Squash

Donderdag 21 mei 2026 is het weer tijd voor onze Techday: hét vaste moment waarop we kennis delen, elkaar inspireren en nieuwe ideeën direct in de praktijk brengen. Deze editie pakken we het aan als een conferentie in het klein. Drie sprekers, drie verhalen, één middag – drie verhalen voor de prijs van één. Wat kun je verwachten? **Dirk neemt een kijkje onder de motorkap van AI** AI voelt voor veel mensen als magie. In deze talk probeer ik de magie weg te nemen door een kijkje te nemen onder de motorkap. Een essentieel bouwblok van moderne AI is een neuraal netwerk. Als je begrijpt hoe een neuraal netwerk werkt, is het een stuk makkelijker om te begrijpen hoe en waarom een LLM werkt. De beste manier om iets te begrijpen is door het te bouwen, vanaf scratch. Dus dat gaan we in deze talk doen. Door dat te doen leren we over artificial neurons, activation functions, backpropagation en meer. **George vertelt hoe AI Cyberaanvallen verandert** George Schizas (extern), voormalig IT Manager, nu werkzaam als CISO, vertelt over zijn ervaringen in de Cloud Cyber Security en hoe hackers met behulp van AI nieuwe aanvalsmethoden kunnen gebruiken om kwetsbaarheden op te sporen en te exploiteren. Hij geeft voorbeelden van manieren om in Kubernetes omgevingen in te breken en noemt manieren om dit tegen te gaan. **Roland duikt in de wereld van de fraude fabriek** Als ontwikkelaar kom je dagelijks in contact met technologie en de laatste jaren natuurlijk ook vaak met AI. JIJ snapt heel goed wat de voordelen en de gevaren zijn, maar hoe leg je complexe onderwerpen als AI gegenereerde afbeeldingen, Voice Phishing en Hallucinaties uit aan je ouders, de buurvrouw, of je kinderen? Ik neem jullie mee in een realistische situatie waarin Anna en haar familie opgelicht wordt met behulp van verschillende technieken en hoe dit oplichters-landschap met behulp van AI verandert. **Wanneer:** Donderdag 21 mei 2026 **Wat:** Techday – conferentie-editie “AI kansen en valkuilen” **Voor wie:** Iedereen (!) die nieuwsgierig is en wil leren **Agenda** 14:45 - 15:00 - Inloop 15:00 - 16:00 - Neurale netwerken 16:15 - 17:15 - AI risico’s en kansen 17:15 - 18:00 - Eten 18:00 - 18:45 - Fraude fabriek We zien je graag op de Techday!

**King of the Squashcourt:** A fun and competitive tournament for all levels. A great way to get to know and play with other players in a friendly setting. When : Thursday evening 21 may Time : 19:00 until 21:00 Where : Frans Otten Stadion ijsbaanpad 43 1076 CV Price : € 9,50 Sign up here: [https://sportconnexions.com/nl/squash/tournaments/26818/](https://sportconnexions.com/nl/squash/tournaments/26818/) more info: ### Individual players This competition is for individual players. You can sign up without a partner. ### King of the Court Courts are assigned manually at the location. You play short matches of 19 points . The winners go up one court and the losers go down one court. ### Match format You play 19 points with point-a-rally. examples are 19-0/ 10-9 / 12-7 ### Waiting list When the competition is full, players can sign up for the waiting list. If a spot becomes available, we will send an email notification to the first player on the list. The player has 24 hours to claim the spot. After 24 hours the exclusivity expires and the next player on the waiting list will be notified. If a spot becomes available less than 48 hours before the event, we will notify all players on the waiting list. If a spot becomes available within 48 hours before the event, all members of the waiting list will be notified, and the first to respond will get the spot. ### Refund Your payment will be refunded if you cancel at least 3 days before the tournament starts. If you cancel later, you will receive a refund if we are able to sell your ticket. ### Courts Court 11, Court 12, Court 13, Court 19 and Court 20

**RSVP here via EventBrite [here](https://www.eventbrite.nl/e/you-and-your-brand-a-casual-networking-hour-tickets-1984283125243).** Expand your visibility. Join a casual online time to share about you, your brand and business, and learn more about other business owners, locally and globally. Share upcoming events and workshops, too. After each business owner gets the spotlight to share, we then move into a topic-oriented discussion. This month, the topic is begin chosen by [Isabella Maria Noguera, MSc](https://www.linkedin.com/in/isabellamarianoguera/) over of Be Your Brand Consulting. Every session closes with gratitude and a creative activity, so have a pen and paper, tablet, or something available in case we write/create/draw. **RSVP here via EventBrite [here](https://www.eventbrite.nl/e/you-and-your-brand-a-casual-networking-hour-tickets-1984283125243).** *-* *\*\*\*The only requirements are a minimum age of 18 years old, be a business owner or preparing to launch,* *and **at least three attendees** register to make it a worthwhile hour for everyone.\*\*\**

We’re back! On **May 21st**, PuXu returns to Acato in Utrecht for a meetup dedicated entirely to **Research**. **Speaker 1: Emmanuelle Savarit** Emmanuelle is a UX researcher with 20+ years of experience. She's built and led research teams at Facebook, Just Eat Takeaway, LSEG (Refinitiv), and Thomson Reuters. She ran her own UX research agency for 10 years. She's written two books, hosts the UX Research Club podcast, and now focuses on helping researchers increase their strategic impact, including navigating AI. In short: she knows what it takes to move research from tactical to strategic, and she's coming to Utrecht to talk about it. **Special Offer:** Emmanuelle is the author of *The UX Research Powerhouse*. As a PuXu attendee, you can [pre-order your copy](http://clicks.meetup.com/ls/click?upn=u001.NY3oBFzZ5LJDG7YcnfSAKt-2FPbu0mdbClRwu8GKKRoO80nKlP-2FLm90aUF5CQqytHZ3qPz_74u5-2F-2BkTZmgMdnIu03cC4mmjtImPovdZ1zhiEax5tCGl-2BX4fyxb41gNAMGCWV5p-2F3ZXnrHzXrYb-2FEX1gm6iU0hCqBeZf0X8TDiJ-2FF2Pb5b0AYKY0z73yUDJwsJeyVUq2KtnZTX6IPrsDNa2UkzczY3hKG3S2HRTZ-2F-2F-2B5qIwx3CPXatPQFxQ52SkLNZ5jtWr2BsPEXqg9XUqI4UVveDZFOzr6Jpxsj6HpP5WPTNn9JfRQGsEK6lvy8Funa0EQyQ5-2Fcs-2B47BimpzF-2BEXne3mS-2BZNzrupqrFFi2fX4yIrWqpynPk6sL8GL1wQYphmXVe60iss42yhd4nNcrL3QnxXpmXREmBBaQDTLdBvlEgh-2BlmcKlZdw6YOLqURK9zvY-2FZT5KaZSep0LjLq0ckOBsBXggyUAiy01ioYfPSic9ypG0U9487DG53iY3jWQMuNSrHZokvJpDhdJ90J3JwMV8sFus1jAghL1xl0LlFTEJpqn6t0IDZ1Yply0uZ5X2veN2tA6ExM9KeLmTIDEk7ps7HLzVl7BhlE3HPR0nzpsaeXQjsAOoU-2BnH0eHPtBMoFi4jTJ-2BzcDaUWHmnZT1Xq5B2aktBwrvpQR2rC-2B2F3HcHTn3UrTwP8UrRAlyo7TVk8S34miQEhNN6-2BmmpLC1LwWfU-2FC5CHRq0sQuuBynnS2qztg0oS1no5qCyhZ0QvtvBawQvEzT9) at a **15% discount** and get it signed during the event! **Speaker 2: Sabine Bakker** Sabine is an inclusive user research consultant at the Accessibility Foundation, supporting organizations with making their products and services accessible for users of all (dis)abilities. She knows the challenges that UX teams face in demonstrating their added value from her 10+ years of experience at the tech start-up Blendle, cybersecurity scale-up Zivver, and low-code SaaS Mendix. She now helps teams with gaining a competitive edge through inclusive research and co-creation “from a to y”. Her talk will point you to the importance of user experiences that are not reflected in the training data of LLMs and the “curb cut”-effects to be gained which no synthetic persona will provide. **Speaker 3: Bo Kusters** Service Designer at the Dutch Tax Administration. With millions of users, the team often sees the same generic functional and emotional needs recurring in their user research. To avoid reinventing the wheel every time, they developed an interactive, tarot-style card game. With this clever deck, they make complex user insights tangible, allowing internal teams to apply this data directly in their daily work. Learn during this session how to successfully translate abstract research data into a practical design tool that actually works for your team. **Event details** **When:** May 21 \| 18:30 – 22:00 **Where:** Acato, Oudegracht 231, Utrecht **Cost:** Free \(Includes snacks & drinks sponsored by Visma \| ProActive\) **Capacity:** 50 spots Stay tuned for more updates! Later this week, we’ll also share our *Utrecht Visitor Guide* for those traveling in to make a day of it. See you there!

Your monthly international comedy event in Nijmegen! Top European & UK headliners doing 1 night only in Nijmegen! Fancy some Thursday night laughs? Then come on over to Tierney’s Irish Bar & Restaurant for some top headline acts from the UK and European comedy circuits! It's our season finale and we are bringing you Adam Bloom (UK); a headliner who is one of Ricky Gervais' favourite comedian, one which actor Sir Ian McKellen could not wait to see live! His TV credits include: Mock The Week (BBC2), Never Mind The Buzzcocks (BBC2) & Russell Howard's Good News (BBC3). Get your ticket via Evenbrite/ Tix4All or link bleo: https://fienta.com/nl/international-stand-up-comedy-attierney-s-irish-bar-nijmegen Seats will be based on RSVPs, so let me (Sharon) know at the door if you want to be introduced to other meetup up members in attendance. Adam Bloom is undoubtedly one of Britain’s most exciting and original stand-up comedians. He has performed seven sell-out solo runs at The Edinburgh Festival, ranging from 1996 to 2007 and has also performed a twenty-nine date, sell-out tour of The UK. In 2004 Adam was part of Just For Laughs Comedy Tour, where he performed to over 42,000 people in 17 cities across Canada. He has also written & performed three series of The Problem with Adam Bloom for BBC Radio 4 (2003-2005). He has also provided additional material for over 130 other people, making him one of the world’s most prolific ghostwriters. Some of the people Adam has written for include an Oscar & BAFTA Nominee and four comedians who've given Royal Variety Performances. Plus support acts! Come early to get your seat and have have some delicious pub grub before the show. An hilarious monthly show featuring some top names, a great night out with friends, a date, you work crew or just come alone and meet other comedy fans. An hilarious monthly show featuring some top names, a great night out with friends, a date, you work crew or just come alone and meet other comedy fans.

In a world where new frameworks, tools, and trends seem to appear every week, it’s easy to forget where true technical strength and innovation come from: the fundamentals. At Back to the Future of Code, we invite developers to **explore the foundational building blocks behind modern software**. Three speakers will each offer a different perspective on these fundamentals and highlight why they’re still at the heart of great engineering. Talks: 🎤 **Frontend Framework Dependency: Are we skipping the hard part** → Ramona Domen (Software Engineer and Impact Leader) Ramona shows how modern frontend frameworks still depend on HTML, CSS, and JavaScript. And why mastering these foundations makes you a more deliberate and powerful engineer. 🎤 **Why Great Engineers Don’t Just Write Code** → Sarah Gruneisen (Engineering Leader & Leadership Coach ) Sarah’s talk highlights how many engineers, especially women, have their strategic and technical strengths overlooked in favor of their “people skills”. She reveals how those very skills drive real technical impact and invites us to broaden our definition of engineering excellence. 🎤 **Women in Tech: Bug or Feature?** → Maaike Wachters (Software Engineer) Maaike uncovers the hidden history of female tech pioneers whose groundbreaking ideas laid the foundation for the way we code and innovate today. **Program** * 17:15 – 18:00 Walk in and dinner (vegetarian options) * 18:00 Intro WeCode and KVK * 18:20 Talks and Q&A (in English) * 20:00 – 21:00 Snacks and drinks **Who should attend?** This event is especially designed to spotlight and elevate women’s voices in tech by giving them a place on the stage. Everyone is welcome to join. **How to get there** KVK is located at Sint Jacobsstraat 300, 3511BT Utrecht. (KVK has two buildings on the same street, so look out for number 300) * By car: Paid parking is available at Q-Park La Vie or Paardenveld. * By train: The nearest train station is Utrecht Centraal, about a 10-minute walk. * By bus: Take lines 1, 3, 6, 7 or 27 to bus stop Sint Jacobsstraat. * By bike: There are bike racks available close to the location. You need to bring identification because we're in a goverment building. (ID-card, drivers license, passport). **Change of plans?** Please cancel your RSVP so someone on the waiting list can take your spot. Thank you! **Photography** We will be taking photos during the event to capture the atmosphere and share highlights afterward online. If you’d rather not be photographed, let our team know. **Questions** If you have any questions or need special accommodations, please contact us at wecode@kvk.nl.

Hi all, We’re back at Mick O’Connells and ready for another strong evening! We’ve got our own space again. Walk in, turn right at the bar, head past the dart boards, and you’ll find us in the side room. We've introduced a simple rotating format that gives you the chance to actually speak with everyone in the room. Short, focused conversations, good energy, and a lot more fun than it sounds. We’ll throw in a few conversation topics to get things going, but how you use the evening is entirely up to you. Come with intention, or don’t. Talk business, find clients, meet future partners, make friends, or just unwind with people who get it. We’re all building something, and we all have to roll with the punches. Only rule: you’re an entrepreneur, freelancer, or about to become one within the next 3 months. If not… the clock starts now ;) Try to arrive on time so we can kick things off properly. The activities start at 20:00! Can't find us? Look for the grey Gnome. He’ll guide you better than any sign ever could. See you there.

(english/german below) **Bitcoin Pizza Dag!** Op 22 mei 2010 betaalde programmeur Laszlo Hanyecz 10.000 BTC voor twee pizza's — de eerste gedocumenteerde aankoop met bitcoin. Hij plaatste een bericht op een forum waarin hij BTC aanbood voor pizza; een andere gebruiker ging akkoord, bestelde de pizza's en leverde ze af. Die transactie werd later bekend als "Bitcoin Pizza Day". Laszlo bewees dat Bitcoin als ruilmiddel gebruikt kan worden. **Sluit je bij ons aan voor pizza-avond bij De Pizzabakkers! (vanaf 18:00)** RSVP zo snel mogelijk; we moeten reserveren bij De Pizzabakkers en er is beperkte plek. Zorg dat je je geladen Lightning-wallet meeneemt! *** **English: Bitcoin Pizza Day!** On May 22, 2010, programmer Laszlo Hanyecz paid 10,000 BTC for two pizzas — the first documented purchase using bitcoin. He posted on a forum offering BTC for pizza; another user accepted, ordering pizzas and delivering them. That trade later became famous as "Bitcoin Pizza Day," Laszlo proved that Bitcoin can be used as a medium of exchange. **Join us for pizza diner at De Pizzabakkers! (from 18:00)** Please RSVP as quick as possible as we need to make a reservation at De Pizzabakkers and there is only limited space. Be sure to bring your loaded lighting wallet along with you! *** **Deutsch: Bitcoin Pizza Tag!** Am 22. Mai 2010 zahlte Programmierer Laszlo Hanyecz 10.000 BTC für zwei Pizzen — der erste dokumentierte Kauf mit Bitcoin. Er postete in einem Forum und bot BTC für Pizza an; ein anderer Nutzer akzeptierte, bestellte die Pizzen und lieferte sie aus. Dieser Tausch wurde später als "Bitcoin Pizza Day" bekannt. Laszlo bewies, dass Bitcoin als Tauschmittel verwendet werden kann. **Begleite uns zum Pizza-Abend bei De Pizzabakkers! (ab 18:00)** Bitte antworte so schnell wie möglich; wir müssen bei De Pizzabakkers reservieren und es gibt nur begrenzten Platz. Nimm unbedingt deine geladene Lightning-Wallet mit!

Come along, lovely queer hikers! 🌿✨ This time we’re serving an easy-going queer nature moment with a short loop through **Landgoed Heidestein** near Zeist. Think dreamy forest paths, shimmering fens, a peaceful forest pond, and heather fields - a lot of diversity for such a short walk :) We’re teaming up with **Cocktail (COC’s group for LGBTQIA+ refugees & asylum seekers)** for this event, so besides soaking up nature, we’re creating space for connection, sharing stories, and learning from each other’s journeys and experiences. Expect a vibe that’s part hike, part picknick, part wholesome community exchange. 🌈 Bring your snacks and blankets, as we’ll pause along the way for a relaxed picnic moment together. Because queer joy isn’t just about where we go, but who we walk with. 💖 **Practical info** 📏 **Distance:** 5 or 7 km (loop walk) 📍 **Start:** Bus stop Prinses Margrietlaan, Zeist (5km option) Driebergen-Zeist station (7km option) 🏁 **End:** Back at the starting point 🥾 **Level:** easy - chill pace 🤝 **Meeting point:** outside the train station **Driebergen-Zeist at 13:45** or bus stop **Prinses Margrietlaan (Zeist) at 14:20** ❗You’re welcome to join from another direction. If you come by car you can park at P+R Driebergen-Zeist. Please note: we published this hike with Cocktail simultaneously, which is also why we lowered the participant number from Hiking Queer NL's side. Pack your: 🍱 snacks 🚰 water 🧥 rain coat/umbrella ☀️ sun screen 🏳️‍🌈 anything else you might need ❌ If you signed up and cannot make it in the end, please cancel your RSVP attendance so we know how many people will show up and someone else can take your place instead. 💗 A voluntary donation helps us to keep the Meetup group up and running :) you can either pay via a Tikkie or in cash after we finish the hike. *Hiking Queers Netherlands & Cocktail (COC)*

**Speeddaten Utrecht** Al twaalf jaar organiseren we speeddates in Utrecht. Ontmoet je graag een groot aantal singles in korte tijd, dan is speeddaten iets voor jou! Tijdens een speeddate heb je ongeveer 15-20 dates van 4 minuten. Wanneer de bel klinkt, schuift de helft van de singles door naar de volgende tafel. Op je datekaart geef je aan met wie je verder in contact wilt komen. **Locatie** Het speeddaten vindt plaats bij [Anne&Max Domstraat](https://www.annemax.nl/vestigingen/utrechtdomstraat/), een sfeervol en ruim opgezet restaurant. We hebben een apart gedeelte van het restaurant gereserveerd, zodat je alle privacy hebt tijdens het daten. **Matchmail!** Binnen een dag na de speeddate ontvang je van ons een e-mail met de voornaam en het e-mailadres van de singles met wie je een match hebt. Heb je bij alle deelnemers ‘nee’ ingevuld? Dan is je volgende speeddate [gratis](https://aboutlove.nl/geen-klik-volgende-speeddate-gratis/)! **Kom je ook speeddaten bij About Love?** Heb je zin in een avond vol ontmoetingen in Utrecht? Schrijf je dan nu in voor deze speeddate! Bij About Love ben je in goede handen; wij zijn een ervaren speeddate-organisatie met uitstekende [recensies](https://aboutlove.nl/is-speeddaten-leuk/) en bieden speeddates aan voor de laagste prijs. Date je mee? >> [https://aboutlove.nl/event/details/speeddaten-utrecht-hogeropgeleid/](https://aboutlove.nl/event/details/speeddaten-utrecht-hogeropgeleid/)

Join us for a relaxed and friendly matcha tasting meetup. I’ll bring matcha for everyone to try, and you’re welcome to bring your own snacks and drinks, including alcohol if you like. This is a casual event for meeting new people, enjoying Japanese tea culture, and spending a cozy afternoon together. Beginners are very welcome. Free to join.

Maki-e is a traditional Japanese lacquer decoration technique. Techiniques are involved drawing pictures, patterns, and letters on the surface of lacquerware using lacquer, and then sprinkling and fixing metal powder, such as gold or silver, onto the surface. In our workshop, you have the opportunity to create maki-e designs using traditional Japanese patterns (wagara) or your own original designs. Then your canvas can be a glass cup or a glass picture frame. Join us for this unique Japanese art workshop in Utrecht. * Place: CLAY TO PLATE Biltstraat 55, 3572 AG, Utrecht * Price: three options you can choose from €56 pp(for a glass cup) €60 pp (for a glass picture frame) €76 pp (for a lacquerwares) Limited seats available. **Booking is essential for adequate preparations. If you've enrolled/registered on the Meetup app, we'll contact you through the app message. Kindly communicate with us accordingly, and refrain from showing up without prior contact. We appreciate your understanding** Website:[https://japanworkshopnet.com/ ](https://japanworkshopnet.com/) [MAKI-E workshop info](https://japanworkshopnet.com/maki-e-workshops/) Email: info@japanworkshopnet.com Mobile:0616059840

**Modern and Authentic kintsugi workshop in Utrecht.** Choose from three options: * 1-Day Modern Kintsugi workshop-€60 * 2-Day Modern Kintsugi workshop-€96 * 4-Day Authentic Kintsugi workshop -€180 For all details, please visit my website. [https://japanworkshopnet.com/upcoming-workshops/](https://japanworkshopnet.com/upcoming-workshops/) Location: **CLAY TO PLATE** [Biltstraat 55, 3572 AG, Utrecht](https://www.claytoplate.com/) **Booking is essential**. Please contact me if you would like to participate in the workshop. Email: info@japanworkshopnet.com Mobile:0616059840

ASH is Atheists, Skeptics and Humanists of First Unitarian Universalists of Columbus Ohio TBD Snacks are usually available, and you are welcome to bringing something to share!

**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** Like it or not, AI agents are now capable of turning a quickly written paragraph of requirements into a pull request that is ready to be integrated into real-world production applications and it's now our responsibility to make sure AI doesn't go rogue and take down prod - or corrupt our data by misunderstanding the requirements or our existing schemas. In this session we'll explore strategies to protect our codebases through unit and integration testing, documentation, and code review along with additional ways of providing context and guard rails to our AI agents as they carry out the work we've assigned them to do. By the time we're done, you'll have a firm grasp of the problem and understand some helpful options for protecting your codebase from vibe coding mishaps getting YOLOed into prod. **YouTube Link** TBD