Parallel Programming

The Rabobank Tech Community together with [CodeLab](https://www.meetup.com/codelabjug/) is organizing a Java meetup for our community. Victor Rentea will speak at Rabobank in the evening of July 2nd. Because of the limited number of seats, please keep your RSVP up-to-date, so we can welcome someone else if you can't make it. **IMPORTANT:** Due to Rabobank security measures, we need to present in advance an attendee list with everyone’s full names. This is partly because Rabobank is, well, a bank, but also related to safety measures in case of an emergency. That is why we need to ask you the following: If you do not use your real full name as profile name at Meetup.com, could you send us your full name in a private message? The attendee list presented to Rabobank will only be used for visitor's registration at the reception and will not be published anywhere, we only do this to comply with said safety measures. The meet-up will be held in a non-public area of the building. This means that without proper registration the security team will not be able to let you in. Hoping for your understanding. === **Agenda** 17:00 Walk in + Dinner 18:15 Talk 20:00 Drinks 21:00 Ending **Talk** **Agentic Engineering - Patterns and Anti-Patterns** A compilation of emerging patterns and common pitfalls observed in over 50 companies. From unhealthy context management, naive prompting, unvetted AI slop, and careless supply-chain to self-learning skills, sub-agent orchestration, AI guardrails, and backpressure. Join this talk to cut through the hype, learn from the early adopters of agentic engineering – see what works, what ships better code 3x faster in production, and what fails **Speaker** Victor Rentea is a Java Champion and an Independent Trainer delivering intense webinars for dozens of companies worldwide since 2014. His passion is Simple Design, Refactoring, and Unit Testing, about which he regularly talks at top conferences, but also to the European Software Crafters Community that he founded. On [victorrentea.ro](http://victorrentea.ro/) you can find his blog, best talks, training curriculum, live masterclasses, and social channels.

**SUSE X I-share:** **Sprekers:** * [Hugo de Vries](https://www.linkedin.com/in/hugo-de-vries/) (Solution Architect) * [Bert Boerland](https://www.linkedin.com/in/bertboerland/) (Account Executive) * [Keown de Koning](https://www.linkedin.com/in/keowndekoning/) (Head of Channel) **Beschrijving** ''Tijdens deze sessie nemen we je mee door het brede SUSE-portfolio. Van de betrouwbare basis van SUSE Linux Enterprise Server (SLES) tot multicluster Kubernetes-beheer met Rancher en zero-trust containerbeveiliging met SUSE Security: SUSE biedt een compleet, onafhankelijk open-source ecosysteem van besturingssysteem tot cloudtechnologieën. We starten met de basis van SUSE en kijken terug naar de ontwikkeling van een Duitse open-source pionier in 1992 tot een wereldwijde enterprise speler van vandaag. Daarbij prikken we door de marketingverhalen heen en delen we praktijkvoorbeelden van organisaties die het volledige SUSE-portfolio inzetten om complexe infrastructuuruitdagingen op te lossen. Ook laten we zien hoe klanten de overstap maken van een Amerikaans georiënteerde infrastructuur naar een Europees alternatief. Tot slot geven we een live Rancher-demo, waarin je ziet hoe alle componenten naadloos samenwerken om moderne IT-landschappen te beveiligen, beheren en schaalbaar te maken. Wat kun je verwachten: * **Het volledige SUSE-verhaal** Hoe een Europese open-source pionier een complete technologiestack heeft opgebouwd – van operating system tot Kubernetes. * **Meer dan alleen containers** Inzicht in het bredere portfolio (Linux & Cloud Native) en waarom dit aansluit bij de behoeften van moderne enterprises. Inclusief mogelijkheden om jezelf hierin te laten opleiden tot specialist. * **Praktijkvoorbeelden uit de markt** Hoe organisaties het volledige ecosysteem gebruiken voor stabiliteit, compliance en schaalbaarheid en waarom SUSE steeds vaker de nieuwe standaard wordt. * **Live demo** Zie het portfolio in actie en ontdek hoe SUSE de volledige keten verbindt: van infrastructuur tot en met de applicatielaag. Of je nu infrastructure architect, platform engineer of security specialist bent: sluit aan en ontdek waarom het SUSE-portfolio perfect aansluit op jouw moderne infrastructuurstack!'' *Het programma zal deze avond als volgt zijn:* * Vanaf 17.15 u: inloop * Rond 17.30/18.00 u: eten * 18.30 u: start sessie * 20.00 u: afsluiting We zien jullie graag dan!

Codelab and the [Rabobank Tech Community](https://www.meetup.com/rabobank-tech-community/) are organising a Java meetup with Victor Rentea about: Agentic Engineering - Patterns and Anti-Patterns If you would like to join, subscribe quickly here (seats are limited): https://www.meetup.com/rabobank-tech-community/events/315294956 === **Agenda** 17:00 Walk in + Dinner 18:15 Talk 20:00 Drinks 21:00 Ending **Talk description** A compilation of emerging patterns and common pitfalls observed in over 50 companies. From unhealthy context management, naive prompting, unvetted AI slop, and careless supply-chain to self-learning skills, sub-agent orchestration, AI guardrails, and backpressure. Join this talk to cut through the hype, learn from the early adopters of agentic engineering – see what works, what ships better code 3x faster in production, and what fails **Speaker** Victor Rentea is a Java Champion and an Independent Trainer delivering intense webinars for dozens of companies worldwide since 2014. His passion is Simple Design, Refactoring, and Unit Testing, about which he regularly talks at top conferences, but also to the European Software Crafters Community that he founded. On victorrentea.ro you can find his blog, best talks, training curriculum, live masterclasses, and social channels.

¡Fútbol, español y buena compañía! ⚽🇪🇸🇲🇽🇦🇷 Join Los Habladores at Longhorn Bar & Grill to watch a World Cup match with a Spanish-speaking twist. This is a relaxed event for anyone who wants to watch the game, meet other Spanish learners/speakers, and practice a bit of Spanish along the way. You don’t need to be fluent or native — just dare to join and share! Important: this event may not have an official Los Habladores host. But don’t worry: when you arrive, just tell the staff at the entrance that you are with \*\*Los Habladores\*\*. They will point you to the right table / Spanish-speaking corner where the group is gathering. We never know exactly how many people will join, so please RSVP if you’re coming. That helps Longhorn prepare enough space for us. 📍 Location: Longhorn Bar & Grill, Utrecht 💸 Entry: Free 🍻 Food and drinks available at the bar ⚽ Match: **España** vs **Austria** 🕒 Kick-off: 21:00 ¡Nos vemos! Tot dan! 😃 Facebook Group: https://www.facebook.com/groups/habladores/ Meetup Link: https://www.meetup.com/nl-NL/los-habladores/ Instagram page: https://www.instagram.com/los_habladores_utrecht/ Los Habladores!

Join us for an hour of writing! We’ve discovered that it’s strikingly helpful to write with other writers. See if it’s true for you at Factor-ij Amsterdam on Thursday mornings. Be it a book, blog, script, essay, dissertation, resume, melody, poem or just plain work stuff, you are invited to write it with us. No one will see what you've written or give you unsolicited advice. Instead of just thinking about writing, come and get some real writing done. SCHEDULE: 11: 15 AM - Quick introductions 11: 30 AM - Timer starts: write for 1 hour 12: 30 PM - The End: chat, take off, or keep writing OPTIONAL SOCIALIZING happens at 12:30 pm after the writing is wrapped. Writing is very solitary. Connecting (and sometimes even commiserating) with other writers is a cool thing. BEING LATE IS OKAY: just show up and get settled, then check-in with me after the session. (I’ll be the person with the Shut Up & Write! sign.) If you were on time, please be willing to make room for the friendly latecomer. Happy writing and I look forward to seeing you at Factor-ij! What Should I Bring? Whatever you need to be able to write! Bring earbuds/earplugs if you want to block the cafe’s overhead music or the occasional conversation by other patrons. Please come with your devices pre-charged, since we probably won't be always sitting somewhere with charging possibilities. Other Important Details: Travel by public transportation: 1. Take Tram 26 from the central station Amsterdam, and step out by the last stop. 2. Take bus 66 from the Amsterdam Bijlmer station, step out by Pieter Oosterhuisstraat, and further walk in the direction of the bus till the corner. FREE Wifi. Compulsory consumption is not required, but please do order a drink to honor our generous host.

Are you an **expat** in **Diemen** and do you want to **learn how to swim?** Look no further! Dive into **personalized swimming lessons** with **Your Personal Swim Coach**. Whether you’re a beginner looking to learn the basics or an advanced swimmer seeking to refine your technique, our expert coaches offer **tailored sessions** that fit your needs. The **AGO** pool in Diemen is a small private pool originally utilized for **aqua therapy**. Therefore the water is nicely **warm** which gives ideal teaching conditions. **Don't wait any longer:** **[Sign up for a Try Out Lesson!](https://www.your-personal-swim-coach.nl/product/try-out-adult-swimming-lesson/)** Want to learn more first? Go to our **[website](https://www.your-personal-swim-coach.nl/)** or **[schedule a call!](https://calendly.com/ypsc/new-meeting)**

🎨 **Crealab – Connect & Create!** 🧵 Looking for a cozy space to get creative and meet others who enjoy making things with their hands? Whether you’re into drawing, painting, jewelry making, collage, handcrafts or clay — **bring your own project or come as you are and get inspired!** Everyone works on whatever they feel like, in a relaxed and welcoming atmosphere. We encourage each other, share ideas, and enjoy the creative flow together. ✨ A creative facilitator is there to offer tips, support, or a little spark if you need one. **We’ll have some basic materials available to get you started — but if you want to work on a specific project or product, feel free to bring your own supplies.** 💬 No pressure, no experience needed — just curiosity and the joy of creating. 🗓 **Every Thursday, 12:00 – 15:00** 📍 **Dynamo Atelier 77, Vechtstraat 77A, 1079 JA Amsterdam** 🎟 **€1 (cash only)** Come get inspired, make something with your hands, and connect through creativity. 🎨

Join us for an outdoor mat Pilates session in Wilhelminapark, Utrecht 🌿 This is a beginner-friendly full-body Pilates class for anyone who wants to move, feel stronger, enjoy being outside and meet new people in a relaxed way. We’ll start with a mat Pilates class in the park, focusing on strength, mobility and feeling good in your body. After the class, we can stay in the park for a little chat and connect with each other. You can come alone — many people do. Please bring your own mat if you have one. If you don’t have a mat, send me a message in advance and I can bring one for you. 📍 Wilhelminapark, Utrecht 🗓 Sunday, 5 July ⏰ 11:00 💸 Ticket: €15 Spots are limited, so please reserve your ticket if you’d like to join.

'THE SYMPATHIZER' by Viet Thanh Nguyen 'The winner of the 2016 Pulitzer Prize for Fiction, as well as seven other awards, The Sympathizer is the breakthrough novel of the year. With the pace and suspense of a thriller and prose that has been compared to Graham Greene and Saul Bellow, The Sympathizer is a sweeping epic of love and betrayal. The narrator, a communist double agent, is a man of two minds, a half-French, half-Vietnamese army captain who arranges to come to America after the Fall of Saigon, and while building a new life with other Vietnamese refugees in Los Angeles is secretly reporting back to his communist superiors in Vietnam. The Sympathizer is a blistering exploration of identity and America, a gripping espionage novel, and a powerful story of love and friendship.' ***Please read the book and join us for a lively discussion (in English) about the contents during our afternoon book club meeting.*** \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- **PLEASE NOTE:** This is an IN-PERSON event in Amersfoort, The Netherlands. Please cancel your attendance in advance if you are unable to join, so that those on the waitlist can participate. Looking forward to seeing you all IN REAL LIFE then! Best regards, Sandra

Join us for a fun session of improv theatre in English! A great opportunity to meet new people in Utrecht and learn something new with [Improv Utrecht](https://improvutrecht.nl). Everyone can partcipate, you don't need any experience in theatre nor fluency in English. In this session you will: * Meet fellow international and local players. * Learn the basics of improvisation, a 21st-century skill that is useful in many aspects of life. * Get out of your head. * Enjoy failing. * Play funny and moving theatre games. * Laugh a lot, while surprising yourself and others. Doors open: 19:50-20:00, come in with the others ([SIDE entrance, at the Troelstralaan](https://maps.app.goo.gl/ntLDUqbkDxMHjp7B7)). After 20:01 the door may be closed, but you may find a participant who knows the door code. Workshop: 20:00-22:00 Every Friday except in school holidays Afterwards we have drinks at [O'Leary's](https://maps.app.goo.gl/gL878K1MZf8v5fpm7) pub together ### How to sign up Full details about how to sign up and any other questions you may have can be [found on our website](https://www.improvutrecht.nl/drop-in-workshops/). An RSVP in this Meetup event is not enough! We track attendance by counting the attendants in GrasshopperSignup. If you flag yourself as attending and can no longer make it, please delete your x in the sheet so that someone else can take your spot. If you leave your contact details at the Signup form we will contact you if there is a problem with a drop-in you are scheduled to attend. We also have a WhatsApp group with a variety of members from across Utrecht where we share events and updates. You can find our courses and shows on [our website](https://www.improvutrecht.nl). Participation is pay-what-you-can, but we suggest a donation of €10-20 by cash or Tikkie to help cover costs (location, travel) and show your appreciation for our professional trainers who dedicate their Friday to promoting improv.

🎭 Improv Utrecht Presents a Show Like No Other! 🎭 The graduates of the advanced course of trainer Rutger Pull at Improv Utrecht will take the stage at Villa Concordia to showcase their skills in a very fun and interactive show. 💡 What is Improv? Improv is live, unscripted theatre where anything can happen! The performers create characters, scenes, and entire stories from scratch, all based on audience suggestions and their quick-thinking creativity. It’s spontaneous, electric, and completely unique—no two shows are ever the same! 🎟 Tickets Now Available! Don't miss this one-night-only spectacle of storytelling and laughter. Secure your tickets online before they’re gone! Book your ticket at [improv-utrecht.weticket.io](http://improv-utrecht.weticket.com/) : €12 plus €1 service fee Before and after the show we have a very nice bar to meet & greet people. 📅 When? Saturday 4 July 20:00h. Bar open 19:30 📍 Where? Villa Concordia. In your ticket confirmation mail you find directions to the theatre. Limited free parking spots available, close to Utrecht Central station. Join us for a night of creativity, comedy, and community—we can’t wait to see you there! Find out more about Improv Utrecht, our other shows and courses at [www.improvutrecht.nl](http://www.improvutrecht.nl/)

I'm excited to host the 25st 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

The Dutch Heuvelrug is a hilly and sandy ridge, running from Hilversum in the north to Rhenen in the south. This National Park is covered in forest, heather and stretches of sand and dunes. On this hike, we will explore the Heuvelrug from Den Dolder. This area is mostly forested, perfect for a (hot) summer’s day! **Where to meet**: we will meet at **10 am** at train station Den Dolder. We will return to the same train station around 3pm. **This hike is fully booked.** [You may register on my website for a place on the waitlist.](https://rewildyourself.nu/dutch-nature-hikes/)

Iedereen is welkom op onze open Freedom Friday Bitcoin Turnhout Meetup @ het super gezellige café Sint Pieter - Grote Markt 60, 2300 Turnhout Geen presentaties. Geen workshops. Gewoon 1 onderwerp: bitcoin. **Connect with Like-Minded Minds** Engage with the Bitcoin community and mingle with fellow enthusiasts. This meetup is your chance to discuss the future, share ideas, and network with pioneers in the decentralized money world. 🏢 **Central Location**: café Sint Pieter ligt perfect centraal, een ruim cafe op de grote markt van Turnhout. Mark your calendars and spread the word!

We have moved to guild.host. Look us up there. https://guild.host/events/buckeye-cocoaheads-rcavwd

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

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)

Most people use LLMs by feel: ask a question, read the answer, decide whether it “seems good,” and move on. That works for casual use. It does not work when you are building software, automating workflows, writing important documents, or relying on AI for anything that needs to be repeatable. In this talk, we’ll look at how to improve and evaluate the inputs and outputs of LLMs using practical measurement techniques. We’ll cover how prompt changes affect results, how to compare outputs, how to build simple evaluation sets, and how math-based methods like similarity scoring can help you move beyond guesswork. This will be beginner-friendly, so even if you don't know anything about AI, you should get something out of it. However, this will be a little more technical than our intro talks. You do not need to be an AI researcher, but programmers and technically curious attendees will get a lot out of it. We’ll cover: * Why “it looks good” is not enough * How to improve prompts by changing the input, context, and constraints * How to compare LLM outputs more systematically * Basic evaluation techniques for accuracy, consistency, and usefulness * How embeddings, cosine similarity, and scoring can help evaluate results * Where automated evaluation works — and where humans still need to stay in the loop By the end, you’ll have a practical mental model for treating LLMs less like magic and more like systems you can test, measure, and improve. LOGISTICS AND PARKING: The talk starts at 7:00 PM. The first half hour is reserved for everyone to get set up and mingle. Free pizza and drinks! The cheapest parking option is to find street parking, which will only cost you a few bucks. Otherwise, park in the nearby veteran's museum lot for $8. It's highly recommended you avoid the nearby $15 garage parking.

This presentation will be by Ben Iten, humanist chaplain and HCCO Board Member. Speaking on expressing Humanism values in American democracy. This meetings will be hybrid. You can meet us in-person or attend online. The formal presentation will start at noon. Food and drinks will be provided at the event. Feel free to show up a little bit early to hang out and talk. The Humanist Monthly Program is our longest running event and still a community favorite. In the old days it used to be called "Going to HCCO" and we still like to think of it as our flagship event. Join Zoom Meeting [https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1](https://us02web.zoom.us/j/87836564953?pwd=4Mi57ElZkDIFlb1fnlNwOJ0NiOK4tP.1) Meeting ID: 878 3656 4953 Passcode: 760812 One tap mobile +19292056099,,87836564953#,,,,\*760812# US (New York) +13017158592,,87836564953#,,,,\*760812# US (Washington DC)

Our monthly PHP meetup. A virtual shindig courtesy of Zoom. Check back here for the details around 6:15 pm

**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