Brainberg

🇳🇱 Tech Events in Netherlands

The Netherlands punches above its size on tech events. Amsterdam runs one of Europe's strongest applied-AI and product scenes, and Rotterdam, Utrecht, Eindhoven, Delft, and The Hague each sustain specialized communities in design, hardware, embedded, and data. Active cities on Brainberg right now include Amsterdam, Utrecht, Rotterdam, Groningen, The Hague, 's-Hertogenbosch, Eindhoven, and Enschede. Brainberg aggregates listings from multiple event platforms and community calendars into a single European feed, so the full schedule for the country shows up in one chronological view instead of spread across separate platforms.

Cities with upcoming events

Upcoming events in Netherlands

Software EngineeringMeetupFree

Workshop 3D printen

The Hague, 🇳🇱 Netherlands

During the Introduction to 3D Printing at Makerspace Haagse Hout, you will gain insight into the process from 3D design to operating the 3D printer. You will learn about various 3D printing techniques.

• You will discover where you can find existing 3D designs.
• You will learn which programs you can use to create and adjust 3D designs yourself.
• You will learn to print yourself with one of our 3D printers.

After an explanation of various 3D printing techniques, we will create a 3D design and you will 3D print yourself. We will use the free 3D drawing program Tinkercad and CURA for 3D printers.

The costs of the workshop are Euro 35, - The minimum number of participants is 3 people. The maximum number of participants is 8 people.
After participating in the workshop, you are welcome to use our 3D printers in our makerspace during the walk-in hours (every Saturday from 11 am to 5 pm and by appointment if necessary)

++++++++++++++++++++++++++++++++++++++++++++++

Tijdens de Introductie 3D Printen bij Makerspace Haagse Hout krijg je inzicht in het proces vanaf het 3D ontwerpen tot en met het bedienen van de 3D printer. Je leert over verschillende 3D printtechnieken.

• Je ontdekt waar je al bestaande 3D ontwerpen kunt vinden.
• Je leert met welke programma's je zelf 3D ontwerpen kan maken en aanpassen.
• Je leert zelf printen met een van onze 3D printers.

Na uitleg over verschillende 3D printtechnieken, maken we een 3D ontwerp en ga je zelf 3D printen. Hierbij maken we gebruik van het gratis 3D tekenprogramma Tinkercad en CURA voor 3D printers.

De kosten van de workshop zijn Euro 35,- Het minimum aantal deelnemers is 3 personen. Het maximum aantal deelnemers is 5 personen.

Na deelname aan de workshop ben je welkom om onze 3D printers te gebruiken in onze makerspace tijdens de inloopuren (elke zaterdag van 11 - 17 uur en eventueel op afspraak)

Sat 20 Jun · 11:00< 50
Hardware, Robotics & IoTMeetupFree

MakeyMonday 2026 Elektronica & microcontr. (Arduino&ESP&RPi)

Utrecht, 🇳🇱 Netherlands

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.

Mon 22 Jun · 17:19< 50
Software EngineeringMeetupFree

Team '26 Recap: Interessante aankondigingen

Groningen, 🇳🇱 Netherlands

TEAM '26, Atlassians jaarlijkse flagship-conferentie, vond begin mei plaats in het Anaheim Convention Center in Californië en stond volledig in het teken van de toekomst van teamwork met AI. Onder het motto "Human-AI collaboration at scale" onthulde Atlassian hoe AI-agents — met Rovo voorop — niet langer losse tools zijn, maar volwaardige teamgenoten binnen één geïntegreerd platform. CEO Mike Cannon-Brookes en Chief Product & AI Officer Tamar Yehoshua presenteerden een visie waarin mens en AI naadloos samenwerken, ondersteund door indrukwekkende klantcases van onder andere Rivian, Cisco en Canal+. Met meer dan veertig procent van alle sessies gewijd aan agentic AI, concrete productlanceringen en een bruisende community-ervaring was TEAM '26 hét bewijs dat het AI-tijdperk van teamwork is aangebroken — en wij brengen de belangrijkste inzichten en hoogtepunten naar je toe tijdens ons recap-evenement.

Nu op een vernieuwde locatie nabij centrum Groningen, goed bereikbaar met openbaar vervoer, auto, en uiteraard, de fiets!

Agenda


Hosted By

Edwin Stol, Community Leader

Daniel Bakker, Community Leader


Global Partner

Atlassian (http://atlassian.com)
Millions of users globally rely on Atlassian products every day for improving software development, project management, collaboration, and code quality.

For over a decade, Atlassian customers have come together to network, share ideas, solve problems, and find new ways to use Atlassian products. Today, more than 15,000 people take part in Atlassian community events in more than 30 countries.

Complete your event RSVP here: https://ace.atlassian.com/events/details/atlassian-groningen-presents-team-26-recap-interessante-aankondigingen/.

Tue 23 Jun · 15:00< 50
Software EngineeringMeetupFree

June 2026: Performance in JPA and Moving towards the European cloud

Groningen, 🇳🇱 Netherlands

Join us on Tuesday, June 23rd for another JUG Noord meetup in Groningen, featuring practical insights into JPA performance troubleshooting and an honest look at moving applications away from the usual cloud suspects towards European providers.

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

📍 Location: Kempkensberg 12, Groningen

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

🇬🇧 When ORM Becomes OMG: Performance Pitfalls in JPA and Friends by Jos Roseboom (EasingYou)

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.

🇬🇧 Moving Towards the European Cloud by Bouke Nijhuis (CINQ ICT)
The European cloud is often talked about, but how does it actually work in practice? Is it as good as the US cloud? In this session, I will share my hands-on journey migrating an Azure Function to several European cloud providers.

With some live demos, I will walk you step-by-step through the migration process, highlight common pitfalls, and share the lessons I learned along the way. You’ll see the good, the bad, and the unexpected, all from real-world experience.

By the end of the session, you will have a clearer picture of the European cloud landscape and you can start moving your own projects to European providers.

About the speakers
Jos Roseboom 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.
Bouke Nijhuis is the CTO at CINQ ICT. He likes to learn new things and he loves to live code on the stage. Furthermore he is an international speaker and a committer of open source projects. You can reach him on Bluesky at @boukenijhuis.bsky.social.

Tue 23 Jun · 15:00< 50
Software EngineeringMeetupFree

BrabantJUG @ HighTech Innovators

's-Hertogenbosch, 🇳🇱 Netherlands

On June 23th we will be hosting another BrabantJUG meetup. Our host HighTech Innovators in Den Bosch will be opening its doors for us.

With Rijo Sam and Jessica Siewert we have two awesome speakers who will share their knowledge!

Timetable:
17:00 Doors open
18:00 Food
18:50 Introduction
19:00 Java Beyond Frameworks: Avoiding Lock-In with Agnostic Design by Rijo Sam
19:45 Break
20:00 Help! I hate my teammate! by Jessica Siewert
20:45 Drinks

Java Beyond Frameworks: Avoiding Lock-In with Agnostic Design
The Problem: Modern Java apps often get stuck in their frameworks. Tools like Spring Boot and Quarkus speed things up, but they come with hidden costs such as vendor lock-in, heavy dependencies, and rigid architecture. So what happens when your app outgrows the framework or something better comes along?

The Solution: This talk introduces a layered approach to Java development, isolating framework dependencies while keeping core logic pure with Java and Jakarta EE. Through examples, you’ll see:
- Strategies for replacing framework-specific annotations
- Techniques to decouple business logic from frameworks
- Approaches to cloud integration without framework coupling

Trade-Offs: Yes, this demands more upfront effort, including writing custom persistence layers, rigorous tests, and meticulous documentation. But the payoff is code that’s adaptable, testable, and maintainable across frameworks, teams, and decades.

Key Takeaways:
- Practical patterns for agnostic design
- When (and when not) to adopt this approach

About Rijo
Rijo is a software developer and public speaker based in the Netherlands. He possesses extensive experience building applications in the payments and credit sector of the banking domain.

Outside of work, he’s usually on his bike trying to beat his cycling buddies.

Help! I hate my teammate!
Everybody now and then comes into a new team, or someone else comes into theirs. More often than not, cooperation does not go seamlessly straight away. Sometimes this evens out by itself along the way. But in many occasions, it does not. Ways of working could be different. Something one values a lot, may not be valued at all by another, creating conflict. One may criticise or get criticised and things get uncomfortable. Teams may split into "camps" or one person just never agrees with the others. Team members may feel stepped over, pushed aside or misunderstood. If this goes on for too long, team members start to feel generally disrespected and demotivated. Then there are
cases one member feels another is not qualified, or just a bully. This goes beyond forming and storming, this becomes a (team-wide) problem. In this talk you will see you are not the only one experiencing these challenges. You will hear experiences on solving these kind of cases (or not!), get an idea of how others deal with it and what your options are if you ever find yourself in the weeds (again). In any case, you probably will be surprised by yourself or your team mate in one way or another...

About Jessica
Jessica is a software engineer specialised in micro services in Scala and Kotlin. She has worked in Finance, logistics and since a few years, she has devoted herself to contribute to the Dutch Energy Transition. For this reason she joined Het ConsultancyHuis two years ago. Jessica has a great sense of team building and working relationships. To this end, during her 12+ years in the field, she has taken several training programmes and has fulfilled multiple roles as scrum master of teams. Even when she is not the scrum master, she takes pride in making significant contributions to the transcend of the team from the old team members to a team with all new members. In addition, in order to provide the users and people in The Netherlands a better experience regarding the enormous upgrade of the Dutch energy network, she takes joy and pride in working together with neighbouring teams. She likes to share her experiences in both engineering and working relationships with her fellow crafts(wo)men.

Tue 23 Jun · 15:00< 50
Software EngineeringMeetupFree

Go meetup @ ING

Amsterdam, 🇳🇱 Netherlands

We're back for our third Go Amsterdam meetup this year. ING is kindly hosting us at their offices in Amsterdam! Come join us and meet like-minded gophers, enjoy talks about Go, and just have a good time.

We will be meeting on Tuesday June 23.
Doors will open at 17:15, and we'll be getting started with the program around 18:00. Talks will end around 20:45. Drinks and snacks are provided by our generous hosts, and there will be a break, with time to meet & talk to fellow gophers.

Talks:
- "Logging Sucks (In Go)" by Manuel Doncel Martos
- "What's new in Go", by Loes Alleman
- "Go and WebASM - The 5 Hells of Web Assembly" - by Cookie Engineer
- "Going back to First Principles - Writing Go apps in the age of AI" - by Frank Schröder

Important: We will need your full name by Thursday June 18, and you must bring identification matching your name to the event, or unfortunately you won't be able to get in. Either change your meetup profile name to your full name, or send us a message with your full name (and the profile you signed up with).

Please keep your RSVP status up to date! Doing so helps organize the meetup tremendously (with waiting list, capacity planning, food & drinks). Thank you!

If you want to talk about Go right now, join us on channel #amsterdam at the existing gophers.slack.com workspace. Sign up through https://invite.slack.golangbridge.org/.

Hope to see you soon!

Cheers,
Go Amsterdam meetup team

PS: Photography/Video Consent. We will be taking photos and videos during the event and will use these photos and videos for social media, and promotional materials. By coming to the meet-up, you give us your consent to take photos and videos of you.

PPS: If you work at ING, you must register internally for this event and not at meetup.com.

Tue 23 Jun · 15:1550–200
AI Integration & ApplicationMeetupFree

Building Games with Spring Boot & Cyber: Zero Trust + AI setup demo & giveaway

Utrecht, 🇳🇱 Netherlands

Join our first meetup on 24 June 2026.

Program:
17:00 – 18:00 Walk-in + Dinner
18:00 – 18:45 Zero Trust: Applying Military Procedures to Cybersecurity Challenges - by Laurens Blankers (JDriven)
18:45 – 18:55 Break
18:55 – 19:40 Let's use Spring Boot to build games, because why not? - by Alexander Chatzizacharias (JDriven)
19:40 – 20:00 Practical AI Developer Setup Demo (by Alexander Chatzizacharias) — Learn how to integrate AI tools into your daily development workflow + Giveaway:
Win a 1-month Claude Code MAX subscription (worth €100)
20:00 – 21:00 Networking Drinks

About the talks:

Let's use Spring Boot to build games, because why not?
Alexander Chatzizacharias - JDriven
If you work on enterprise grade microservices on the JVM, you have undoubtedly heard of Spring Boot. Most developers see it as the reliable backbone of enterprise software. It is stable, predictable, and safe. But what if we took all those conventions and threw them out the window? What if we repurposed the IoC container, event listeners, and bean lifecycles to reveal what Spring Boot was always meant to be? A game development framework!

Join Alexander as he attempts to deconstruct and demystify the Spring ecosystem by forcing it to do things it was definitely not designed for. We are not talking about simple text adventures here. We are talking about building complex, real-time games like a Terraria clone or a souls-like RPG, all powered by the same annotations you use for your day job.
This session explores what happens when you learn technologies by breaking them. Whether you are a Spring veteran or a newcomer, this talk offers a fresh perspective on the tools you use every day. You will leave with a better understanding of how Spring Boot works under the hood and the inspiration to build something completely unnecessary, just because you can. Come for the absurdity, stay for the laughs, and see what happens when you strip away conventions and best practices in the pursuit of a wild idea.

Zero Trust: Applying Military Procedures to Cybersecurity Challenges
Laurens Blankers - JDriven

Cybersecurity is becoming more and more challenging. A lot of ‘new’ solutions are being proposed, including Zero Trust. Although, if you really drill down to the core, Zero Trust proposes a way of working which has been standard in military organisations around the world for over 80 years. Join me in breaking down Zero Trust into a number of easily understood principles including a number of approaches which can be applied to your software today.

Laurens is a Java Software Engineer with over 20 years of experience. He excels at extracting the bigger picture and applying this to the smallest details. He combines this theoretical knowledge with his vast practical experience and hands-on mentality. Laurens has significant experience with a number of Java based platforms, including Jakarta EE and Spring (Boot). Ranging from REST microservices in the cloud to applications for controlling custom hardware on the desktop. In his personal life Laurens enjoys Science Fiction, board games, and history of technology.

Practical AI Developer Setup Demo
Alexander Chatzizacharias - JDriven
After the talks, Alexander will give a live demonstration of his AI-powered development setup and workflow. Discover how modern AI tools can help you write code faster, improve productivity, automate repetitive tasks, and accelerate learning. You'll get a practical look at the tools, techniques, and workflows that developers are using today to get the most out of AI.

At the end of the demo, we'll hold a giveaway where one attendee will win a 1-month Claude Code MAX subscription (worth €100).

Wed 24 Jun · 15:00< 50
AI Integration & ApplicationMeetupFree

AI voor Test Automation in de praktijk

Groningen, 🇳🇱 Netherlands

Klaar met alleen maar al die AI-buzzwords en op zoek naar hoe het echt in de praktijk voor je kan werken? Tijdens de volgende TestCoders Noord MeetUp in de Mediacentrale Groningen laten we de de hippe termen voor wat ze zijn. We presenteren twee inhoudelijke talks die precies laten zien wat AI vandaag de dag wél (en niet) betekent voor jou als Test Automation professional.

Presentatie 1: Ywe van der Pol (Simplicate):

Test Automation & AI in de praktijk @ Simplicate

Naar aanleiding van de grote stap naar Continuous Integration, is bij Simplicate testautomatisering nog belangrijker geworden. En AI speelt daarin een steeds grotere rol. Zeker niet als vervanger van de testers, maar als slimme hulp die een andere inkijk kan geven in het repeterende werk wat er ook is. Dit zodat we ons als testers kunnen focussen op waar het echt om gaat: testen.
In deze talk neemt Ywe jullie mee in hoe ze bij Simplicate testautomatisering aanpakken: van het schrijven en onderhouden van tests tot het opsporen van discrepanties in de code. Hij laat zien waar AI tijd bespaart, waar het werkt, en waar ze juist tegen aanlopen.
Een eerlijke kijk in de keuken: wat werkt, wat niet, en wat ze onderweg (blijven) leren.

Presentatie 2: Jarsto van Santen (DUO):

Maar Wie Is Die Agent Dan?
Agents, skills, tool calls, context engineering, mcp servers, ralph loops, harnesses, caveman mode… Het lijkt haast alsof ze het erom doen en iedere vijf dagen een nieuwe term lanceren in de wereld van het programmeren met AI. En soms geef je zo’n systeem een opdracht en dan werkt het, magischerwijs ook nog.
Het was Arthur C. Clarke die ooit schreef “Any sufficiently advanced technology is indistinguishable from magic”. In de science fiction wereld staat dit dus ook bekend als “Clarke’s Law”. Maar juist voor Test Engineers zou Clarke’s law niet te snel in werking moeten treden. In plaats van blijven hopen dat het willekeurige magische systeem bij herhaald vragen het wel goed gaat doen is het juist aan ons om te doorgronden wat er gebeurt, om te weten aan welke knoppen we kunnen draaien als het gaat om kwaliteit, en wat de voor een nadelen van de verschillende ‘buzzword’ aanpakken zijn.
Dus gaan we proberen om door het gordijn heen te prikken en een kijkje achter de schermen van de wereld van agentic programmeren te nemen. Inclusief een blik op wat er gebeurt wanneer je (bijvoorbeeld binnen de overheid) niet zomaar al je code naar de cloud mag (of wilt) pompen en dus met een beperkter scala een kleinere (op eigen hardware draaiende) modellen moet zien wat je kunt bereiken.

De hosts
Ywe van der Pol werkt bij Simplicate, waar hij testautomatisering naar een hoger niveau tilt. Met een stevige achtergrond in het testvak, onder andere opgedaan bij gespecialiseerde testbedrijven en via zijn test-podcast De voorproeverij, richt hij zich op de praktische toepassing van nieuwe technologieën. Hij zoekt continu naar manieren waarop tools zoals AI de tester kunnen ondersteunen, zodat de focus blijft liggen op het échte testwerk.

Jarsto van Santen is Specialist Test Engineer bij Dienst Uitvoering Onderwijs (DUO). Binnen het 'Service Team Testautomation' helpt hij tientallen DevOps-teams om hun testautomatisering succesvol op te zetten en te gebruiken. Jarsto is een echte techneut met een passie voor kennisdeling en spreekt regelmatig over thema's zoals generatieve AI. Hij helpt engineers graag om de theorie en buzzwords rondom AI los te laten en te doorgronden wat er onder de motorkap gebeurt.

Doelgroep

  • Testers (met een technische achtergrond) en developers met interesse voor / ervaring met testautomatisering.
  • Deze presentaties zijn volledig in het Nederlands *Dutch spoken*

Programma

  • 17:00 Ontvangst en eten
  • 18:00 Korte introductie door Michel Hartog (directeur TestCoders Noord)
  • 18:30 Start presentaties (er is een korte pauze tussen de talks)
  • 20:00 Afsluiting met aansluitend een borrel

Heb je dieetwensen of voedselallergieën? Geef ze aan ons door, dan houden we hier rekening mee.

Thu 25 Jun · 15:00< 50
Software EngineeringMeetupFree

ArnhemJUG - June meetup

Arnhem, 🇳🇱 Netherlands

ArnhemJUG
We are excited to announce that we are welcomed by TenneT for the June meetup.

Please note that TenneT requires all visitors to present a valid ID upon entry and that we must provide a list of attendees in advance. For this reason, we need your full name as it appears on your ID. If your Meetup username is different from your real name, we'll get in touch before the event to confirm the name on your ID.

Also note that we start 10 minutes earlier than normal, the first talk will start at 18:20

Agenda

  • 17:00 CET walk-in
  • 17:30 – 18:20 Food and drinks
  • 18:20 – 19:10 talk: How we develop and maintain our (12 year old) DDD app by Dan Haywood
  • 19:10 – 19:30 break
  • 19:30 – 20:20 talk: AI augmented teams: from tab complete to AI workforce by Radek Kowalski
  • 20:20– 20:45 drinks

How we develop and maintain our (12 year old) DDD app
We’re a small team (about 2.5 FTEs) but we develop and maintain a big app - it processes €500m invoices in turnover each year, for a €4bn company that owns and operates shopping centres throughout Europe. And it’s a DDD app too … it’s our focus on the domain that allows us to do a lot with, well, not much.
In this talk we’ll try to explain our way of doing things, some of which might be obvious and you’ll know, some of which could be a bit more contentious or surprising. The technology may intrigue you, but the mindset is just as important.
About Dan Haywood
Dan Haywood is an independent consultant based in the UK, an ASF member and committer to Apache Causeway. He spends his days either cutting code or advising governments.

AI augmented teams: from tab complete to AI workforce
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 Kowalski
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.

Thu 25 Jun · 15:00< 50
Software EngineeringMeetupFree

Dutch Microsoft Entra Juni 2026 Meetup @ Inspark Amstelveen

Amsterdam, 🇳🇱 Netherlands

*** ALL SESSIONS ARE PRESENTED IN DUTCH ***

Donderdag 25 juni 2026 zijn we te gast bij Inspark in Amstelveen.

We hebben weer een paar mooie sessies op het programma, waaronder een sessie van Derk van der Woude over Agent 365 en Agent ID. Ook geven we graag het podium aan Richard van der Els met zijn sessie over Cloud PKI en Entra CBA. Samantha gaat ons meenemen in alles wat komt kijken bij het opzetten van een centrale Entra ID tenant voor B2B gebruik.

Uiteraard praten we je weer bij over de laatste features binnen Entra in onze lightning-sessie. Riemen vast!

Deze avond zullen de sessies in het Nederlands worden gegeven.

PROGRAMMA

17.00 - 18.00 Inloop & Eten

18.00 - 18:20 Welkom door onze host, Inspark.

Lightning talk - What's new in Entra? Een korte sessie door Jan, Pim, Michel of Stefan over de laatste features binnen Entra. Zo zijn jullie weer helemaal bij!

18.20 - 19.20 Eén Entra ID tenant, meerdere organisaties: de architectuur achter de samenwerking
Samantha Kloos-Kilkens

Netbeheerders in Nederland zijn geen concurrenten. Ze beheren samen de kritieke infrastructuur van het land en moeten steeds vaker nauw kunnen samenwerken. Toen de vraag kwam om een gedeelde Microsoft Entra ID tenant op te zetten waar meerdere organisaties veilig samen kunnen opereren, bleek al snel dat de standaardaanpak voor B2B hier niet volstaat.

In deze sessie loop ik door de architectuur en de securitybeslissingen van deze omgeving. Access governance, authenticatie en tenant hardening zijn ontworpen voor een omgeving die geen enkele organisatie in z'n eentje bezit.
We kijken hoe je users binnenkrijgt, hoe je gedelegeerd beheer organiseert met Administrative Units, hoe Conditional Access eruit ziet met meerdere doelgroepen en verschillende vertrouwensniveaus, welke MFA claims je van welke tenant wel of niet vertrouwt, en wat tenant hardening betekent wanneer samenwerken net zo belangrijk is als security.

Voor iedereen die identity architectuur ontwerpt waar meerdere organisaties één tenant delen, en waar security geen bijzaak mag zijn.

19.20 - 19.30 Korte pauze

19.30 - 20.00 Cloud PKI and certificated-based authentication - Richard van der Els

The benefits of Cloud PKI how to setup and how to use it.

In deze presentatie neem ik jullie mee in hoe makkelijk je Cloud PKI opzet je de certificaten kunt distribueren en deze vervolgens ook kunt gebruiken om jezelf te authenticeren.

20.00 - 20.20 Pauze

20.20 - 21.20 Agent 365 Security from an Entra perspective

  • Derk van der Woude

AI-agents zijn niet meer weg te denken uit de moderne werkplek. Microsoft 365 Copilot, autonome agents, geautomatiseerde workflows — ze schieten als paddenstoelen uit de grond. Maar wie beheert en beveiligt al die digitale collega's eigenlijk?
In deze sessie duiken we diep in het Entra Agent ID-platform: de plek waar Microsoft identiteitsbeheer voor AI-agents samenbrengt. We beginnen met de fundamenten — wat is een Agent ID, hoe werkt het platform, en welke beveiligingsbasisprincipes gelden er voor niet-menselijke identiteiten?

Daarna gaan we écht de diepte in. Want agents zijn net mensen: ze hebben toegang, ze maken fouten, en ze kunnen misbruikt worden. We bekijken hoe ID Protection risicovolle agentgedrag detecteert, hoe je met Conditional Access granulair toegangsbeleid afdwingt voor agents, hoe Identity Governance zorgt dat agents alleen krijgen wat ze nodig hebben — en niet meer — en hoe Secure Access de verbindingen van agents naar resources beschermt.

Na deze sessie ga je naar huis met een helder beeld van het Entra-beveiligingslandschap voor agents, concrete handvatten om je eigen agentomgeving te beveiligen, en misschien een gezonde dosis paranoia over alles wat er al rondloopt in jouw tenant.

21.05 - 22.15 Ruimte om gezellig bij te kletsen onder het genot van een hapje/drankje.

Thu 25 Jun · 15:00< 50
Software EngineeringMeetupFree

PostgreSQL Usergroup NL Summer of 2026 Meetup

Amsterdam, 🇳🇱 Netherlands

Dear all,

With summer just around the corner, we are happy to invite you to the Summer Edition of the PostgreSQL User Group NL Meetup on June 25th 2026 in Amsterdam.

This time we have been invited by Databricks to host the event in their Amsterdam headquarters. We are very appreciative of this gesture and we like to thank them for supporting the PostgreSQL community with the venue and the hospitality.

On the agenda we have two PostgreSQL experts in their field. First up is an alumni presenter of the PostgreSQL User Group, Matthias van der Meent, who will be taking us on a deep dive into one of the better known index types: GiST. Next on the program is Bart Orbons, who will centre his presentation around grouping.

As usual, we have reserved some space in the program for anyone who wants to do a lightning talk. If you are interested, please contact us via a personal message on meetup.com.

We are very grateful for the contributions of both presenters as well as our host, to make this all possible for the PostgreSQL community in the Netherlands.

We hope to meet many of you at the meetup — a moment where PostgreSQL users can connect, share knowledge, and discuss the latest developments in the PostgreSQL ecosystem.

We look forward to a great meetup!
Feike Steenbergen Gerard Zuidweg


Meetup Program
17:30 – 18:25 — Welcome, Beer & Bites 18:25

18:30 — Opening

18:30 – 19:10 — GiST indexes: An analysis – Matthias van der Meent
Abstract: PostgreSQL has various index types, each supporting different query patterns and behaviours. In this talk, Matthias will go over one of the better known index types: GiST — how and where it is used, how it works, its strengths, its weaknesses, and some possible improvements.
About Matthias: Matthias van der Meent is a PostgreSQL hacker and contributor with over 5 years of contributions to the project. His focus is mostly on subsystem performance, indexing, and resource usage.

— (Very) Short Break —

19:15 – 19:55 — 'Grouping, the way you want it' – Bart Orbons
Abstract: This talk dives into PostgreSQL's advanced grouping features, showing how to go beyond a plain GROUP BY to aggregate data exactly the way you need it. Expect practical examples that make complex reporting queries simpler and more powerful.
About Bart: PostgreSQL user and enthusiast. Started using PostgreSQL in 2000 and has not stopped since — having worked before with Sybase and Oracle, but not anymore. Until four years ago, Bart worked at XS4ALL Internet as a technical software architect focused on database and software modelling, until the company was folded into its parent organisation. He then helped migrate the customer base into their systems before moving on to his current role at Z-CERT, where he helps set up company administration and systems. A regular at pgconf.eu, this talk is part of a series Bart originally created for colleagues at XS4ALL to improve their SQL skills and introduce newer features of the SQL language.

19:55 – 20:00 — Lightning Talks

20:00 – 20:30 — Wrap-up and drinks

Thu 25 Jun · 15:3050–200
Software EngineeringMeetupFree

Stack and Tap

Eindhoven, 🇳🇱 Netherlands

Stack & Tap
Fullstack talks en goed bier voor developers.

Veel van de beste gesprekken over software ontstaan niet tijdens een presentatie, maar daarna. Wanneer engineers samen verder praten over de keuzes, uitdagingen en oplossingen achter de systemen die ze bouwen.

Stack & Tap brengt die gesprekken samen in één avond met technische talks, pizza tijdens de inloop en goed bier na afloop.
Stack & Tap is een meetup in de regio Eindhoven voor iedereen die graag praat over software engineering in een ontspannen setting. Een avond waar techniek, praktijkervaring en goede gesprekken centraal staan.

Tijdens elke editie delen engineers hun ervaringen uit projecten waar zij dagelijks aan werken. Geen theorie of marketingverhalen, maar concrete inzichten uit de praktijk. Denk aan architectuurkeuzes, technische uitdagingen en oplossingen die zijn ontstaan tijdens het bouwen van moderne software.

Het idee achter Stack & Tap is simpel: een plek creëren waar je nieuwe inzichten opdoet, ervaringen kunt delen en in gesprek raakt met anderen die net zo enthousiast zijn over software als jij.

Programma
18:00 – Inloop (met pizza)
18:30 – Opening
18:35 – Steven van den Hout - What if your documentation could think?
19:10 – Korte break
19:20 – Iain van der Wiel - Lost in Translation
19:50 – Netwerken en bier
21:00 – Einde

Tijdens de inloop zorgen we voor pizza zodat je rustig kunt binnenkomen, iets kunt eten en alvast andere aanwezigen kunt ontmoeten voordat de talks beginnen.
Na de talks is er alle ruimte om verder te praten, vragen te stellen en nieuwe mensen te ontmoeten.

What if your documentation could think?

Wat als documentatie niet alleen kennis opslaat, maar actief meedenkt in engineering beslissingen?

Bij Jumbo ontwikkeld Steven een LLM maintained wiki voor het GraphQL platform. Deze wiki doet meer dan documentatie bijhouden. Door research, richtlijnen en operationele data samen te brengen in één groeiend kennisobject, wordt het systeem gebruikt om nieuwe architecturen te ontwerpen en technische keuzes te onderbouwen.
De aanpak werd onder andere ingezet voor het ontwerpen van platformoplossingen, het ondersteunen van strategische besluitvorming en het genereren van technische voorstellen.
In deze talk laat Steven zien hoe een LLM driven wiki kan uitgroeien van documentatie naar een actief onderdeel van engineering besluitvorming en architectuurontwikkeling.

Lost in Translation

Hoe gedeeld begrip de kloof tussen communicatie en verwachtingen overbrugt

Een feature klinkt eenvoudig. Het ontwerp is duidelijk. De API lijkt logisch. En toch levert het eindresultaat discussies, verrassingen of misverstanden op.
In deze sessie kijken we naar hoe informatie verandert terwijl deze door business, product, design en engineering beweegt. We verkennen waarom communicatieproblemen vaak systeemproblemen worden, hoe AI deze problemen soms versnellen, en hoe technieken zoals ADR's, Domain-Driven Design en Event Modeling helpen om gedeeld begrip te creëren.
Want betere software begint niet bij betere code, maar bij beter begrip.

Over het bier
De tweede helft van de naam zegt het al: Tap. Na de talks gaat de bar open en is er ruimte om de avond voort te zetten met een goed glas bier.

Bij elke editie staat er een speciaalbier centraal. Een mooie aanleiding om na de talks nog even te blijven hangen, verder te praten over de sessies en nieuwe gesprekken te starten.
Veel goede ideeën en technische discussies ontstaan namelijk niet tijdens een presentatie, maar juist aan de bar.

Niet commercieel karakter
Stack & Tap is een niet commercieel event dat volledig draait om kennisdeling. Het is geen sales event en ook geen recruitment event. Er worden geen diensten gepromoot en er zijn geen wervingsactiviteiten.
Het doel is simpel: een open avond organiseren waar software engineers samenkomen om ervaringen uit te wisselen en inspiratie op te doen.

Voor wie is dit event
Dit event is bedoeld voor iedereen die geïnteresseerd is in moderne softwareontwikkeling en het leuk vindt om met anderen over technologie te praten.

Werk je bijvoorbeeld met:
•⁠ ⁠Frontend development
•⁠ ⁠Backend development
•⁠ ⁠Fullstack development
•⁠ ⁠Cloud en platform engineering
•⁠ ⁠Software architectuur

Dan zit je hier waarschijnlijk helemaal goed.

Aantal plaatsen
Om de avond persoonlijk en interactief te houden is het aantal plaatsen beperkt tot 30 deelnemers.

We houden het event bewust kleinschalig zodat er ruimte is voor goede gesprekken. Wil je erbij zijn, meld je dan op tijd aan. Zodra de plekken vol zijn sluiten we de registratie.

Thu 25 Jun · 16:00< 50
AI Integration & ApplicationMeetupFree

Talk to Your Data: Production-Grade AI Agents for Analytics & Finance

Amsterdam, 🇳🇱 Netherlands

⚠️ Important Note:
PyData Amsterdam is transitioning to Luma.

  • Please subscribe to PyData Amsterdam on Luma: https://luma.com/pydataamsterdam
  • And register at the Luma link for this event : https://luma.com/1zt31rv6

---------------------------------------------------------------------------------

🎬 From Clean Data to Big-Screen Agents: Meet us at Cinema The Pulse! 🎬

Our last meetup tackled scaling data pipelines for pristine data quality. Now that the data is clean, let's make it actionable.

We are thrilled to announce our next meetup on Thursday, June 25th, 2026, hosted by ManyChat!

We are taking over Amsterdam's premium Cinema The Pulse! No office rooms this time, architecture diagrams are getting the full, high-fidelity big-screen treatment.

🔍 The Focus: Production-Grade Agents
Anyone can prompt a model to generate a basic SQL query in a demo. Building a trustworthy system that safely queries everything from company business metrics to critical treasury data is a completely different challenge. We are peeling back the architecture of real, production systems, including a tool built on Claude Code that lets non-technical users bypass the analyst queue by simply typing /ask.

You will learn the exact engineering patterns needed to transition from prototype to production:

  • Open Architecture: Designing thin-client plugins, FastAPI services spawning headless Claude, and a "brain" repo for metric definitions.
  • Smart Routing: Directing plain-English questions to the right business domain and handling multi-turn follow-ups seamlessly.
  • Security & Isolation: Enforcing multi-tenant data isolation, blocking destructive SQL, and preventing prompt injections.
  • Reliability Tactics: Taming hallucinated columns with curated views and handling schema drift in highly regulated fintech industries.

Excited to see how production-grade agents actually work under the hood? Space is limited in the theater, so grab your seat now for an evening of high-signal engineering insights, cinematic views, and great networking with the PyData Amsterdam community!

Agenda:

  • 18:00 - 18:55: Welcome with food and drinks! 🍺🍕
  • 18:55 - 19:00: Host company intro - Manychat
  • 19:00 - 19:45: Talk 1: Answers You Can Question: Building a Trustworthy Self-Service Analytics Agent by Alex Litvinov
  • 19:45 - 20:00: Short break
  • 20:00 - 20:45: Talk 2: From chat to insight: reliable AI agents for financial data by Niels Neerhoff
  • 20:45 - 21:30: Networking & drinks

Talk 1 : Answers You Can Question: Building a Trustworthy Self-Service Analytics Agent
By Alex Litvinov

Talk Summary
At Manychat we built an analytics agent on top of Claude Code that lets non-technical employees ask data questions in plain English—no SQL, no analyst queue. A teammate types /ask and a question; the agent clarifies it if needed, routes it to the right business domain, writes guarded SQL against curated views, and returns a formatted answer—multi-turn, so follow-ups just work.

This talk walks the build from prototype to production. We’ll open up the architecture—a thin client plugin, a FastAPI service spawning headless Claude, and a “brain” repo of always-on rules and per-domain metric definitions—and the hard parts: routing questions to the right domain, taming hallucinated columns with curated views, blocking destructive SQL, and scoping data access safely.

Bio
From bioinformatics to backend systems, Alex has spent 15+ years building data-heavy software across healthcare and science. Today he’s a Data Engineer at Manychat, working where platform data engineering meets ML/AI.

Talk 2 : From chat to insight: reliable AI agents for financial data
By Niels Neerhoff

Talk Summary
With the rise of chat interfaces, users increasingly expect to interact with their data in plain English. Large language models make this possible, but deploying a model against financial data introduces risks.

This talk walks through the engineering challenges of building a natural language interface for treasury data: the kind of tool where a CFO can ask, "What's our net cash position this quarter?" and get a trusted answer, without writing any SQL.

We'll cover topics such as multi-tenant data isolation, schema drift, prompt injection, and why you can't rely on the model to enforce access control. Drawing on production experience at Palm, a fintech platform for cash flow forecasting and treasury management, we'll look at the patterns that make NL-to-SQL agents reliable enough for users in a regulated industry. You'll leave with concrete techniques for building agents that are capable, and safer to ship.

Bio
Niels is a software engineer working on data and AI, with an interest in reliable, autonomous systems. He cares about architecture, testing, and automation. When not working, you'll find him on his gravel bike, or listening to all sorts of music.

Directions
📍 Cinema The Pulse, Hildegard Von Bingenstraat 4, 1081 LH Amsterdam, Netherlands Hall #4. Just a 5 min walk from the Amsterdam Zuid train station.

Thu 25 Jun · 16:00< 50
SecurityMeetupFree

🕹️ SecTalks :: Hackers & Defenders of the "Cyber" Security Arena

Rotterdam, 🇳🇱 Netherlands

THEME:
Let's meet for an informative session where you can ask security experts any questions you have in your mind no mater how basic or advanced that is. Every month we try to have a different topic, and there's always time to discuss anything important to you as well!

FAQ:
▶️ The heck is SecTalks?
✔️ SecTalks meetups are about participating in information and cyber security discussions, learning from others, and improving problem-solving skills.

▶️ Where & When is this event? What?
✔️ Every LAST Thursday of the month 18:30 at CIC Rotterdam, (along the Venture Cafe / GHG drinks); SecTalks continues as usual & we still meet at the same place! Doors open at 17:30 - drinks and snacks provided!

▶️ I want to speak at your talk
✔️ Cool, message us here on Meetup.com and get in touch, or on twitter, or be creative!

▶️ Does it cost me something?
✔️ No.

▶️ Cool idea, I want to sponsor the event.
✔️ If you want to sponsor these sessions please get in touch via messages or on twitter with the organizers, Nicolas @nicolasnow

SecTalks takes place at the CIC innovation community - and part of the Venture Cafe Rotterdam gathering which is now (temporarily?) on halt.

Doors for SecTalks open at 17:30 we have drinks (and some snacks). SecTalks session starts at 18:30. If you are there earlier, drop a line so we can connect and socialize more.

Notes:
💡 Got feedback? DM here on Meetup.com or DM on twitter/X @nicolasnow or @xxByte

Thu 25 Jun · 16:30< 50