HackBarna · 19 and 20 September 2026 · Norrsken House Barcelona
AI wrote the code all weekend. Could the teams defend it?
We sponsored the third edition of HackBarna, the hackathon that ran alongside AI Summit Barcelona. 150 builders had 30 hours to make something, and our challenge track asked them to show it would hold up.
150 builders
Two days at Norrsken House, with no-code tools, vibe coding, agents or a full stack.
22 in our track
People who entered the Production Ready challenge.
+20% score
One team raised its Norma score by about 20% over the weekend.
3rd overall
Bye-Bye Scammer won our track, then took third prize from the HackBarna jury.
Our challenge track
Production Ready: ship AI code you can defend
The brief fit on one slide. AI has been writing your code all weekend. Can you defend it?
Whatever an agent generates, the person who ships it answers for it. Teams could point Norma at their repository and check the code as they built.
The prize: a mechanical keyboard for each member of the winning team, a Norma vest, and 12 months of Norma Pro.
Track winner
Bye-Bye Scammer
An iPhone app that listens to an incoming call and tells you whether it’s a scam. It checks whether the voice is AI-generated, then scores what the caller is asking for: the fake call from your bank, the sudden push into crypto. You choose how sensitive it is.
The team built it in about 30 hours and used Norma on the code. The HackBarna jury gave them third prize overall, for the impact of the idea.
The demos
Every team, on stage
HackBarna streamed the final demos and the prize-giving live on Sunday 20 September. Bye-Bye Scammer’s pitch starts at 51:56 and the Quality Clouds award at 2:08:06.
“We also used Quality Clouds a lot. We improved our score like 20%.”
The team behind Karen, an AI meeting moderator, during their demo.
Norrsken House
The weekend
Two days later
We ran a workshop at AI Summit Barcelona
On 22 September we took the same question to Workshop Room B at the World Trade Center: 80 minutes and six tasks, from a prompt with no context to an agent checking its own work.
Point Norma at your own repository
It’s the same check the HackBarna teams ran all weekend. The free plan is permanent and needs no credit card.