Fleek x a16z Hackathon London

Join Fleek and a16z for a one-day hackathon to build vision-language and LLM-powered tools that make circular fashion work at scale. Spend the day building with mentors from the Fleek product and engineering teams, ship a working demo, and compete for Cursor prizes.Secondhand is the fastest-growing corner of fashion - and the hardest to scale. Every item is one-of-a-kind: a single photo, no SKU, no clean data. New retail is a solved problem; secondhand is wide open. It's exactly the kind of messy, visual, real-world challenge that modern AI was built for.Judges:Bring a laptop and an idea. Leave with something real!The Challenge: pick a track🔍 VisionVision-language models for the hard parts of resale: cataloging, grading, authentication, defect detection, and visual search across millions of unique items.🤖 Agents & LLMsAgentic and LLM-powered tools for sourcing, pricing, GTM tooling, negotiations, customer experience, and ops automation.♻️ Circular MoonshotOpen wildcard - anything that pushes the circular economy forward: impact measurement, waste reduction, or reimagining how people buy and sell secondhand.Agenda9:30 – Doors open, check-in & breakfast10:30 – Welcome from Fleek11:00 – Build begins!13:30 – Lunch14:30 – Build + mentor office hours (Fleek eng team)16:30 – Checkpoint18:00 – Submission deadline18:30 – Demos20:00 – Awards20:30 – Drinks & networkingPrizesWhat you'll getWho should joinEngineers, ML/CV practitioners, designers, and founders who want to build AI for good products. Mid-to-senior engineers especially welcome. Come solo or with a team - we'll help solo builders find one.What to bringPartnersFAQDo I need a team? No - come solo or with up to four. We run team formation in the morning.How technical do I need to be? This is a builder's hackathon - you should be able to ship something in a day. Designers and PMs are welcome on teams.Who owns what I build? You own your work.Is it really free? Yes. Capacity is limited and registration is approval-based, so RSVP early.Accessibility / dietary needs? Tell us your dietary requirements when you register.We're hiring 👋Fleek is actively hiring engineers, and this is the most fun way to meet the team. Check out open roles here: joinfleek.com/careers