Tech Events in Utrecht

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.

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).

Artificial Intelligence (AI) conference in Utrecht, Netherlands

Kom op donderdag 25 juni 2026 gezellig bijpraten onder het genot van een hapje en drankje bij Het Gegeven Paard in Utrecht. Wees welkom!

We zullen ruimte reserveren voor hen die graag een hapje mee-eten. Daarom is het wel zo fijn als je kenbaar maakt dat je komt.

NB: De kosten voor het eten en drinken zijn voor eigen rekening, met het eerste drankje op kosten van Fronteers. De reservering die we maken staat op naam van Anneke Sinnema.

Het Gegeven Paard is vlakbij station Utrecht gelegen. Het café bevindt zich op de begane grond van TivoliVredenburg, is ook toegankelijk met een rolstoel en beschikt over een rolstoeltoegankelijk toilet. Heb je een beperking waarbij wij het voor jou op enige manier ook gemakkelijker kunnen maken om deel uit te maken van deze bijeenkomst, stuur dan gerust van te voren een bericht naar anneke@fronteers.nl . We hebben je er graag bij :)

Let us meet, have a coffee and code together, or just discuss :)!

This Meetup is everyone that considers himself "Techie", in the broad sense and wants to socialize :).
Join us and chat, ask your questions, or work on your own projects. The choice is yours! There is no agenda, this is simply a gathering of interested folks :).

We're meeting at Lebkov right inside the Utrecht Centraal station. We're typically sitting at the large table. Search for the folks with the laptops in the back!

You are very welcome to join whether you are an experienced developer, or simply interested and want to chat!

Parking: Please use public transport if possible. If arriving by car, use a P+R or park at the Jaarbeurs parking (paid).
Public Transit: 5 minute walk from Utrecht Central station

Event Schedule

17:00 — Doors open & walk-in
17:30 — Dinner
18:30 — Welcome
Atanas Aleksiev — Rabobank Engineering Services AWS team
18:35 - Disasters don’t announce themselves—and recovery is only as good as your last backup strategy
Rabobank Engineering Services AWS team
19:10 - From Innovation to Enterprise: Scaling a Compliant, Microservices-Driven AWS Platform
Rabobank ODP Next team
19:50 - Break ☕
20:00 - EDSN as the Digital Backbone of the Energy Market: Use Case, Technology Choices and Challenges
Energie Data Services Nederland
20:40 - Drinks & Networking 🍻
21:30 -Event ends

Summary of the talks

Talk 1: In this talk, we’ll walk through how Rabobank designs for failure using AWS Backup: from automated policies and immutable vaults to restore testing and ransomware protection. Because resilience isn’t just about having backups—it’s about knowing they work.

Talk 2: What happens after an innovation delivers a promising platform before it’s ready for enterprise scale, governance, and speed? That’s where our journey begins. You’ll hear how we evolved the architecture to support over 100 microservices powering digital lending on a compliant-by-design AWS environment. We’ll share the decisions we made along the way: what we kept and what we changed. Central to our approach is Infrastructure as Code to enable consistency, repeatability, and control on the platform. We’ll show how this foundation helped us automate operations, accelerate delivery, and meet strict compliance requirements. Join us to learn how to bridge the gap between innovation and enterprise readiness, turning a promising start into a scalable, secure, and developer-friendly platform.

Talk 3: EDSN acts as the digital backbone of the energy market, supporting essential data exchange processes across the energy market value chain. We explore this role, the underlying IT foundation, and the challenges and trade-offs that come with it.

Spots are limited: https://tickets.voxxeddays.com/event/workshop-victor-rentea

Build faster, smarter software with AI.
Join an exclusive, fully catered workshop with Victor Rentea on Agentic Engineering in a small, focused group of engineers.

Upgrade your development workflow to 2026.
A hands-on day on AI Coding Agents: prompt & context engineering, multi-agent orchestration, spec-driven development, and self-improving skills.
Learn how engineers reach 2x–10x productivity and what it takes to get there.

For: all engineers (backend, frontend, QA, data, ops)
Bring: laptop with Claude Code + subscription (Pro is enough)
The agenda of the day
Introduction

• LLM Fundamentals: Predictions, Tokens, Context Window, Compaction, System Prompt, Model vs Agent Harness
• AI Pitfalls: Sycophancy, Hallucinations, Attention Dilution, Knowledge Cutoff, Premature Fixation
• MCP Tools – best-of

Context Engineering

• Evolving a Token-Efficient Project Memory
• AI Context Sharing across repos, teams, and company
• Skills and Custom Agents that self-improve
• Token-Efficiency Tricks: context hygiene, DRY, grep-logs antipattern

Prompt Engineering & Orchestration

• Prompt Engineering – does and dont’s
• Brainstorm, plan & generate a non-trivial change with AI
• Multi-Agent Orchestration Patterns: handover, reviewer, orchestrator, advisor,…

AI Guardrails & Security

• Functional Guardrails with State-of-the-art Acceptance Tests
• ⁠Code Quality Guardrails AI cannot circumvent
• ⁠Architecture Guardrails & Exact Summarisation
• APIs, C4 Model, sequence diagrams
• AI Supply-Chain Attacks Attacks and Agent Isolation Techniques

Date: Wednesday, July 1st (09:00 - 17:00)
Location: Utrecht (venue TBA)
Price: € 395,- (incl. lunch & drinks)

Spots are limited: https://tickets.voxxeddays.com/event/workshop-victor-rentea

Cloud conference in Utrecht, Netherlands