The Arbitrum Open House Dubai Buildathon is an hackathon running from October 31 to December 6, 2026, organized by the Arbitrum ecosystem. It invites developers, creators, and founders to build on Arbitrum’s Layer 2 infrastructure. Participants can build using Stylus or Solidity and deploy on Arbitrum One or an Orbit chain. The hackathon covers categories including DeFi, gaming, social tools, and other onchain applications. A total of $30,000 in rewards is available. The program gives builders exposure to the Arbitrum ecosystem and connects them with regional leaders and a global network of builders. Participants may bring an existing product or start from scratch, with no restrictions.