Hackathon
Open
Arbitrum Open House São Paulo: Online Buildathon 2027
The Arbitrum Foundation offers 115,000 USD in prizes and grants in an online buildathon for Arbitrum projects. Submissions close March 1, 2027.
| Detail | Value |
|---|---|
| Overall prize | 70,000 USDC; 1st 40,000; 2nd 20,000; 3rd 10,000 |
| Promising Products track | 15,000 USDC; 1st 7,000; 2nd 5,000; 3rd 3,000 |
| Grants | Up to 30,000 USDC in milestone based grants for selected projects; not guaranteed |
| Reserved places | At least 1 of 3 prizes for a project on Robinhood Chain; at least 1 for a project on Arbitrum |
| Judging | Smart contract quality; product market fit; innovation and creativity; real problem solving |
Requirements:
- Extra consideration for projects that integrate the Paxos USDG stablecoin
Timeline:
- Registration from November 2, 2026
- Submission window from February 8, 2027
- Rewards announced March 8, 2027
Source · hackquest.io/hackathons/Arbitrum-Open-House-Sao-Paulo-Online-Buildathon
Published 30 October 2026 · Checked against the organizer's page 8 November 2026
DevGrants Daily, run by Albert Andrejev. How entries are made and checked.
Quick answers
Is there an in person part?
Yes. The top three teams each get a place at a three day Founder House in São Paulo with the Arbitrum technical team and mentors.
Are the prizes paid at once?
No. All prizes are tied to development milestones set out in the terms and conditions.