.katjabouwman.com/workshops

## 🎨**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!🌟☕🍷🍪🍰**

Have you always wanted to visit the Netherlands, but for no specific reason, you never actually did it? How about spending a weekend of street photography in one of the most beautiful Dutch cities-Utrecht-with me? | lived in Utrecht for 8 years and can show you all the beautitul spots. Find more details on my website! Workshop Details Where: Utrecht, The Netherlands When: 16.05.2026 Time: 07:30 — 10:30PM What you’ll Learn * Master how to use natural light and shadow to create striking black and white images * Capture candid street moments with confidence * Embrace ICM (Intentional Camera Movement), a creative technique that combines deliberate camera movement with a slow shutter speed to create abstract, painterly images * Discover the timeless beauty of black and white street photography Your participation costs 150 CHF. Please register directly through my website to secure your spot: www.katjabouwman.com/workshops More info on www.katjabouwman.com/workshops or visit my Instagram account katja_zuerich

Come play improv theatre in English and kick off your Friday evening with laughter, creativity and new people. This [drop-in workshop](https://www.improvutrecht.nl/drop-in-workshops/) is open to everyone, whether you are trying improv for the very first time or you have played before and want to stay sharp. **Special topic: Movement & Theatre improv** Movement improvisation is a wonderful basis for all other forms of improvisation. Well before we had language we had movement; there is so much that can be expressed without words. Instead of the games that are used in theater improv, we work mostly with “scores”, or a kind of blueprint to what will happen in a space of time. A kind of a structure. We will do exercises that originate from Viewpoints, physical theater, and other forms of improvisation (including a bit of Contact Improv at times), and moving in/with/through the space, non verbal contact and how we can communicate through our bodies. Anyone can participate, you don’t need any experience in movement or theater nor complete fluency in English. This workshop is without shoes: bring non-slippery socks We play from 20:00 to 22:00. Doors open between 19:50 and 20:00 and you enter together via the side entrance on Troelstralaan. After the workshop, many people head to O’Leary’s nearby for a drink and a chat. Sign up by adding your name via [https://bit.ly/iudropin](https://l.facebook.com/l.php?u=https%3A%2F%2Fbit.ly%2Fiudropin%3Ffbclid%3DIwZXh0bgNhZW0CMTAAYnJpZBExYzVUWUpNcUx3Qmxyc0tCNnNydGMGYXBwX2lkEDIyMjAzOTE3ODgyMDA4OTIAAR5K0FVPivgkRn67BEoDofHkr7Es12_1bq4hDCggWDXNdpNhLZnzLNMNtrNdqw_aem_j1YiiuZaWNnyDZ5jbnCCBQ&h=AT2fpKsMMORdusQhpZ9iv0ed8772wQ5kPJcHxIGz5i8iQEJK0FVlSpqVqEh62oBzSisT7moNRPBSDvWIuZEL9WgLIXRbLyqXfXj7sE7CYyKbKxqnakD0W31HOEXSgK_5tuPYJFStscaUvrh-0pc&__tn__=q&c%5B0%5D=AT3WQkDUYF4F66VuKR4XhsJ2afRvpjsAkK93Octb-hRh_JIzYk-7ePG7XSFfHFYxd9GLxqQgCwnPjN2yiYBNVADfb7VXyjFO1sHIArS4Jo43x4NQHr-b2RMtZUH_TIvYncgegRNFx3P2HDQbu5bCg5dzFhmaWlgHFa4). If you can no longer attend, please remember to remove yourself so someone else can join. The workshop works on a Pay What You Thought It Was Worth basis. Suggested donation is €10 to €20, but you are always welcome regardless of what you can pay. Contributions help cover the room and the professional trainer giving up their Friday evening. Whether you come to learn, to meet people, or just to have a joyful Friday evening, you are very welcome.

Gran Fondo Rosa is a must ride in the Netherlands, and since years we are riding under the ATAC flag! 3 distances available: 80, 120 and 170km. It’s a sportive so not a race, you choose your pace and we enjoy the race ride. Roads are closed and there are food and drink stops along the way. When signing up, select FRIEND TEAM and then type ATAC as the team. We will have our own table at the pasta party. Sign up here: https://www.nltourrides.nl/gran-fondo-rosa/#inschrijving Cheers !

I'm excited to host the 22st edition of *Strangers to Friends*! Every event so far has been warm, fun and full of great connections. So we’re doing it again! Curious about our previous events? Check out our photo albums (only visible on the laptop version of Meetup). **What to expect** * A safe, relaxed environment to meet both locals and expats, whether you want to meet new people, experience an international atmosphere or talk about business, it’s all possible. * Start the evening with a few rounds of conversation cards: pair up with someone you don’t know, answer meaningful questions and rotate every 10 minutes. Within just one hour, you’ll get to know several people really well and enjoy meaningful conversations. * Everyone comes on their own, so it’s easy to connect. **Practical details** * Doors open at 20:00, after 30 minutes we start with conversation cards * Venue: Boekencafé Libertas, Klarendalseweg 477-1, Arnhem * 20 min walk from Arnhem Central * 7 min walk from Arnhem Velperpoort * You’ll receive 1 drink token for (beer/wine/soft drinks) and snacks all night! * Find us on the right side of the café at the bar, by the window and garden Bring a smile and join us for an evening where friendships grow, business ideas spark and real-life connections happen. Back to basics, away from screens, meeting face-to-face. Warm regards, Julia

**Important time note:** Please plan on arriving between 5:30 and 6:00 as the elevators lock after 6 and you'll need to message us and we'll need to come get you. The building address is 4450 Bridge Park The entrance is 6620 Mooney St, Suite 400 You will need to scan your ID at the door to get a visitor badge. **Abstract** TBD **YouTube Link** TBD

Bring your work or your hobby, hang out, and code with us. Follow @buckeyecocoa for more information.

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: This month John Lairson will share a notebook describing the Alpaca (Paper) Trading API and discuss different algorithms for evaluating stock trades. We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com

We connect you with up to 30 Men or Women tennis partners close to your PLAYING REGION and skill level. This program is less competitive, no champions crowned, no league standings just dedicated tennis partners who want to meet up with you on the courts. Players will meet up to play a tennis match or just to hit around. Just go through the [Join Page](https://www.tenniscolumbus.com/partner-program) to enter this program. [https://www.tenniscolumbus.com/partner-program](https://www.tenniscolumbus.com/partner-program)

Customer identity resolution becomes increasingly complex as organizations scale across multiple systems, regions, and data formats. Traditional rule-based approaches often fail to keep up with data variability, require constant manual tuning, and struggle with real-time processing needs. This session presents a practical approach to building a scalable identity resolution pipeline using AWS services and modern AI techniques. The architecture combines data ingestion through Amazon S3 and AWS Glue, transformation pipelines using Spark on EMR, and machine learning models deployed via SageMaker for entity matching and standardization. Graph-based relationship modeling is implemented using Amazon Neptune to improve resolution accuracy by incorporating household and shared attribute context. We will walk through how machine learning models can be used for name and address normalization, how intelligent blocking strategies improve matching efficiency, and how feedback loops can be introduced to continuously improve accuracy. The session also highlights how serverless components such as AWS Lambda can be used for orchestration and real-time processing. **SPEAKER BIO** Mosaic Syed is a Senior Data Engineering and Cloud Solutions Architect with over 20 years of experience designing and delivering scalable, secure, and high-performance data solutions across global enterprise environments. https://www.linkedin.com/in/mosaic-basha-syed-92300856 **CALL FOR SPEAKERS** Learn more: [https://www.awscolumbus.com/get-involved/](https://www.awscolumbus.com/get-involved/) **THANK YOU** *VEEAM* for hosting our meetup! To learn more about *Veeam*, please visit their website: [https://www.veeam.com/](https://www.veeam.com/) **DIRECTIONS** 8800 Lyra Dr #450 · Columbus, OH go to 4th floor. **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 us for a practical, beginner-friendly guide to choosing the right large language model. We’ll compare major models like ChatGPT, Claude, Gemini, and Llama, talk about when to use hosted APIs versus local models, and break down the tradeoffs around cost, speed, quality, privacy, context windows, coding ability, and reliability. You’ll leave with a clearer mental model for picking an LLM based on your actual use case instead of hype, benchmarks, or brand names. No deep AI background required. 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.

We will show how to build custom agents with Microsoft Agent Framework. Attendees will learn how to build and custom host agents when Microsoft Foundry is not a viable option.