DevDay Exchange Community: Paris

Compete for one of 10 tickets to the official DevDay Exchange in Paris on 28 October. How it works 24–26 October · online build weekend Join the online kickoff on 24 October at 10:00 AM, Paris time, and meet fellow builders. Come with a team or work solo. There will be time to form teams at the kickoff. Teams can have up to 4 people. Build with Codex or the OpenAI API 26 October · Demo night Present your project in a short demo with Q&A. Get feedback from judges and fellow builders. Celebrate the winners and meet the Paris community. Choose your ticket Hackathon participants: join the online build phase, kickoff, and demo night. Demo night visitors: come along on 26 October to watch the demos, meet builders, and celebrate the winners. Finale programme 18:00 — Doors open, introductions, and final demo preparation 18:30 — Welcome & learn what's new in Codex 19:00 — Project demos and Q&A 20:30 — Winners announced, celebrate with snacks and drinks 🤩 22:00 — Event ends When Online kickoff: Saturday, 24 October 2026 at 10:00 AM, Paris time Online build phase: 24–26 October 2026 In-person finale: Monday, 26 October · 18:00–22:00, Paris time The date and time at the top of this page refer to the in-person finale. Our host, Hexa, is a startup studio, partnering with founders to build ambitious companies from day zero. This community-led hackathon is separate from the official DevDay Exchange in Paris on 28 October. Registration does not include admission to the official event.