The next chapter of Arbitrum’s global builder journey arrives in New York City. Join a vibrant community of developers, founders, and innovators building the future of on-chain applications. Register now to take part in the Open House NYC Buildathon — learn, build, and showcase your project for a chance to join the global stage.


3 Week Buildathon

Join Our Founder House

Integrated Learning Experience in the Buildathon

Announcing Soon

Global Network, Local Energy

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