We’re opening this thread to share updates on the Arbitrum Day - Brazil Chapter, an initiative supported by the Arbitrum DAO via Domain Allocator.
This event will be a full-day Arbitrum event on November 9 within ETH Latam São Paulo 2025. We’d love to collaborate with the Arbitrum community to create it.
About ETH Latam
ETH Latam is a nonprofit initiative focused on strengthening the Ethereum ecosystem in Latin America through regional gatherings, open education, and collaborative ecosystem-building.
The event is organized by ETH Kipu, with the support of many local contributors. For this edition, we’re proud to count on a strategic partnership with ETH Samba. This group is leading the design and execution of the hackathon.
Previous editions of ETH Latam took place in Buenos Aires, Bogotá, and San Pedro Sula. This will be our fourth edition.
Arbitrum Day - Brazil Chapter at ETH Latam São Paulo 2025
Arbitrum Day will be held on November 9 in São Paulo. The goal is to connect Arbitrum with Brazil’s fast-growing momentum in RWA, tokenization, and stablecoin infrastructure.
The program will feature:
- Panels and talks about Arbitrum
- Presentations from builders leveraging Arbitrum in Latin America
- Strategic dialogues around compliance, real-world assets, and public infrastructure
- Pitch from the builders who worked on Arbitrum during the hackathon
This will be a space to showcase how Arbitrum can power real-world solutions in Latin America’s largest economy and how the community can grow locally with long-term impact.
Why Brazil? 
Brazil is not only the largest economy in Latin America but also a growing hub for real-world blockchain experimentation, institutional adoption, and on-chain infrastructure development. For Arbitrum, this presents a strategic opportunity to deepen its presence, support emerging use cases, and contribute to a vibrant, rapidly evolving ecosystem.
Source.
Some signals that illustrate Brazil’s momentum:
Rayls + Arbitrum Integration
Rayls, an infrastructure initiative born in Brazil, is being developed by Parfin, a key technology partner to the Central Bank of Brazil on digital asset security. In early 2025, it was announced that Rayls will integrate with Arbitrum, using it as the public aggregator network for various subnets already deployed in initiatives like Drex (Brazil’s CBDC infrastructure) → Source
“We chose Arbitrum because it’s the most established player in the L2 space. The code is clean and lightweight, the block time is fast, and the team is highly engaged — we even got to meet CEO Steven Goldfeder,” said Alex Buelau, CPTO and co-founder of Parfin.
Rayls is also the base layer powering the Nuclea Chain, a new digital assets initiative by Núclea, Brazil’s leading digital infrastructure operator.
Núclea: Scaling Transaction Infrastructure into Digital Assets
With over 20 years of experience, Núclea currently handles:
- 90% of card transactions in the country
- 29 billion transactions processed in 2023, totaling over R$18 trillion
Now, the company is extending its infrastructure expertise to the digital economy, leading blockchain initiatives like Drex and Real Digital. → More on Nuclea Chain
Mercado Bitcoin + Plume: $40M in Tokenized RWAs
Brazil’s largest crypto exchange, Mercado Bitcoin, has partnered with Plume Network to tokenize $40 million in RWAs, creating a direct onchain bridge between global capital and yield-generating opportunities in Brazil. → Read the full announcement
Institutional Maturity and National Mapping
Brazil has also launched the Federal Blockchain Observatory, mapping hundreds of blockchain and crypto-related initiatives nationwide. → Explore the interactive map
Additionally, organizations like ABToken and ABCripto bring together banks, exchanges, fintechs, and startups to advance public-private collaboration.
→ abtoken.com.br
→ abcripto.com.br
Community Growth, Content & Ambassadors
Arbitrum’s presence in Brazil has also grown through grassroots efforts. With the leadership of @JoaoKury as LatAm Community Lead and a network of 60+ ambassadors, the ecosystem has seen a surge in localized content production, video creation, and educational resources in Portuguese.
Let’s build together!!!
We’ll use this thread to share ongoing updates as we move forward.
We also invite you to collaborate by suggesting speakers, contributing to the agenda, or simply spreading the word.
Feel free to propose your talk, workshop, or panel related to Arbitrum here: https://forms.gle/nMzCFCwpjx21KvyQ6
Thanks again to the Arbitrum DAO and the Domain Allocators for your support.
We’re looking forward to co-creating something meaningful with you all.
Feel free to DM me on Telegram @Cryptochica_arg
Venue reserved: The Auditório Modular at the State Innovation Center (São Paulo) is confirmed for November 9, with 12-hour exclusive access, basic A/V infrastructure, cleaning, and support services.
About the Venue: State Innovation Center
About the Auditório Modular
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