Data Architecture

\# 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**. # **Title**: The President’s Cake **Language**: Arabic **Subtitles**: English **Length**: 106 min **Director**: Hasan Hadi **More info**: https://www.focusarnhem.nl/agenda/english-subs-the-presidents-cake/ **Ticket link**: https://www.focusarnhem.nl/tickets/144299/ **Synopsis:** In poverty-stricken 1990s Iraq, young Lamia is selected to prepare a cake for the President’s birthday. Because basic ingredients are hard to find, Lamia goes on a journey in search of eggs, flour and sugar. It becomes a tender, tragicomic odyssey, offering a child-eye’s view of life under authoritarianism. Hasan Hadi’s affecting debut feature follows 9-year-old Lamia. She is tasked with bringing a cake to school for the President’s mandatory birthday celebration. Against a backdrop of crippling poverty and food shortages, she journeys from her marshland home to a nearby city in search of ingredients. Coming along with her are her grandmother Bibi, her best friend Saeed and her beloved pet rooster Hindi. Shot on location in Iraq with nonprofessional actors, this tender, tragicomic odyssey offers a poignant child’s-eye view of life under authoritarian rule. The film was inspired by Hasan Hadi’s childhood memories of 1990s Iraq under Saddam Hussein, and was awarded the Caméra d’Or at Cannes for best first feature. **How it works**: I will be at Focus around 18:30, where we can meet before the movie starts. You can message me to find us. Screening starts at 19:00. After the movie, we can have a drink together. Hope to see you soon!

⚠️ **Important Note:** *PyData Amsterdam is transitioning to Luma.* ✨ * *Please [subscribe](https://luma.com/pydataamsterdam?k=c) to PyData Amsterdam on Luma:* https://luma.com/pydataamsterdam * *And register at the Luma [link](https://luma.com/j9kvw2dk) for this event:* https://luma.com/j9kvw2dk \-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-\- Join our May’s edition meetup on **Wednesday, May 20, 2026** at **Adyen Amsterdam office**, for an evening dedicated to the engineering of high-scale, real-world AI systems. We will explore how Apache Flink powers resilient, real-time features within Adyen's payment engine and dive into the architecture of building a self-hosted AI stack designed for absolute data sovereignty and cost control. This is a great opportunity for data scientists, ML engineers, and software engineers to network and learn about cutting-edge MLOps practices at a global payments company and within a fully self-hosted AI stack. Note: To ensure a smooth check-in process, please register using your full name and bring a valid ID card to the venue. **Agenda:** 17:30 - 18:25: Walk-in with drinks & food 🍺🍕 18:25 - 18:30: Adyen’s intro 18:30 - 19:15: Talk 1: Accelerating and protecting shoppers payments with Apache Flink at Adyen 19:15 - 19:45: Break 19:45 - 20:30: Talk 2: From Notebook to Living Room: Building a Self-Hosted AI Stack That Replaces SaaS 20:30 - 21:00: Networking / drinks **Talk 1:** *Accelerating and protecting shoppers payments with Apache Flink at Adyen, by Vitalii Zhebrakovskyi and Matteo Tonelli* Data Scientists at Adyen have for a long time developed and constantly improved ML models that are utilised at various stages of payment processing. Would it be fraud detection, payment schemas routing optimization, bot attacks detection or payouts, ML has consistently proven to deliver better results than traditional rule-based manually configured tools and has become a core driver of growth for the business. With growing adoption of ML, the demand for model features has been steadily on the rise. Having these features custom built and refreshed daily stopped being sufficient, easy to build and realtime features that could be used reliably at global scale became a necessity to improve the product. In this session the team behind Adyen Feature Platform will present how Apache Flink is used in the core of Adyen's payment processing engine. On top of Adyen’s Global Managed Flink Platform, to provide resilience in the face of disaster, so that ML models can rely on their features being fresh. Vitalii Zhebrakovskyi is Senior Software Engineer at Adyen working in fraud prevention and MLOps fields. He's the major contributor to Adyen's Feature Platform with primary focus on stream processing with Apache Flink. His career spans over more than 20 years and a wide variety of domains and languages with lately focusing on Java and Payment Processing field. Matteo Tonelli is a Software Engineer at Adyen focusing on streaming. In his journey at Adyen, he has been mostly working on enabling machine learning scientists to train, deploy and monitor their models, providing them with data their model needs, when they need it. **Talk 2:** *From Notebook to Living Room: Building a Self-Hosted AI Stack That Replaces SaaS, by [Calogero Zarbo](https://nl.linkedin.com/in/calogero-zarbo-10467925)* Most data scientists interact with AI through managed notebooks and APIs, but what happens when you want full control over your models, your data sovereignty, and your costs? In this talk, I'll walk through the architecture of a self-hosted local AI stack running on consumer hardware (RTX 5090), accessible securely via Tailscale VPN, and serving multiple concurrent users. We'll cover the core engineering decisions behind ditching Ollama for direct llama.cpp integration to eliminate abstraction taxes, and building a custom FastAPI scheduler for dynamic model switching between heavy reasoning models (DeepSeek-R1 70B) and agile assistants (Qwen3.6). Crucially, we'll dive into architectural pivots born from real bottlenecks: how our initial "always-loaded" CPU-only utility server for tool routing created blocking latency that killed chat responsiveness, forcing a redesign toward async decoupling via Redpanda/Kafka and targeted API offloads. We'll also touch on the broader infrastructure layer—systemd service chaining, Docker networking, and replacing SaaS project management with self-hosted alternatives like Huly, Joplin, and WorkAdventure. This started as a hobby, but quite rapidly grew into an application of advanced engineering principles to personal infrastructure. You'll leave with concrete patterns for local model serving, knowing when to kill components that look good on paper but fail in practice, and how to build resilient AI tooling you actually control. Calogero, in short Cal, is the Head of Advanced Computing at Sandbox Wealth, where he leads AI, ML, and quantum computing strategy for fintech applications. With over 15 years across computational biology, e-learning, and data science consulting, Cal has shipped production systems for clients including Satispay (where he pioneered Italy's first quantum-classical hybrid optimization in fintech using D-Wave) and Artefact. He co-founded Algoritmica.AI - an AI venture for credit risk assessment that was acquired in 2021 - and currently lectures on Quantum Machine Learning at Ca' Foscari Challenge School in Venice. When not building enterprise AI systems, Cal architects his self-hosted home lab to replace every SaaS subscription he can find. **DIRECTIONS** Address: Simon Carmiggeltstraat 6-50, 1011 DJ Amsterdam The event will be held at the Adyen SC office event space, which is just a seven-minute walk from Amsterdam Central Station. Please enter through the main entrance (the revolving doors) and collect your visitor badge at the reception desk. Note: To ensure a smooth check-in process, please register using your full name and bring a valid ID card to the venue. **Note: To ensure a smooth check-in process, please register using your full name and bring a valid ID card to the venue.**

Studenten binnen de zorg opgelet (Geneeskunde, MBO/HBO Verpleegkunde)! Voor het lustrum van de Universiteit Utrecht organiseert het Journal of Trial and Error samen met het UMC Utrecht de **Failure88**. Iedereen maakt fouten, al geven we ze liever niet toe. Wat daarbij niet helpt is dat binnen zorgopleidingen veel sprake is van prestatiedruk. Met de Failure88 helpen we daarom het falen normaliseren. De Failure88 is een variant van de Crazy88, waarbij deelnemers zoveel mogelijk opdrachten volbrengen. Deelnemers sturen foto’s en video’s om te laten zien dat de opdracht is uitgevoerd. Maar bij de Failure88 is er een twist: je krijgt niet alleen punten als de opdrachten zijn gelukt, maar ook al als je een goede poging hebt gedaan. En er valt iets te winnen! Voor de winnende groepjes is het volgende prijzengeld: * 1e plaats: €400,- 2e plaats: €200,- 3e plaats: €100,- De aftrap van de Failure88 is op 6 mei, en de inzendingen sluiten na 17 mei. De prijsuitreiking is op 20 mei vanaf 17:30 in het Louis Hartlooper. Deze avond is een samenwerking met Blik op de Zorg (UMC Utrecht). Na de prijsuitreiking volgt een gratis vertoning van de film Whiplash. Aan de hand van deze film voeren we een gesprek over prestatiedruk in de zorg. Alleen meedoen aan de Failure88 is ook mogelijk. Schrijf je hier in: https://trialanderror.org/lustrum-failure-88-2026

So, you have experienced what improv is like? And you want to play and learn more? In this longer course you learn more about the basic techniques and mindset of improvisation, through fun and easy games. You will: • explore playfulness • listen with intent • accept making mistakes, • discover your imagination and creative thinking, • build confidence, • improve your communication skills, with and without speaking • and mostly: have fun! ### Course details course Wednesdays 20 May – 8 July 2026 lessons 19:30-21:30 . Location ZIMIHC Wittevrouwen. bouwstraat 55 Utrecht. Teacher Burgert Kirsten Show in june. 10 lessons including a show €245 incl BTW ### ### 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/courses

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

Join in for a some drinks (and food, if you want) after work at **The 5th \| Utrecht**. Bring your own project and payment for drinks. As evenings tend to be a bit busier, we'll reserve a table. This means: **Only sign up if you are sure you will come!** And if there's no space left on the event, please don't join spontaneously. \-\-\-\-\- As always, we talk about our projects, exchange tipps, but also just get to know each other and enjoy a drink after a long day in good company. Whether it's knitting, crocheting, stitching, origami, or something more unique, we're looking forward to seeing you!

De Test Automation Days 2026 zijn net een maand voorbij, maar wij zijn er nog niet klaar mee. Tijd voor de aftermatch, maar dan op onze eigen manier. Zoals altijd georganiseerd door deTesters, TestCoders en TechChamps, in ons kantoor in de Werkspoorkathedraal in Utrecht. Deze keer halen we twee Test Automation Days talks naar Utrecht die mooi laten zien hoe breed en interessant ons vakgebied inmiddels is. Met Wim Selles van TechChamps en Anaïs van Asselt, oud-collega van deTesters en nog altijd een vriendin van de show, belooft dit weer een avond te worden vol praktijkverhalen, nieuwe inzichten en genoeg om over na te praten. Een leuk detail: ze komen allebei oorspronkelijk uit Kampen, hebben allebei bij deTesters gewerkt en hebben door de jaren heen regelmatig op dezelfde events gestaan, alleen nooit tegelijk op hetzelfde podium. Twee talks, twee totaal verschillende invalshoeken, maar allebei relevant voor iedereen die serieus bezig is met kwaliteit, test automation en hoe we slimmer kunnen werken. **When Mobile Testing Hits Harder Than You Expect** Mobile testen lijkt in eerste instantie veel op web testing. Totdat je te maken krijgt met trage builds, verschillende devices, instabiele testen en feedbackloops die ineens dagen kunnen duren in plaats van seconden. In deze sessie laat Wim zien waarom mobile testing in de praktijk vaak veel complexer is dan teams vooraf verwachten. Aan de hand van herkenbare situaties neemt hij je mee langs de punten waar mobiele projecten vaak vertragen, vertrouwen verliezen of kwaliteit onder druk komen te staan. Daarnaast laat hij zien hoe de juiste combinatie van handmatig testen, automation en inzichten uit de praktijk helpt om betere mobiele releases te maken zonder de controle kwijt te raken. **Wim Selles** Wim is directeur bij TechChamps. Daarvoor werkte hij bij SauceLabs als (Lead) Solutions Architect en Staff Product Manager. Altijd met een focus op Mobile, dus Wim mag met een gerust hart ''mister-mobile'' worden genoemd. Wim deelt graag zijn Mobile test automation ervaring als spreker op diverse conferenties en tijdens trainingen en workshops. **Feedback as Fertiliser: From Sh\*t to Quality Through AI and Knowledge Automation** Veel waardevolle feedback verdwijnt sneller dan we zouden willen. Bugs worden gesloten, incidenten raken vergeten en productvragen verdwijnen in losse tools of gesprekken. Zonde, want juist in al die informatie zit een schat aan kennis die kan helpen om kwaliteit structureel te verbeteren. In deze sessie laat Anaïs zien hoe je met AI, RAG en low code automation van al die losse signalen iets bruikbaars kunt maken. Denk aan een levende kennisbank, slimmere inzichten in risico’s en een betere manier om QA inspanningen te prioriteren. Niet door nóg meer handmatig werk toe te voegen, maar juist door feedback slimmer te organiseren en opnieuw te gebruiken. Een verhaal dat laat zien hoe je van ruis weer richting kunt maken, en hoe een duurzaam QA ecosysteem zichzelf steeds verder kan verbeteren op basis van wat er al gebeurt. **Anaïs van Asselt** Anaïs is Senior QA bij Choco. Voor veel mensen in onze community is zij geen onbekende naam, vooral omdat zij een graag geziene spreker op diverse Test (Automation) conferenties. Ze werkte eerder bij deTesters en is sindsdien eigenlijk nooit echt weggeweest. Anaïs staat bekend om haar praktische blik op kwaliteit en haar talent om technologie, automatisering en teamdynamiek slim bij elkaar te brengen. **Doelgroep** Deze meetup is interessant voor testers, QA engineers, developers en iedereen die bezig is met kwaliteit in moderne software teams. Deze avond is **volledig in het Nederlands (Dutch spoken).** **Programma** 17:30 Ontvangst en eten 18:30 Performance Testing as a Pipeline Essential 19:30 Korte pauze 19:45 Feedback as Fertiliser: From Sh\*t to Quality Through AI and Knowledge Automation 20:30 Q&A en discussie 21:00 Afsluiting met een borrel

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!

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!

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)*

## Love is in the air…! Experiencing dating burnout? You're not alone. If you like deep conversations and are finally ready to get out and meet people irl, you've come to the right place! **No more swiping, skip the bad dates!** Due to the increasing size of our waiting list, and as per your frequent requests, this is our answer to you with a second event within Utrecht this May! ### *This is how it works:* * Before you arrive at the meetup, you fill in a fun 5-10 minute questionnaire on [affinitee.eu](https://affinitee.eu/au-event-5) (if you haven't already). We explore different aspects of relationship compatibility using this questionnaire. * The first one hour will be spent playing icebreaker games that are meant to induce deep conversations and to explore personality traits that don't usually show up in the first stages of a date. * We will then move on to try out a multitude of board/card games that are specifically chosen to explore various aspects of relationship compatibility (moral/political values, decision making skills, personal icks etc.) * You will have a chance to interact with everyone at the event. Towards the end of the event, you will also have an opportunity to share your contact details with one other person through our matchmaker. But you're of course welcome to connect with others on your own accord. * Our attendees typically report having had a wonderful evening having explored a multitude of deep philosophical conversations and leave with the fulfillment of having had met some interesting personalities (romantic & otherwise). So if this is what you're looking for, we guarantee that you'll not leave disappointed. **[!!IMPORTANT!!]** We recommend signing up through our website to check for compatibility against other participants. This also allows you to connect with a larger audience outside the event who're in search of better relationships. We believe in conscious, compatibility based matchmaking. Don't waste your time dating the wrong people!

(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!

**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.\*\*\**

The June Ohio North Database Training user group meeting will be held on **June 2nd, 2026 at 5:00PM**. This will be a **HYBRID** event and we will be joined online by **Sam Nasr.** You're welcome to come meet in-person at our meeting location, the offices of Improving at **[6000 Freedom Square Dr,](https://www.google.com/maps/place/Improving/@41.4004167,-81.6614462,17z/data=!3m2!4b1!5s0x8830e5b8255c5919:0xd8297060eb68fe04!4m6!3m5!1s0x8830dc7a0fe35dc9:0xbfc4710ecadfc5c!8m2!3d41.4004127!4d-81.6588713!16s%2Fg%2F1hm3hkqp3?entry=ttu&g_ep=EgoyMDI1MDQzMC4xIKXMDSoASAFQAw%3D%3D)** **[Unit 110,](https://www.google.com/maps/place/Improving/@41.4004167,-81.6614462,17z/data=!3m2!4b1!5s0x8830e5b8255c5919:0xd8297060eb68fe04!4m6!3m5!1s0x8830dc7a0fe35dc9:0xbfc4710ecadfc5c!8m2!3d41.4004127!4d-81.6588713!16s%2Fg%2F1hm3hkqp3?entry=ttu&g_ep=EgoyMDI1MDQzMC4xIKXMDSoASAFQAw%3D%3D)** **[Independence, OH 44131](https://www.google.com/maps/place/Improving/@41.4004167,-81.6614462,17z/data=!3m2!4b1!5s0x8830e5b8255c5919:0xd8297060eb68fe04!4m6!3m5!1s0x8830dc7a0fe35dc9:0xbfc4710ecadfc5c!8m2!3d41.4004127!4d-81.6588713!16s%2Fg%2F1hm3hkqp3?entry=ttu&g_ep=EgoyMDI1MDQzMC4xIKXMDSoASAFQAw%3D%3D)** [Teams Link ](https://teams.microsoft.com/meet/215625630917731?p=vxNb3zudhNj0S6Cg0v)if anyone needs it after RSVP-ing for in person. If you would like to subscribe to our email list outside of Meetup, we have changed platforms recently and you will need to register [here in Kit ](https://ohio-north-data-training.kit.com/b8f036f615)instead to receive emails. Agenda: **5:00 PM EST**: Online and in-person meeting begins with a social hour. This is an unstructured hour where you can join us to catch up and meet other group members before the session starts. There will be food brought in for in-person attendees. **6:00 PM EST**: Elections, announcements, followed by our feature presentation. See below for presentation details. **7:30 PM EST**: Optionally after the main presentations, the in-person crowd may go out for snacks and drinks at a local establishment. We hope to see you there! Session Abstract ### SQL Server 2025: The Developer’s Revolution Explore SQL Server 2025’s new dev features -JSON type, Regular Expressions, and Change Event Streaming for real-time pipelines. See how REST API and Data API Builder turn your data into secure, high-performance APIs. Packed with demos, this session is perfect for developers, DBAs, and architects \*Please note, that we will be using Microsoft Teams for the online portion of this meeting. You may want to join a few minutes early to ensure you do not have any issues. If you are attending in person, there are large TVs at the office, and you do not need to bring a laptop or use Teams.

**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

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.

**Abstract:** This is a practical playbook for building a production-grade data lakehouse. It walks through foundational principles — naming conventions, least-privilege access, automated CI/CD testing — before diving into medallion architecture. Furthermore, metadata-driven design patterns show how configuration tables and dynamic notebook orchestration eliminates hard-coded pipelines. The deck covers star schema modeling, guidance on choosing between Spark, Pandas, and SQL, and data quality enforcement using DQX with YAML data contracts. Finally, we dive into security best practices and performance optimizations. **Host:** Justin Shea, Mehdi Jeddi, Erik Pak, and Sou-Cheng Choi **Talk Format:** This is a hybrid event. To attend online, join us on Zoom here at 6pm: https://iit-edu.zoom.us/j/89379230295?pwd=NdETyE5sdYuSrvsrBZXSBFkUESBVkg.1 Meeting ID: 893 7923 0295 Passcode: 5t5WYn **Sponsor:** Adyen, UIC College of Business, and PyData Chicago co-host this event. UIC will provide the meeting site. Adyen will sponsor pizza and soft drinks for the onsite participants. **Address:** University of Illinois - Chicago, Douglass Hall, Room 220, 705 S Morgan St, Chicago, IL 60607 **Logistics:** “UIC Douglass Hall” is recognized on Google Maps, which can guide you through campus. Once you arrive, proceed to the second floor, room number 220

QA or the Highway is a one-day, affordable, regional, professional conference featuring real-world experience and thought leadership in the QA and testing industry. This is a ticketed event please register here: https://www.qaorthehwy.com/ Featured Keynote Speakers: **Matthew-Hope Eland** **(Wizard at Leading EDJE)** \- An AI Specialist and Wizard at Leading EDJE who is known to teach software engineering\, AI\, and data science concepts in the most ridiculous ways possible\. Matt has used machine learning to settle debates over whether Die Hard is a Christmas movie\, reinforcement learning to drive the behavior of digital squirrels\, data analytics to suggest improvements to his favorite TV show\, and AI agents to play board games and create an AI agent with the personality of a dog\. Matt is the author of "Data Science in \.NET with Polyglot Notebooks" and "Refactoring with C\#" as well as several LinkedIn Learning courses\. Matt helps organize the Central Ohio \.NET Developer Group\, runs several blogs and a YouTube channel\, has a Master’s of Science in Data Analytics\, and is a current Microsoft MVP in AI and \.NET\. **Tatyana Arbouzova** **(CEO at Innovate QA)** \- Tatyana Arbouzova is an engineering and business leader with a strong background in Quality Engineering across multiple industries\, including Big Tech\, Healthcare\, and Entertainment\. She has held leadership roles at world\-class companies such as Microsoft\, VMware\, Disney\, and The Pokémon Company International\, where she focused on building quality\-driven cultures and scaling teams to deliver high\-impact products\. With decades of experience\, Tatyana has helped organizations transform their quality practices so teams can deliver software efficiently\, confidently\, and with measurable business outcomes\. Today\, Tatyana advises software companies on adopting AI to optimize quality practices and improve how software is delivered at scale\. She is also a passionate community builder and the founder of Innovate QA\, a thriving Seattle\-based community and conference for quality professionals\.

NFT's are here to stay folks! This is a group for like minded people interested in understanding, leveraging, using, creating for, profiting from, trading too i suppose, NFT's.. everything around them, complexity, fear and exploits, best practices and more. **PLUS** This group will talk AI ART tools, techniques, artists, video, audio, prototypes and more in the AI assisted production space- ART specifically, but we can get into any aspect of some of the cooler things happening in AI in general.