Computer Networking

Parking: Please use public transport if possible. If arriving by car, use a P+R or park at the Jaarbeurs parking (paid). Public Transit: 5 minute walk from Utrecht Central station **Event Schedule** **17:00** — Doors open & walk-in **17:30** — Dinner **18:30** — Welcome *Atanas Aleksiev — Rabobank Engineering Services AWS team* **18:35 -** Disasters don’t announce themselves—and recovery is only as good as your last backup strategy *Rabobank Engineering Services AWS team* **19:10 -** From Innovation to Enterprise: Scaling a Compliant, Microservices-Driven AWS Platform *Rabobank ODP Next team* **19:50** \- Break ☕ **20:00 -** EDSN as the Digital Backbone of the Energy Market: Use Case, Technology Choices and Challenges *Energie Data Services Nederland* **20:40** \- Drinks & Networking 🍻 **21:30** -Event ends **Summary of the talks** **Talk 1:** In this talk, we’ll walk through how Rabobank designs for failure using AWS Backup: from automated policies and immutable vaults to restore testing and ransomware protection. Because resilience isn’t just about having backups—it’s about knowing they work. **Talk 2:** What happens after an innovation delivers a promising platform before it’s ready for enterprise scale, governance, and speed? That’s where our journey begins. You’ll hear how we evolved the architecture to support over 100 microservices powering digital lending on a compliant-by-design AWS environment. We’ll share the decisions we made along the way: what we kept and what we changed. Central to our approach is Infrastructure as Code to enable consistency, repeatability, and control on the platform. We’ll show how this foundation helped us automate operations, accelerate delivery, and meet strict compliance requirements. Join us to learn how to bridge the gap between innovation and enterprise readiness, turning a promising start into a scalable, secure, and developer-friendly platform. **Talk 3:** EDSN acts as the digital backbone of the energy market, supporting essential data exchange processes across the energy market value chain. We explore this role, the underlying IT foundation, and the challenges and trade-offs that come with it.

Tijdens de maakavonden van Meet Je Stad soldeer je je eigen meetkastje dat temperatuur, luchtvochtigheid en fijnstof\* kan meten. Het solderen is geschikt voor iedereen: van beginner tot expert! Daarnaast bieden we begeleiding, dus hoef je niet bang te zijn dat je er niet uit komt. Ter deelname betaal je €15 voor de materialen. Vaak lukt het niet om al het soldeerwerk binnen één avond af te krijgen, maar dit is geen probleem; tijdens onze volgende maakavonden kun je langskomen om je werk af te maken. Inmiddels zijn er in de stad Utrecht nu zo’n 150 mensen die hun eigen meetkastje hebben gesoldeerd. Als je kastje af is wordt hij geregistreerd en kun je hem bij jou thuis ophangen/neerzetten. Hierbij krijg je instructies zodat je de juiste locatie kunt kiezen en je metingen zo betrouwbaar mogelijk zijn. Als het dan eenmaal hangt kun je via de kaart op de [website van Meet Je Stad](https://meetjestad.net/index3.php?loc=Tb) bijhouden welke metingen je kastje neemt: zo kun je bijvoorbeeld zien op welke momenten het bij jou het warmst is en vergelijkingen maken met waardes van andere meetkastjes. Dat kan door middel van [deze tool](https://mjs-datavisualisation-fez7kynngq-ez.a.run.app/) die je helpt om grafieken te maken. Dan kan je er achter komen hoe jouw omgeving ervoor staat in vergelijking met de rest van de stad. Meet Je Stad organiseert ook kennisavonden met gastsprekers die vertellen over hitte, fijnstof en andere burgerinitiatieven in de stad. Dit zijn ook gelijk geschikte momenten voor deelnemers om met elkaar in discussie te gaan over hun metingen en ondervindingen. Zo hopen we een netwerk van betrokken inwoners te creëren en meer te weten te komen over de milieuomstandigheden in de stad! *\*De fijnstofsensor is optioneel en kost 20 euro extra. Indien je deze bij je meetkastje wilt moet je deze via een draad met een stroombron binnen 15 meter kunnen verbinden.* **Organisatie:** Milieucentrum Utrecht (MCU) in samenwerking met de Makerscommunity HaHaHo. **Locatie:** Bibliotheek Neude, Huis van Actief Burgerschap (begane grond) **Kosten:** 15 euro voor materiaalkosten, 20 euro extra voor fijnstofsensor. (Meet-up suggereert bij het aanmaken van een account dat een betaald abonnement vereist is. Dit is niet zo, op de pagina waar gevraagd wordt om een abonnement te kiezen staat rechts bovenin de optie "Ga door met het gratis plan".) *Bij te weinig aanmeldingen kan de workshop afgelast worden.*

Time for our biweekly peer Satsang gathering! This is an open, equal and low-key gathering for spiritual seekers from all walks of life to get together, talk, feel connected and grow. The gathering will last for about two hours. Bring questions, thoughts, or just your presence. We'll see what unfolds once we're there. If you're interested but can't make the currently indicated time, the event is full or you have any other questions, get in touch with me at thijshugenholtz@gmail.com and we'll see what we can do! Location: Buurtcentrum Hart van Noord, Trumanlaan 60 Utrecht but the entrance is opposite Geallieerdenlaan 24

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

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

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

*A quick introduction* of Sheila Ghosh: System architect for the EDI system in the Netherlands. Started in 2000 as an architect for the Dutch government and was the architect for the first version of DigiD and MijnOverheid. Bio below, more on [LinkedIN](https://www.linkedin.com/in/sheilaghosh/). *A quick introduction* of Henk van Cann: KERI Foundation, KERICONF 2026 and onwards, contributing to LFDT-TrustoverIP with documentation and educational resources. Lagos, Portugal, and Haarlem, The Netherlands Bio below, more on [LinkedIN](https://www.linkedin.com/in/henkvancann/). **Meetup – Comparing SEDI and the KERI Protocol with the eIDAS-based EUDI Wallet Model** *(KERISuite: Free Open-source Identifier Systems Software under TrustoverIP Foundation that is anchored in LFDT)* Monday June 29, 7:00 PM Amsterdam area (exact location to be announced) A meetup about SEDI and its supporting KERI protocol, and how this compares to the EUDI Wallet (eIDAS-based) that will be introduced across Europe. ### In short * **SEDI** = Model legislated in the State of Utah (US): *State-Endorsed Digital Identity*. The state endorses a digital identity, while the citizen remains in control. * **KERISuite** = technical foundation for secure, self-controlled, persistent, cryptographically verifiable digital identity. * **eIDAS** = European legal framework for electronic identification and trust services. * **EUDI Wallet** = the European Digital Identity Wallet under eIDAS 2.0, enabling citizens and organizations to store and share digital credentials. ### The relation between these concepts SEDI and eIDAS/EUDI represent two policy approaches to digital identity: Some US states versus EU. KERI/KERISuite can be seen as a possible technical infrastructure for implementing such models in a privacy-preserving, decentralized, and verifiable manner. SEDI places more emphasis on individual sovereignty and state endorsement. Sheila: "... “while eIDAS/EUDI not only emphasizes EU-wide interoperability and legal recognition, but puts privacy, security, and ease of use at its core. Building trust among European residents is an important part of broader adoption.” The meetup is organized by the Permissionless Society Meetup Group and supported by the Linux Foundation Decentralized Trust (LFDT). ### Speakers * Introduction to SEDI and the KERI protocol — Henk van Cann * European Digital Identity Wallet: more features online - Sheila Ghosh Free entrance. Doors open at 6:45 PM. The meetup starts exactly at 7:00 PM. At 8:30 PM we'll have a drink and a chat. ***Also announced here:*** [https://www.meetup.com/permissionless-society/events/314848909/](https://www.meetup.com/permissionless-society/events/314848909/) **Bio Sheila Ghosh** Sheila Ghosh has been working on digital identity and government digitization for more than 25 years. She started as an architect for the Dutch government in 2000 and was involved in the first versions of DigiD and MijnOverheid. Since then, she has helped many government organizations with digital identity projects and digital transformation. In this Meetup, Sheila will share her perspective on the European Digital Identity (EDI) Wallet, explain its core concepts, and discuss the standards that underpin it. **Bio Henk van Cann** 1. MSc Management and Computer Science (1992) and BSc Water and Soil Management (1987) 2. Co-founder ‘Permission-less Society’ Meetups (2016-**today**) 3. Trainer of teachers at Blockchain Workspace (2016-2020) 4. KERI Suite documentation and education (2021-**today**) 5. Co-chair Concepts & terminology of Lunix Foundation Decentralized Trust /Trust over IP foundation (2023-2025) 6. Founding chairman of KERI Foundation LLC (2024-**today**) 7. Organizer of the KERICONF26 in Utah, US (2025-**today**)

Monthly working lunch for Columbus business owners. One specific topic, one to three actions you can run this week. You can be the best at what you do and still be invisible. If local buyers cannot find you, the phone does not ring. Marketing Monday Lunch + Learn is a monthly working lunch for Columbus business owners focused on building relationships, local networking, and local marketing. Every kind of local business welcome. No pitch round, no pressure, no upsell. **This month** Most local businesses pick one or two places to be visible and call it good. The result is inconsistent calls and a feeling that marketing is not working. We will walk through the three places every local business needs to show up, plus the fourth place most owners ignore that quietly produces the warmest leads. **What to expect** Doors open at noon. Order lunch and drinks at the cafe counter or bring your own. You get real conversation with other local owners and a focused marketing lesson. You leave knowing people and with one to three actions to run that week. The room is reserved through 1:30 PM. **Who this is for** Any local business owner who wants clearer marketing direction and real local relationships. Service businesses, retail, home services, professional services, online owners building local presence, anyone serious about being part of the Columbus business community. **Not the right fit if** You are here to pitch the room or recruit for an MLM. **Details** * Second Monday of every month * 12:00 to 1:30 PM * Good Cafe Easton, 4400 Easton Commons, Ste 150, Columbus, OH 43219 * Order lunch and drinks at the counter when you arrive * Free to attend, RSVP required, space is limited **About the host** Rita Suzanne is a local marketing strategist and the founder of Local Marketing Method. She runs Visibility is Profitability, the membership where local business owners build the system that keeps their phone ringing. Learn more at learnlocalmarketing.com. Register here: [https://www.eventbrite.com/e/1989964540509?aff=oddtdtcreator](https://www.eventbrite.com/e/1989964540509?aff=oddtdtcreator)

(Note: RSVPing here on meetup does NOT reserve your seat. To do that, you’ll need to register at our website, [HERE](https://www.coreerocks.com/Events.aspx?ID=Picnic-with-a-Purpose-Real-Estate-Networking-That-Actually-Pays-Off-14-7-7-2026).) Real estate is a proven wealth-builder—it has been for generations. But it’s not a solo sport. You need PEOPLE—who can advise you, partner with you, bring you deals, and buy deals from you. We’re all about bringing you the best, most active, most got-your-back people in Central Ohio, which is why our July meeting is all about real conversations with real investors at our annual Picnic with a Purpose. This is where: * Deals get discussed * Partnerships get formed * Funding relationships start * Problems get solved faster Bring your family. Build your network. Strengthen the relationships that actually move your business forward. Members and first-time guests are free. Returning guests are $35. Location is a local park and will be shared after registration. Space is limited, so you’ll want to secure your spot now. Remember, to actually reserve your seat, you have to go [HERE](https://www.coreerocks.com/Events.aspx?ID=Picnic-with-a-Purpose-Real-Estate-Networking-That-Actually-Pays-Off-14-7-7-2026) and register on our website!

CONNECTED – Grove City A casual, people-first networking gathering. CONNECTED – Grove City is a casual, people-first networking gathering. Join us for a relaxed, low-pressure space to meet new people, build real relationships, and have meaningful conversations — no sales pitches required. From 7:30–8:30 AM every 3rd Wednesday of the month at the Grove City Business Center. Coffee & baked goods available for purchase at Pick ’Em Up Joe's. Free street & public lot parking behind the building. Free to attend & open to all!

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

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

**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 Chris Pazsint will be talking about Agentic Coding. How does one use CLI Based Agents, and Agentic IDEs such as Cursor, Kiro, Antigravity? How to include agentic coding plugins for IDEs you already love such as Visual Studio Code. 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

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