Builders^BETA

People who brought their creativity to a Product Build Day, built it with AI, tested it with users and left with a working app.

Editor in chief

Product Build Day // Stockholm16 September 2026

Software Engineer

Product Build Day // Stockholm16 September 2026

Anna Farman Berg

Customer Success Manager

Product Build Day // Stockholm16 September 2026

Product Build Day // Stockholm16 September 2026

People insights analyst

Product Build Day // Stockholm16 September 2026

Mohamed Messaoud

AI- och digitaliseringsansvarig

Product Build Day // Stockholm16 September 2026

Art director / brand & digital

Product Build Day // Stockholm16 September 2026

Product Build Day // Stockholm16 September 2026

Software engineer

Product Build Day // Copenhagen15 September 2026

Product Build Day // Copenhagen15 September 2026

Digital Experience Designer

Product Build Day // Copenhagen15 September 2026

Carina Sandholm

Product Manager

Product Build Day // Copenhagen15 September 2026

Nicolai Vangsgaard

Production Manager

Strandmøllen A/S

Product Build Day // Copenhagen15 September 2026

Product Build Day // Copenhagen15 September 2026

Vladimir Deriugin

Product Build Day // Copenhagen15 September 2026

Product Designer

Product Build Day // Amsterdam14 September 2026

Full Stack Software Engineer

Lean Management Instituut

Product Build Day // Amsterdam14 September 2026

Mihaela Ciulianu

Sustainable Investment Strategist

Product Build Day // Amsterdam14 September 2026

Ricardo Novais Pereira

Digital Designer

Product Build Day // Amsterdam14 September 2026

Sonia Alejandra

Product Manager

Product Build Day // Amsterdam14 September 2026

Odisseas Karipis

Digital Strategist

Product Build Day // Athens11 July 2026

Athina Patrikas

UI/UX Designer & Art Director

Product Build Day // Athens11 July 2026

Lamprini - Lydia Petropoulou

Art Historian | Art Educator | Mindfulness and Meditation Instructor

Product Build Day // Athens11 July 2026

Nafsika Georgakopoulou

Senior Product Designer

Product Build Day // Athens11 July 2026

Flutter Engineer

Product Build Day // Warsaw4 July 2026

Senior Business Data Analyst

Product Build Day // Warsaw4 July 2026

Tatsiana Sakalova

Product Build Day // Warsaw4 July 2026

Yevhenii Harychev

Product Engineer

Product Build Day // Warsaw4 July 2026

Technical Program Manager

BrightStar Lottery

Product Build Day // Warsaw4 July 2026

Senior Product Designer

Product Build Day // Warsaw4 July 2026

Were you in the room and are not here yet? Add yourself.

Product Build Day. One day in. One decision out.

One-day, in-person vibe-coding build days where product people who do not code build working apps with AI tools and test them the same day. Tools like Lovable, Bolt, Replit, and Cursor do the typing. You do the thinking. Run in English across Europe by Marcin Klimaszewski.

Product Build Day // Pro, 490 EUR net per seat

A full day for senior product managers and product designers. Bring one real challenge from your own backlog. Before the day: a challenge-sharpening tool and a 1:1 call. On the day: design the cheapest validation test, build a working app with AI tools, test it with synthetic users and 16 senior peers, and leave with a working app at a URL plus a tested validation plan. Guarantee: no working app and no tested plan by 17:00, money back. Invoice with correct EU VAT, so it goes on the company card. 16 seats, by application, max 3 per company. Join the Pro list.

Product Build Day // Teams, from 5,900 EUR net

The same method inside your company. Up to 20 people build against your riskiest bets, with synthetic user testing included, real-user testing optional, a written debrief within a week, and a go, pivot, or stop decision made in the room. About 295 EUR a head at full size, one invoice, NDA-friendly. It starts with a free 15-minute fit call. Book the call.

Free community evenings, autumn 2026

Free evenings run three hours, usually 18:00 to 21:00. Copenhagen runs 17:00 to 20:00. They are free, in English, 16 seats per city: Amsterdam 14 September, Copenhagen 15 September, Stockholm 16 September, Berlin 17 September, London 8 October. See all events.

Proof

21 non-coders shipped 21 working apps in one Saturday in Warsaw. A museum set the brief and 22 people built the answer in Athens. Ionian Technologies built four product directions in one private day in Thessaloniki and tested them on the street the same afternoon. Both public days sold out.

The method, free

The Facilitator's Playbook has the whole method, Creative Commons BY-SA. Get the PDF. Prices for all three formats are public on /compare.

Contact

One inbox for everything: the contact form or contact@productbuildday.com. Answered within a business day.