The hackerhouse for Bitcoin builders in Brazil
Casa21 is a community space in São Paulo dedicated to learning, hacking, and building on Bitcoin. Maintained by Vinteum, it's where developers, educators, and enthusiasts meet in person to collaborate on open-source projects, run workshops, host meetups, and deepen their understanding of Bitcoin and related technologies.
Meet theBuilders
Casa21 is home to a growing community of Bitcoin developers, educators, and builders. Here are some of the people who regularly hack, teach, and collaborate in the space.
Jão Noctus
Engineer at ZBD
Lucas Ferreira
Founder of Vinteum
Pins
Contributor to LND
Leonardo Lima
BDK Maintainer
Joãozinho
Bitcoin Dev Padawan
Hiro
Marketer at Satsconf
João Leal
Contributor to Floresta
TheMhv
Cashu Dev
Thaiz Batista
Head of Operations at Vinteum
Caio Ueda Sampaio (K-YU)
Contributor to Bitcoinfuzz
Any cypherpunk
Work from Casa21
Casa21 is a place to build, work, and spend time with other people working on Bitcoin.
Our coworking space is open to Bitcoin builders of all kinds: open-source contributors, designers, founders, writers, educators, and people helping the ecosystem grow.
If you care about Bitcoin and want to work around others who are in it for the long term, you’re welcome here.
A short description of what you're working on
Your goals and timeline
Two references from people in the community who know your work
We keep the space focused, respectful, and community-driven — and we're excited to welcome builders from all backgrounds and disciplines. Apply by emailing us at info@vinteum.org
What You Get as a Member
Being part of Casa21 means more than just a desk and good Wi-Fi. You join a space shaped by collaboration, curiosity, and real Bitcoin builders.
Co-working space
Reliable internet, a comfortable work setup, and a focused environment
Global connection
Meet visiting contributors from other countries and collaborate across borders
Daily peer interaction
Work side-by-side with Bitcoin devs, designers, educators, and product builders
Podcast studio
Record your Bitcoin content with quality audio and a professional setup
Workshops & study sessions
Access to weekly technical deep-dives, hands-on sessions, and discussion groups
Mentorship & feedback
Get support and guidance from Vinteum's grantees, fellows, and extended network
Priority access to events
Early invites or reserved spots for meetups and workshops
Community meals & hangouts
Sometimes we build. Sometimes we eat. Usually both.
Use of our 60-person auditorium
Host your own Bitcoin events at Casa21 (subject to approval)
Become a Member
Casa21 is designed for builders who believe in open-source, peer learning, and creating in public. If that sounds like you, come hang out.
