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LONDON
Arbitrum Open House
Arbitrum Open House london
The next chapter of Arbitrum’s global builder journey arrives in London. 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 London Buildathon — learn, build, and showcase your project for a chance to join the global stage.
Why Open House Build
Learn Fast, Build Faster
Integrated Learning Experience in the Buildathon
Buildathon Prize
Announcing Soon
Build for London
Global Network, Local Energy
IRL Founder House
Win Your Spot
Why Open House Build
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