BuildJam AI Founders — Mentor-led hackathon

Startup Grind Madrid held BuildJam AI Founders in Madrid on May 20, according to the event’s Luma page and the week’s local tech-events roundup. The session was scheduled from 5:30 p.m. to 9:00 p.m. at C. de Orense, 4 in Madrid, with registration subject to host approval. The listing described the event as a one-evening build session for people with or without a startup idea. The event also appeared in Qué Pasa en Madrid’s Week 21 guide covering May 18 to May 24. ### How was BuildJam AI Founders described by organizers? The Luma page for BuildJam AI Founders said Startup Grind Madrid was bringing together entrepreneurs and builders from the city for a format aimed at moving attendees “from idea to real prototype” in a matter of hours. The page said the event was hosted in the offices of Glovo, which it described as one of Spain’s strongest startup operators. The same listing said attendees would get access to mentors from Madrid’s startup ecosystem, AI tools including Lovable, and practical frameworks for building, validating and launching. Organizers said the event was open both to people who already had an idea and to those who wanted to join a team and start from zero. ### What did participants actually do during the evening? The published agenda set out a four-part format. The event was due to begin at 17:30 with welcome remarks, an introduction and team formation, followed by a two-hour “Build Sprint” starting at 18:00. At 20:00, the program shifted to feedback and mini pitches, according to the Luma listing. The final hour, beginning at 21:00, was reserved for networking. Organizers said the goal was to create a prototype — an app, website or product — in under three hours, get feedback from other builders and leave with a plan for continued development. ### Who was behind the Madrid event? Startup Grind Madrid was named as the lead organizer on the Luma page. The same event also appeared on Luma’s Make AI Global Calendar, which listed it as being presented by Startup Grind Madrid, AI Founders Madrid and Make. The AI Founders Tour website describes AI Founders as a four-week program of practical BuildJam sessions for entrepreneurs, designers, marketers and builders who want to turn ideas into MVPs with AI. That broader framing matches the Madrid event’s emphasis on rapid prototyping, tools and guided execution. ### Where does Glovo fit into the event? The Madrid listing said Glovo was opening its offices to host the session at C. de Orense, 4. The organizer text said participants would be “surrounded by people who are creating the future,” tying the venue to the city’s startup network rather than presenting it as a public conference hall. The location matters because the event was pitched less as a lecture and more as a working session. The published format focused on team formation, a timed build sprint and feedback rounds rather than keynote talks or panel discussions. ### How was the event surfaced to Madrid’s startup community? Qué Pasa en Madrid included BuildJam AI Founders in its Week 21 roundup for May 18 to May 24. The Substack publication bills itself as a guide to business and tech events in Madrid for professionals and entrepreneurs. The event was also distributed through Luma, where registration required approval by the host. The Make AI Global Calendar carried the same May 20 entry, adding another distribution channel for people following AI and builder events across cities. ### What comes next for people who missed it? The May 20 BuildJam was presented as a single evening session, but the AI Founders Tour site frames BuildJam as part of a weekly program built around turning ideas into MVPs with AI. The event page remained the main place to track registration details and the published agenda, while Qué Pasa en Madrid’s weekly guide showed how similar Madrid startup events are being surfaced to local founders and builders.