ArnhemJUG - June meetup

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.