🇳🇱 Tech Events in Netherlands

G&A - Demos, Pitches & Drinks #118
📍 LIOC Roof Terrace, Strijp-T (Eindhoven)
📅 May 6, 2026

We’re taking it outside. Rooftop edition at Strijp-T!🌞

On May 6, we gather on the rooftop of Strijp-T for an evening of short demos, sharp thinking, and open Q&A.

Short, focused pitches, followed by questions that get to the core.

Hosted by Bert-Jan Woertman and Thom van de Wiel, who will challenge ideas where needed and keep the conversation moving.

Expect:
– Startup & scale-up news: funding, breakthroughs, and what’s happening now
– Upcoming events in the tech ecosystem
– Focused pitches & demos
– Open mic
– Direct, no-nonsense Q&A
– Drinks as the evening unfolds 🥂

For those who build, and prefer a good question over a long explanation.
Join us.

Pitch applications are now closed — we’re fully booked. Take the Open Mic or join next edition, secure your spot via: 📧 info@gerardanton.com

Team DPD

Hello AI & Data Science enthusiasts! 👋

We’re excited to invite you to the 27th edition of the DS Rotterdam Meetup!

Join us for an evening of good conversations—this meetup is designed for Data Scientists, ML Engineers, Technical Founders, and Product Leads who want to move beyond proof-of-concept and understand the strategic side of their stack, and (of course) pizza 🍕.

📍 Where: 42workspace, Rotterdam
📝 Please RSVP below — seats are limited

Sponsored by CINAQ
CINAQ is dedicated to making application deployment and operations universally accessible. We are committed to empowering individuals by providing the essential tools needed to turn innovative ideas into reality.

Hosted by 42workspace
The venue for this event is generously provided by 42workspace. We’d like to thank them for actively for providing their space and supporting the Data Science and AI community in Rotterdam!

42workspace is Rotterdam’s leading coworking space and community for innovative tech startups, scale-ups, and freelancers. Located in the heart of the city, it offers a vibrant environment where technology, entrepreneurship, and community come together.

Program

17:30 – 18:30 — Doors open & sign-in
18:30 – 19:15 — Food & drinks
19:15 – 19:45 — First speaker and Q&A
19:45 – 19:55 — Short talk by the host (42workspace)
19:55 – 20:00 — Short break
20:00 – 20:30 — Second speaker and Q&A
20:30: end

🎤 Talk 1: Build local, deploy in private
Speaker: Steven Cheng

Bio
Steven is a technical founder of CINAQ. He holds a master's degree in computer science degree and has worked for major companies like ASML, Mendix, Dutch Defense, Samsung, Siemens and many more.

Abstract
Some say Gen-AI is a bubble. As a tech enthusiast I don't really care about the financial aspect of it. However I'm intrigued by what you can use this technology for. In this talk you will learn the basics of vibe coding a web app with Claude AI, what risks you must consider and how to securely deploy your app so that colleagues can use it.

🎤 Talk 2: Data First, AI Second:
Making the Circular Economy Work

Speaker: Tim Lee

Bio
Tim Lee is Co-Founder and CEO of Utilitarian, a circular economy technology platform powering retail take-back programmes in Europe and Australia.

Abstract
Circular economy generates a lot of data, but most of it is unstructured, unverified, or never captured. This talk covers the emerging role of data in closing material loops, and where AI is genuinely useful versus oversold.

We look forward to seeing you there!

If you have colleagues or friends interested in data science, AI, or analytics — feel free to invite them along 🚀

Photography & Media Consent
By registering for this event, you acknowledge and agree that photographs and/or video may be taken during the event. These may include images in which you appear and may be used for promotional, marketing, or documentation purposes by the event organizers, including publication on websites, social media, and other communication channels. If you do not wish to be photographed or recorded, please inform the event staff upon arrival.

Digital technologies have a growing environmental and social impact, one that will continue to increase as systems scale and evolve. This shift challenges the role of designers, who can no longer focus solely on user needs but must consider the broader ecosystem in which technology operates. As AI accelerates these dynamics, its influence is shaped not only by technology itself, but by the design choices behind it. This talk explores how design operates across multiple layers, opening a perspective on more responsible approaches to innovation.

SPEAKER
Anna Forlati is Head of Digital Sustainability and Impact at TeamSystem. With a background in UX and Business Design, she bridges technology, sustainability, and humanity-centred innovation.
Her work focuses on integrating ESG principles and digital sustainability strategies into products and processes, designing technology that creates positive impact for people, businesses, and the planet.

HOST
forpeople is a global creative studio partnering with visionary companies to shape the future human experience. By joining the dots of strategy, brand, and experience design, we are redefining how people eat, move, live, work, and grow together. Based in London and Amsterdam, their diverse team of 130+ creatives puts people at the heart of everything they do. Fiercely independent. Proudly certified B Corp™. Striving to create a fairer, more inclusive, more meaningful world for people.

PROGRAM

18:00 Doors open with drinks & bites
18:30 Talk + Q&A
19:30 Drinks & Pizza🍕 & Networking

📸 Please keep in mind that there will be pictures taken at the event. They will be uploaded to the meetup page and might be used on social media.

** Important RSVP here (Due to room capacity and venue security, it's required to pre-register at the link for admission).

Description:
Join us for a community-led developer event focused on AI-assisted coding with GitHub Copilot.
This meetup brings developers together to explore practical workflows, real-world use cases, and hands-on experiences using GitHub Copilot. Whether you are new to GitHub Copilot or already using it in your daily work, this event will help you better understand how to apply AI-assisted coding techniques across the software development lifecycle. Expect practical demos, lessons from the field, and conversations with other engineers experimenting with AI-powered development. This event is organized in collaboration with Dutch Cloud Native & AI Community, AI Camp, Java Users Group and Amsterdam.dev communities.

Program
Time Session
17:00–18:00 Walk-in
18:00–18:05 Welcome
18:05–18:50 Talk 1: Agentic SDLC with GitHub Copilot — Burak Unuvar
18:50–19:30 Pizza
19:30–20:15 Talk 2: GitHub Copilot as an Incident Triage Teammate — Farid Nouri Neshat
20:15–20:45 Talk 3: Presentation TBA — Radek / Radosław Kowalski
20:45–21:00 Networking & drinks
21:00 End

Speaker: Burak Unuvar
This session explores how GitHub Copilot enables an agentic software development lifecycle, where software delivery tasks can be executed end to end, from issue assignment to pull request creation.
The talk will include a live demonstration of Copilot in action across multiple surfaces, including the IDE, UI, and CLI, while highlighting multi-model and multi-agent capabilities from providers such as Anthropic and OpenAI.
About Burak
Burak draws boxes and lines and says the word “Kubernetes” a lot. Recently, he has been prompting heavily while letting GitHub Copilot do the magic.
Website: https://www.dailydoseofghcp.com/

Speaker: Farid Nouri Neshat
We would all appreciate having a fast teammate who can help troubleshoot incidents and find the needle in the haystack.
This talk will demonstrate how to build your own automated agent with GitHub Copilot. The agent can be triggered by alerts, safely gather vital context from observability tools, cloud APIs, and runbooks, and then provide actionable next steps directly to your team.
About Farid
Farid is a freelance cloud engineer with around 15 years of combined experience. He started his journey in full-stack development with Node.js and gradually shifted toward backend engineering and AWS infrastructure.
Website: https://faridnsh.ninja/

Speaker: Radek Radosław Kowalski
Ten months ago, when Radek and his team launched their project under a tight deadline and limited budget, it seemed nearly impossible. Fortunately, it was 2025—and agentic coding tools were ready to help.
The team embraced these tools as a lifeline, developing a workflow where engineers and AI agents built software side by side. The result: delivery ahead of schedule and within budget.
In this talk, Radek shares how the team’s approach evolved, the practical strategies they developed, and the lessons they learned to overcome constraints in time and cost.
About Radek
Over a 20+ year career in IT, Radek has grown from software engineer to architect to senior leader—before returning to the trenches to embrace the AI revolution and shape it firsthand. In the past year, he has helped organizations and engineering teams embed AI into both their business and daily workflows.
LinkedIn: https://www.linkedin.com/in/radek-kowalski/

Photos and videos may be taken during the event and used for social media and promotional materials. By attending the meetup, you consent to being photographed or recorded.

All attendees are required to follow the Berlin Code of Conduct.

For questions, please reach out on the CNCF #netherlands slack channel.
We are also looking for co-organizers, especially in other cities. Please also join the official CNCF community.

Hey folks,
Join us on May 6 for a React meetup where we’ll explore how modern web engineering is evolving — starting with a fresh look at how we deploy Next.js applications beyond traditional setups, and what new tooling makes possible today.

🗣 Call for Proposals
Have an idea or story to share? Submit your talk proposal through our CFP form and take the stage at one of our upcoming meetups!

🤝 Organized by
This event made possible thanks to the support from React Summit, JSNation and TechLead Conf organizers – GitNation.

🤝 Sponsored by
Huge thanks to our friends Sentry!
Sentry is the only app monitoring platform built for developers that gets to the root cause for every issue. For software teams, Sentry is essential for monitoring application code quality. From Error tracking to Performance monitoring, developers can see clearer & solve quicker — from frontend to backend.

🤝 Want to support our community?
We’re looking for venue partners and sponsors for future meetups. Let’s discuss collaboration — contact us!

🕑 Event Schedule
18:30 - Doors open - snacks, beer, socialization
19:00 - Intro and announcements
19:10 - Vinext: Deploy Next.js Without Next.js - Jan Peer
19.35 - Modernizing a Codebase While Delivering Features - Bora Semiz
20:00 - Break with drinks
20:15 - Don't .gitignore Mental Health - Frédéric Harper
20:40 - Networking, Open Mic Lightning Talks
Mingle until 21:30pm

🗣️ Talks

➡️ Vinext: Deploy Next.js Without Next.js - Jan Peer
Next.js is a great framework - until you want to deploy it somewhere that isn't Vercel. vinext is a Vite plugin from Cloudflare that reimplements the Next.js API surface from scratch, so your existing app runs everywhere with a single command. In this talk, we'll look at why this exists, how Cloudflare built it in a week using AI, and how close to "drop-in replacement" it actually gets.

➡️ Modernizing a Codebase While Delivering Features - Bora Semiz
An opinion and methodologies on how to modernize an outdated and unmaintained codebase while at the same time delivering features. We will also explore how AI can support modernizing a legacy codebase.

➡️ Don't .gitignore Mental Health - Frédéric Harper
⚠️ Content Warning ⚠️
Depression, dark thoughts, anxiety – These are some of the words that most of us would like to add to our ignore file. Discussing mental health is still taboo in our society, and it’s even more so in the developer ecosystem, where we pride ourselves on working long hours and our lack of sleep.
More than ever, we need to talk about mental health! This is why I want to share my experience with depression, general anxiety, ADHD, and experience volunteering at a suicide prevention hotline. Along with my thoughts on how we can improve the situation, I’ll be sharing some tips to help people be more open about these topics and issues – more importantly, I want to touch on how those struggling can ask for help and assistance when needed.
—
👍 Code of Conduct
By registering for this event you agree to comply with our CoC
📩 Contact
events@gitnation.org
https://twitter.com/ReactSummit
https://bsky.app/profile/reactsummit.gitnation.org
http://youtube.com/ReactConferences

Are you curious about how to make a WordPress plugin in 45 minutes with the help of AI? Then this vibe-coding workshop led by Monique Dubbelman is exactly what you’re looking for. During this session, you will get introduced to Claude Code and discover how to use this powerful tool to effortlessly turn your ideas into working code. Whether you’re a beginner or already have some experience, this workshop will help you approach coding with a fresh perspective and renewed energy. You’ll not only learn the technical aspects, but also the mindset behind vibe-coding: working intuitively, trusting your creativity, and collaborating with AI. Upfront you'll get instructions how to set up your computer to work with Claude.

Every 2 months, we'll visit a company or institute that will host the event and provide talks.

This time, we’re visiting Blender. Blender is a public project hosted on blender.org with the mission to get the world’s best 3D CG technology in the hands of artists as free/open source software. Blender is licensed as GNU GPL, owned by its contributors.

Countless communities and thriving businesses are built around Blender, from entertainment to medical research. Together, content creators, add-on developers, researchers and global marketplaces form an ever-expanding ecosystem.

If you want to learn more, check out:

• Website https://www.blender.org/
• Blog https://code.blender.org/
• Recordings of presentations from past Blender conferences, such as BCON25 https://video.blender.org/w/p/ofNr3T19QdraJNTVTB7FvG Also available on YouTube.

The schedule is as follows:

• 16:30 Walk-in, drinks, office tours
• 17:00 Seating
• 17:05 Welcome talk from the host: Blender
• 17:10 - 17:40 Talk #1: from Jeroen Bakker - "From main loop to pixels on the screen"
• 17:45 - 18:10 Networking and drinks, office tours
• 18:10 - 18:40 Talk #2: from Sybren Stuvel - "Introduction to Blender's render farm Flamenco”
• 18:40 - 19:30 Networking, drinks, and food

For those who visited the previous meetups, you already know what to expect: deep dives into technical subjects, snacks and drinks, and enough time to socialize.

You don’t need to register in advance for the office tours, they will be organised on the spot in small groups.

Due to the small size of the office the registrations are limited to 35 people only, so please register in advance to secure your spot.
And a friendly request - please no more than 5 people from the same company. Thank you!

See you there!

Join us for the next Azure Thursdays meetup.
On May 7th we are welcomed by Sopra Steria at their Headquarters in Nieuwegein.

Confirmed speakers:

• Wesley Camargo (Tata Consultancy Services)
• Jacco Rademaker (4Dotnet)

Program:
17:30 ~ 18:00 Walk-in
18:00 ~ 18:45 Dinner
18:45 ~ 19:30 First session by Wesley - Your Azure Is Wrong And I Can Prove It
19:45 ~ 20:30 Second session by Jacco - The long running battle between Azure DevOps and GitHub: finally peace?
20:30 ~ 21:00 Drinks & wrap-up

Session 1:
Speaker: Wesley Camargo
Title: Your Azure Is Wrong And I Can Prove It

Many Azure environments are functioning, but that doesn’t mean they are designed to scale, stay secure, or meet enterprise requirements. Short-term decisions like using Resource Groups as environments, relying on a single subscription, manual scaling, and adding governance only when problems appear often lead to fragile platforms that break under growth.

In this session, we uncover the most common Azure architectural anti-patterns and explain how the Microsoft Cloud Adoption Framework (CAF) provides a practical path from “it works” to Enterprise Ready. The focus is on the Ready, Govern, and Manage phases, where platform foundations are defined and long-term success is determined.
You’ll get a clear overview of key CAF design areas, based on real production environments, not theory:
• Identity and access
• Networking
• Governance and security
• Monitoring
• Automation
• Cost management

Session 2:
Speaker: Jacco Rademaker
Title: The long running battle between Azure DevOps and GitHub: finally peace?

Are you currently working with Azure DevOps, but also have an eye on GitHub for its AI features? Do you need the functionalities Azure Boards offers and would you also like to use with AI agents? Or has your organization heavily invested in Azure Pipelines, which you do not want to rebuild using GitHub Actions? And when you would move your repositories, will you still have your pull request history?

You do not have to go all-in with GitHub and leave Azure DevOps behind. Why choose, when you can combine them!

You'll learn how to connect Azure DevOps to GitHub, what features this will open up for you and what your workflow can look like.

This session will help you decide on how to move forward with your team or your whole organization!

About Azure Thursday and this event:
===> Read more about the sessions and speakers on: www.azurethursday.com
# ==========CODE=OF=CONDUCT==========
If you join this event, you agree with our Code of Conduct. Please read the full COC at https://www.azurethursday.com/code-of-conduct/

We are thrilled to welcome you to our 10th edition of the AI Native Netherlands, hosted at the Adyen headquarters in Amsterdam!

This is a joint meetup between Adyen Developer Events and Meetups and AI Native Netherlands meetup.

At the end of the evening, we're adding another Q&A panel. After the talks, you can submit questions online about what was just presented. The speakers will answer them live.

A massive thank you to our host, Adyen, for their generosity in providing the venue, food, and drinks for this evening and for supporting the Dutch AI engineering community.

We’ll cover:

• Multi-layer evaluators and human-in-the-loop safeguards for production LLM systems
• Failure modes and silent quality degradation in agentic pipelines
• Quality engineering and monitoring for production LLM systems
• Building and deploying foundational models at trillion-token scale
• Training infrastructure, pre-training at trillion-token scale, and meeting strict production SLAs
• A structured panel discussion where your questions about the talks drive the technical deep dive

Speaker 1: Ronny Roeller (NEXT AI)
Ronny is CTO and Co-Founder of NEXT AI — a customer insights platform for the AI era. Launched in April 2023, clients include Deel, Bosch, Generali, Rituals, Action, and others. He studied Computer Science at VU Amsterdam and works on building scalable, production-ready AI systems.

Talk: From Prompts to Production: Engineering Quality in LLM-Based Systems
Building systems around large language models is fundamentally different from traditional software. Outputs are probabilistic, data-dependent, and costly to compute. Deterministic QA approaches quickly break down.

In this talk, Ronny will share how production-grade quality was engineered for LLM workflows using multi-layer evaluators, real customer datasets, and human-in-the-loop safeguards. He will walk through concrete failure modes encountered in production, how silent quality degradation emerged over time, and the architectural patterns that restored reliability.

The focus is on practical techniques to measure, monitor, and continuously improve LLM system quality beyond prompt tuning.

Speaker 2: Hanna van der Vlis (Adyen)
Hanna van der Vlis is an AI research engineer at Adyen, a payment processor that handles over 40B transactions annually. She focuses on deep learning research, training infrastructure, and building foundational models. She is passionate about solving large-scale engineering challenges, deploying AI to optimize complex systems and driving real-world impact.

Talk: Towards The Adyen Foundational Model
Traditional machine learning in the payments industry relies heavily on point-in-time information silos and Boosted Trees. This approach is increasingly constrained by manual feature engineering and limited label availability.

In this talk, Hanna will outline Adyen’s transition toward a unified Foundational Model by rethinking payment sequences as a language problem. She will walk through the engineering challenges of pre-training a shared backbone on up to 51.2 trillion tokens, overcoming compute bottlenecks, and fine-tuning for downstream tasks such as fraud detection and authentication.

The focus is on the practical realities of developing and deploying these large-scale models while meeting strict sub-30ms SLAs in production.

Agenda:
17:45 — Arrival, food & drinks
18:30 — Talk #1 | Ronny Roeller
19:15 — Talk #2 | Hanna van der Vlis
20:00 — Panel discussion: Open conversation & audience Q&A
20:30 — Networking & more drinks
20:45 — Wrapping up

What to bring: Just curiosity and questions. If you are working on LLM workflows, foundational models, training infrastructure, or sub-30ms production SLAs, we would love to hear your technical questions during the panel discussion.

Who is this for: Platform engineers, AI/ML engineers, SREs, architects, and engineering leaders focused on building and validating reliable AI systems in production.

Where to find us: Adyen, Simon Carmiggeltstraat 6-50, Amsterdam
(meet at the reception; you will be brought to the 11th floor of the office building where the event will take place).

El Niño is hosting its first ever AI Meetup. In this gathering, data scientists and AI specialists of various domains will be giving talks on their latest data-driven projects and some background information on the trends of AI.

Expect three different in depth technical talks, no workshops / tips on how to use the latest AI tools, but more in depth discussions and knowledge sharing of the possibilities of AI.

After all the talk, you'll have the opportunity to mingle with the rest during the afterparty. Dinner and drinks are on us!

If you are a professional, a student or a mere enthusiast of the industry within the area of AI, this is the perfect evening for you! Hurry up to sign up, though, we have limited spots!

The following speakers will be giving a presentation this evening:
- Terhi Lehtola (Vaisala): Smart Sensors, Smarter People: Combining Physics, AI, and Community.
- Anand Chowdhary (Sycamore): From Prompt Engineering to Production Systems Subtitle: What actually worked at FirstQuadrant.
- Mauk Muller (El Niño): Vending Machines, Horses, and Nukes: How (Not) to Benchmark an LLM.

This (and all of our meetups) are in English (including the talks)!

Schedule

- 18:00 - Walk-in
- 18:15 - Opening and dinner
- 19:00 - Talks
- 21:00 - Networking and drinks
- 22:00 - End

Join us on May 7th at DevPulse Zwolle! DevPulse Zwolle unites developers and entrepreneurs in the regional tech scene, fostering collaboration, knowledge sharing, and insights from experts driving the future of technology!

We're preparing a tasty and wholesome meal that you're sure to appreciate! 🍱

Ps. We don't like wasting food, so please do not unsubscribe 3 days prior to the meet-up or be a no-show.

🗓 Programma

• 18:00 ⏰ Doors open
• 18:15 👋 Welkom & Dinner!
• 19:00 Mark Brinkman - The Road to Sovereignty - How to build a European Cloud Platform
• 20:00 Robert Slootjes - Building a scalable ticketing platform
• 21:00 🍺 Drinks & Socialising!

🚗 Parking
You can park at the De Makersfabriek parking lot; enter the old Philips terrain via the McDonald’s. The meetup is in building ZF (Het Ketelhuis). Or use the following link:
Google Maps

Robert Slootjes - Building a scalable ticketing platform
Learn how we built a serverless, fault-tolerant, event-driven ticketing platform on AWS. We will cover the reasons behind the decision of building this platform from scratch ourselves, the architecture of the different components, the concepts of event logging and how we deal with security & privacy. The platform launched halfway 2024 and has already been battle tested by handling over a million tickets for the biggest music festivals of the Netherlands including Zwarte Cross, Defqon.1 and Awakenings.

Mark Brinkman - The Road to Sovereignty - How to build a European Cloud Platform
TBA.

✨ Sponsors
DevPulse Zwolle is hosted by CloudProud and powered by ZWINC & DDZ. ZWINC helps entrepreneurs grow their start-up from idea to business.

Join us for drinks and chats at Café de Muurbloem.

We have a Slack for the Hackers & Founders community. If you want to join the Hackers & Founders conversations in Slack (#jobs etc) please DM on Twitter (https://twitter.com/feargal) and I will send you a sign up link and follow on Twitter for irregular updates on the meetup.

Details

Welkom bij de Zwolse WordPress Meetup. Een informele bijeenkomst om mede-WordPressers te ontmoeten en kennis te delen.

➡️ Programma ️
18:45-19:00 Inloop
19:00-19:15 ️ Opening
19:15-20:00 ️ Presentatie Accessibility door Annelies Verhelst (theoriedeel)
20:00-20:50 Workshop Basis van webtoegankelijkheid (praktijkdeel)
20:50-20:55 Afsluiting

➡️ Presentatie Accessibility, onder andere wetgeving en tooling, door Annelies Verhelst

Een website toegankelijk maken voor iedereen, inclusief mensen met een beperking, dat wil iedereen wel. Maar waar begin je, waar doe je goed aan, over wat voor beperkingen hebben we het nou eigenlijk? En hoe ga je aan de slag?

Tijdens deze sessie leer je in sneltreinvaart de basics van digitale toegankelijkheid en ga je daarna zelf aan de slag.

Je gaat naar huis met in elk geval de belangrijkste checks onder de knie, en voldoende informatie om daarna verder te gaan met het stap voor stap toegankelijker maken van jouw websites.

➡️ ️ Workshop Leer de basis van webtoegankelijkheid

Neem je laptop mee, en installeer van te voren onderstaande software en extensies. We gebruiken Google Chrome om te testen, maar de meeste extensies zijn er ook voor andere browsers.

• https://toegankelink.nl/schermlezer
• https://toegankelink.nl/contrast
• https://toegankelink.nl/headings
• https://toegankelink.nl/wave
• https://toegankelink.nl/landmarks
• htttps://chromewebstore.google.com/detail/axe-devtools-web-accessib/lhdoppojpmngadmnindnejefpokejbdd

➡️ Praktisch

• We zitten in het MAAKpunt van Stadkamer Centrum, geopend van 18:45 tot 20:55.
• Stadkamer Centrum is geopend van 09:00 tot 21:00. Consumpties zijn niet inbegrepen; deze kun je eventueel zelf halen bij de horeca.
• Na afloop doen we vaak nog een drankje in de binnenstad (op loopafstand), voor wie wil.

➡️ Locatie & vervoer

• Adres Stadkamer Centrum: Zeven Alleetjes 1a, 8011 CV Zwolle, zaal MAAKpunt.
• Met de auto kun je (betaald) parkeren op het naastgelegen parkeerterrein. Houd rekening met extra drukte door de koopavond op donderdag.
• Vanaf Station Zwolle is het circa 5 minuten lopen.

Hi tech enthusiasts,
TecTalk is back! The last two times were unfortunately cancelled because of personal reasons by the presenters. But now we’re back with a topic that’s been around for many years, and in these times of anti-big tech sentiment and the need to become more independent, it’s important as ever. We’re going to talk about Open Source.
Maarten ter Huurne, software engineer, long-time open source contributor, and one of the organizers of the T-DOSE annual open source conference, will highlight many different aspects of open source in a presentation and discussion format.

Much of the digital world runs on open source software, but often behind the scenes. What is open source really, what makes it work, and why is it increasingly important? — Maarten

The topics will range from foundational, like software licensing and digital rights, to practical, such as examples of useful open source projects, how to get them, and how you can contribute to open source yourself.
Come and join us! As usual, this talk will be in English when there is 1 or more non-native Dutch speakers in the audience.
And of course, the entrance is free. But please do sign up so we know how many people will come: get a free ticket
Hope to see you at Stadslab Eindhoven on May 7th, starting at 7 PM.

👋 Welcome, Hi everyone 👋

👉 Please bring your laptop 💻, You’ll be actively working on the exercises during the session. We’ll be diving into a selection of new features from PHP 8.4 and 8.5 🐘✨
..
This session will be interactive and hands-on 💻. For each feature, we’ll start with a short introduction, followed by a practical exercise where you can try it out yourself. Then we’ll move on to the next feature and repeat the process 🔁
..
The structure of the evening will be:

• 📖 Brief explanation of a feature
• 🛠️ Hands-on exercise
• 🔁 Repeat with another feature

Looking forward to seeing you there! 🎉

• ✅ Beginners & students
• ✅ Experienced developers

• 🌐 Networking with developers from different backgrounds
• 🍻 A relaxed, welcoming community vibe

During Waag Open, you’ll map out other people’s routes around Nieuwmarkt through drawing. The workshop is led by visual artist Esther Polak.

After a very successful first edition in Berlin in 2023, the babashka-conf come to the Netherlands for the second episode. As usual, we will explore the babashka ecosystem, use cases and techniques while making sure our community gets the chance to shake hands and exchange ideas.

More info on the website: https://babashka.org/conf/

NOTE: while the event is completely free of charge, seating is limited so reserve your ticket while you can! In case there are no seats left or in case of other questions: send an e-mail to babashka.conf@gmail.com and we will see what we can do.

Welcome all trailblazers in the Coffee Lab 's-Hertogenbosch.

Do you live around Den Bosch, and looking to meet other trailblazers? Join our meetup event! As always we aim to study Salesforce, but also to get to know each other a bit better and to share our knowledge with each other.
Everyone is welcome, please join us and bring those who might be interested!
Please don't forget to bring your laptop

Join us for an exciting session of Google Cloud Next Extended, where we'll delve into the newest innovations in AI, Cloud Run, Firebase, and Flutter. Discover how AI is transforming industries, explore the flexibility of Cloud Run, learn best practices for Firebase, and see the latest in Flutter development. Network with fellow developers, share insights, and enhance your skills. Don't miss out on the chance to be at the forefront of technology and innovation. Spaces are limited. RSVP now to secure your spot!

Agenda

Hosted By

Jairzinno Henriquez, GDG Organizer

Alfredo Bautista Santos, Flutter developer

Complete your event RSVP here: https://gdg.community.dev/events/details/google-gdg-netherlands-presents-google-cloud-next-extended-unlocking-the-future/.

On the 9th of May, we're joining forces with the Creative Coding Amsterdam for a full afternoon and evening at A Lab.

One big room. Two communities.

Games, art, code, and the people who make them.
We’ll be filling the space with exhibition and play-test booths. Indie games in the making you can play, creative projects to interact with, and the makers right there to talk to.
It's going to be informal and a bit chaotic in the best possible way.
Come for the work, stay for the people.

Towards the evening we'll gather for a round of short talks and showcases from both communities before we wind things down.

We've got a great mix of people signed up already!
Want to join them and show your work?
There's still space! → forms.cca.codes/may

All are welcome.
Free to attend.

Hope to see you there! 💜

→ more on https://cca.codes/assembly

In 2026, the European Parliament will vote on the introduction of the digital euro. During this event, we will take a closer look at the conditions needed to transform our financial system, and how the digital euro can play a role in this.

Ben je benieuwd hoe je kunt bepalen of een app betrouwbaar is? Tijdens dit event introduceren we AppInspector en laten we op een toegankelijke manier zien hoe je zelf bewuster kunt omgaan met apps.
AppInspector is een open-source platform dat apps downloadt, onderzoekt en controleert op onder andere privacy, financiële aspecten en werking op je telefoon. Ook kijken we naar de betrouwbaarheid van de maker van de app. De resultaten zijn gratis en zonder registratie beschikbaar via www.appinspector.nl.
Dit event is geschikt voor iedereen — technische kennis is niet nodig.
Programma

• 13:00 – 14:00: Inloop
• 14:00 – 14:30: Introductie & presentatie AppInspector
• 14:30 – 15:00: Workshop & discussie (bewust omgaan met apps)
• 15:00 – 16:00: Borrel & napraten

Meld je aan om je plek te reserveren. We kijken ernaar uit je te zien!

Kom naar het HaHaHo Makers Lab Utrecht voor een avond vol kennis & ervaringsdelen en maken, met de focus op elektronica met microprocessoren zoals Arduino & Raspberry Pi, LED’s en meetapparatuur.

19:00 Inloop + opzetten apparatuur
19:45 Standup: wat wil iedereen doen en/of leren deze avond?
20:00 Parallelle activiteiten:
– startactiviteiten voor nieuwe deelnemers (Arduino, soldering, meetapparatuur, etc.)
– onderlinge kennisuitwisseling adhv de wensen uit de standup
– werken aan het gezamenlijke PraatPaal-project
– werken aan je eigen project
– ordenen/markeren van de ladenkasten met elektronisch componenten
21:30 Start met opruimen
21:45 Einde en verlaten van de Bibliotheek

Wij zijn meestal met een groep van een kleine tien (er is ook nog een whatsapp aanmeldingslijst). Een laptop is niet noodzakelijk maar komt vaak van pas! We vragen een vrijwillige donatie van €5,55 per avond om de inventaris met apparatuur en elektronische componenten op peil te kunnen houden.

English
19:00 Room available for setting up equipment
19:45 Standup: what are the participant’s plans and wishes for the evening?
20:00 Parallel activities:
– starter activities for new participants (Arduino, soldering, measuring equipment, etc.)
– sharing knowledge as follow-up on the plans and wishes expressed during the standup
– working on the community Interactive Pole project
– working on your individual project
– sorting the chest of drawers with electrical components
21:30 Start decluttering the room
21:45 End: leave the Public Library

Most evenings see a group of about 10 people (there is an additional whatsapp list). Bring your laptop if you want to program microcontrollers! We ask for a voluntary donation of €5,55 per evening to maintain the inventory with equipment and electrical components.

Full-stack meetup in Utrecht, Netherlands

We’ve been getting a lot of requests to explore two big questions. First, what coding skills will matter in an AI-driven world? This topic has only become more pressing as some have made bold claims that traditional coding is "dead." And second, what will the product stack of the future even look like in an AI-driven world? So we'll be covering both in the May AI on the Amstel meetup!

Here is the panel for the May meetup:

• Adrian McPhee, CTO of the startup Eccasion. Adrian is also the former CTO of Bol.com and the former CTO of Amsterdam fintech champion Backbase.
• Clare Jones, CEO of Polarsteps. Amsterdam-based Polarsteps is a popular travel app with over 20 million users.
• Michael Aronzon, CTO of Miro. Miro's visual workspace has over 100 million users across 250,000 organizations.

May meetup will be held at the large atrium in Miro's Amsterdam office. Doors open at 17:00. The event starts with a networking period, and we usually start the panel sometime between 17:45-18:00. There will be time for Q&A with the audience. After the panel concludes, there will be another networking session. It's fine if you arrive a little late - we know work can be busy!

For those that are new to this meetup, the AI on the Amstel meetup is a monthly technical meetup that features knowledgeable speakers discussing "in the weeds" AI topics and challenges. This meetup caters to engineers, product managers, and founders in AI.

The AI on the Amstel meetup is the largest monthly AI event in Amsterdam. We get 250-400+ people a month depending on the size of the venue that month. For example, here are the pictures of the crowds at our three most recent meetups: a meetup at Amsterdam's flagship public library, a meetup at the AMS Institute graduate school, and a meetup at Booking's headquarters. I hope to see you at the May event!

Our hosts for this month (Miro) also have legal terms for an event in their space. Anyone attending acknowledges that they have read and agree to Miro’s Conduct and Content Standards, Miro Meetups Terms, and Miro’s Nondisclosure Agreement and agree that Miro may use their personal data to send them communications, including marketing emails in accordance with Miro's Privacy Policy.

We are excited to announce our next Utrecht JUG meetup, on May 12th hosted by JDriven. It will be an evening packed with practical insights and real-world lessons from modern software development. Join us for a great mix of knowledge sharing, engaging talks, and of course food, drinks, and good conversations.

We kick off the evening with food and drinks before diving into our first session, where Susanne Pieterse explores how Retrieval-Augmented Generation (RAG) can be applied in large-scale, real-world environments. Moving beyond demos, she’ll share hands-on experiences from modernizing legacy systems, covering challenges like document processing, access control, and keeping AI grounded in reliable data.

After the break, Jos Roseboom takes the stage with a deep dive into performance pitfalls in JPA and related technologies. With practical examples and a touch of humor, this session uncovers how ORM abstractions can sometimes lead to unexpected slowdowns and how to detect and fix them before they impact your users.

We’ll wrap up the evening with drinks, giving you plenty of time to connect with fellow developers, exchange ideas, and reflect on the sessions. Plus, don’t miss the chance to win a JetBrains license in our giveaway.

Join us for an evening full of learning, inspiration, and great conversations.

Please join us and RSVP!

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.

17:00 Doors open
17:45 Food & Drinks
18:30 RAG in the Wild: Real-World Lessons from Modernizing Legacy Systems by Susanne Pieterse
19:30 Break
19:45 When ORM Becomes OMG: Performance Pitfalls in JPA and Friends by Jos Roseboom
20:45 Drinks

1 JetBrains licence

Enterprise and government document systems hold terabytes of valuable unstructured information, yet most still rely on keyword and metadata search with little semantic context. Retrieval-Augmented Generation (RAG) promises a breakthrough, but tutorials rarely prepare you for regulated, large-scale environments.

In this talk, I’ll share lessons from building a RAG stack with Spring Boot, Elasticsearch, LangChain4j, Docker, and ActiveMQ, using both Azure OpenAI and Ollama. Expect concrete insights on document chunking, enforcing access control, and keeping LLMs grounded in facts — practical takeaways for anyone bringing RAG from demo to production.

JPA makes database interaction feel almost magical—until your app grinds to a halt. In this talk, we’ll take a tour through the common (and not-so-common) performance pitfalls that turn object-relational mapping into an object-relational mess. From data loading surprises to connection mismanagement, we’ll explore real-world issues using a sample app: the FunFactStore, where fun facts are sold, but bugs are free.

We’ll dig into how seemingly harmless libraries can sometimes do more harm than good, and how tooling can help you spot trouble before your users do. Whether you’re using Spring Data JPA, navigating tricky transaction boundaries, or just wondering why things suddenly got slow, this session offers practical insights—and maybe a few fun facts.

As an autodidact full-stack engineer and iSAQB-certified software architect, Susanne thrives on innovation, learning, and knowledge-sharing, with tea and a heavy-bag boxing workout fueling the journey. She helps Java developers, who are eager to explore generative AI, transform their ideas into high-value, real-world creations.

Jos gets a smile on his face when he makes other people happy by letting a computer do what they don’t like to do. He has been trying to do so professionally for the past 16 years. In his spare time, Jos likes to play tennis. He is a trainer/coach for kids playing the typical Dutch sport korfball.

Save the date: Tuesday 12th of May 2026!

We will host our fullstack event @ Sopra Steria Groningen office: Full-stack Spring Sessions!

Sign up via: https://www.eventbrite.co.uk/e/tickets-fullstack-spring-sessions-1985899204981?aff=oddtdtcreator

This event hosts a wide range of speakers and subjects, there will be food and drinks and time to meet and catch up. We'll host two keynotes, magical intermezzo's, next to our other speakers and subjects as listed below!

Timetable

The Brothers of Mystery - A magical kick-off of (hopefully) a magical evening!
17:30 - 17:45

Keynote: Ester Greenwood - Quality is a Ballet
17:45 - 18:15

Breakout 1: Frederieke Scheper & Laurens van der Kooi
Breakout 2: Rodney Wormsbecher;
18:15 - 19:00

Dinner: Happy Smokers
19:00 - 20:00

The Brothers of Mystery - A magical intermezzo - part 2!
20:15 - 20:30

Ruben Scheedler: Doctor, my agent keeps acting up;
20:30 - 21:15

Keynote: Michael Bolton;
21:15 - 22:15

Social Drinks; 22:15 - 23:00

Kind regards,

Mark Poelstra, Matthijs Koopman, Willem Keesman, Douwe Jongeneel & Erwin Reimert

Join us on Tuesday, May 12th for another engaging JUG Noord meetup in Leeuwarden, where Hinse will share how we can prevent nullpointers with JSpecify (included in the latest Spring!) and Paulien will explore how graph databases can help you model complex domains in Java.

📅 Date & Time:
Venue opens: 16:30
First talk starts: 17:00
Food & drinks: Provided between the sessions

📍 Location: ING Leeuwarden, Hazel: Reviusstraat 2, 8913 HT Leeuwarden

🚨 This is the new ING office, a 5 minute walk from the old one so keep that in mind while traveling. For those arriving by car: paid parking is available next door, or at Fonteinland or next to the WTC.🚨

🚨 Important: Signing up is mandatory for entry. If the name on your Meetup profile does not match your ID, please contact Johan (organizer) with your full name.

🇬🇧 Never a Null Moment with JSpecify by Hinse ter Schuur (SDB Java)
Since the beginning of Java we're used to dealing with NullPointerExceptions. We tried to prevent null references using project conventions and sprinkling (a lot of) annotations throughout our codebases. But even with all this tedious work we still run into "null moments", unexpected NullPointerExceptions showing up at runtime.

One of the reasons this problem has been hard to solve is that Java never had a standard well-defined way to express nullness. Different annotation libraries and tools exist, with slightly different semantics. As a result, annotations often act more as hints than as guarantees. JSpecify aims to change this. It's a collaborative effort by major Java ecosystem stakeholders to define clear, consistent nullness semantics.

With JSpecify, you can set default nullness per package via the @NullMarked annotation, making your intent explicit. Because of this precision, JSpecify offers a solid foundation to provide null-safety in your libraries and applications. You don’t need to annotate everything or rewrite existing code to get started. In this session you will learn what makes JSpecify different from other attempts. You'll also discover how you can start applying JSpecify incrementally in your own production code right away.

🇬🇧 Thinking in Relationships: Practical Graph Database Modelling in Java with Neo4J by Paulien van Alst (OpenValue)
As a Java developer, we are used to thinking about relational databases and occasionally about document stores. But when working with domain models where relationships are first-class citizens and data is highly connected, graph databases are very valuable to consider.

In this talk, we will explore how graph databases can help you model complex domains with highly connected entities more naturally. Examples of such domain models are criminal investigations, recommendation models, family trees, or HR models.

Neo4j is a graph database that integrates well in Spring boot applications. Based on my experiences with Neo4j in multiple projects, I’ll walk you through how to model a domain as a graph and introduce you to Neo4j and its query language Cypher. Also, I’ll introduce you to some common pitfalls to avoid when adopting graph databases and what consequences those pitfalls can have. Finally, I’ll show how a re-modelling of a graph saved us from stepping away from Neo4j and helped us understand our domain and its challenges even more. You will walk away with clear knowledge on how and when to start a project with graph databases.

About the speakers
Hinse is a Software Engineer at SDB Java. He has been a professional Java coder for over 20 years. He loves to share his experience by doing pair programming, reviews, writing articles and giving talks.

Paulien is a passionate software engineer in love with readable, reliable, and testable code, independent of the language or technology used. At OpenValue, she works on helping companies set up better software. Lately, she has been giving presentations and workshops about what she encounters during her day-to-day work. In her free time, she likes to sport and to cook, whenever she is not rebuilding her house and garden.

Mendix extensions are one of the most powerful ways to extend the platform. Curious how Mendix extensions are built? This meetup is a hands-on, developer-focused session where you’ll get your hands dirty.

After a short introduction, we move quickly into doing. You’ll explore the structure, tooling, and best practices behind Mendix extensions.

• How Mendix extensions work
• How to set up and structure an extension project
• Best practices for building extensions

Mendix extensions unlock a whole new level of what you can build with the platform. This meetup is designed to spark excitement around Mendix extensions and show how small, focused extensions can create big value.

17:30 – 18:30
Walk-in, drinks, snacks, informal networking
18:30 – 19:00
Short introduction and technical overview
19:00 – 20:00
Hands-on building and coding session
20:00 – 20:30
Wrap-up, discussion, sharing learnings

• Bring your own laptop
• Basic Mendix development experience recommended
• No recording will be made

📍 Location: Mendix Office
🍕 Food: Pizza provided

🎤 Peter Mudde
🎤 Jonathan Diehl
🎤 Andrej Koelewijn

This is an in-person Mendix Meetup focused on community, learning, and knowledge sharing.
No sales pitches. No recruitment. Just building together.
Mendix Community Meetups are about meeting other makers, sharing experience, and learning something new.