I Hosted a Hackathon With the World's Fastest-Growing Startup (It Changed the Industry)

Why It Matters

It proves AI’s commercial potential in entrenched sectors like real estate, prompting investors and incumbents to fund niche solutions and replicate the model continent‑wide.

Key Takeaways

• Hackathon attracted 50 senior engineers from top tech firms.
• Real‑estate focus forced participants to build feasible, innovative AI solutions.
• Winner created AI zoning‑forge, cutting consulting costs dramatically.
• Event secured media coverage, investor interest, and industry replication plans.
• Demonstrated AI’s high ROI in legacy sectors like construction.

Summary

The video chronicles an eight‑hour AI hackathon organized in Stockholm by the narrator, a Langchain ambassador, in partnership with two fast‑growing AI unicorns, Landin and Lovable. The event targeted the trillion‑dollar real‑estate and construction sector, inviting roughly 50 senior engineers from firms such as PayPal, BMW, CLA and Ericsson.

Participants were challenged to build feasible, user‑friendly, and innovative solutions using LangChain and Lovable’s text‑to‑code platform. Judging criteria emphasized industry viability, UX for a traditionally older user base, and genuine innovation beyond simple property listings. Over 200 registrations poured in before the cap, and the organizer provided a research brief to spark ideas.

The top project—a “zoning forge” AI agent—simulates planning‑authority responses, allowing developers to assess approval odds without costly consultants. The winner received LangChain swag, credits, and a $2,000 LangSmith credit, and announced plans to spin the prototype into a startup. Media outlets across Sweden covered the hackathon, and investors and construction executives approached the organizer for future events.

The hackathon demonstrates how AI can unlock value in legacy industries, where unstructured data and outdated workflows dominate. By showcasing tangible ROI and attracting cross‑industry attention, the event signals a growing appetite for niche AI applications and sets a template for similar sector‑focused hackathons across Europe.

Original Description

I hosted an AI PropTech hackathon together with Lovable, the fastest growing startup in the world, and LangChain.

The hackathon was the first of its kind and became the front page on several news sites, and garnered attention from AWS and other major companies.