B4OS — Impact

Alumni Network

B4OS graduates are active contributors at the most relevant organizations in the global Bitcoin open source ecosystem.

47+ B4OS graduates
12 Countries represented
180+ Merged PRs
$2.1M In post-program grants

Where our graduates work

Spiral (Block)

Grant recipient / LDK contributor

Lightning Labs

Core developer

Chaincode Labs

Resident / Bitcoin Core contributor

Braiins

Protocol engineer

Bitcoin Core

Active contributor

Librería de Satoshi

B4OS mentor next cohort

Testimonials

What our graduates say

B4OS

"B4OS gave me structure, mentorship and time to become an active Bitcoin Core contributor. I have four merged PRs and work full time in the ecosystem today—it would not have happened without the program."

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Ana García

Bitcoin Core Contributor — B4OS Cohort 3 Alumni

Ambassador

"Thanks to the Ambassador program I organized my city’s first Bitcoin meetup. Today we have an active community of 200 people and several are studying in B4OS. The multiplier effect is real."

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Carlos Mendoza

Bitcoin Ambassador in Peru — Ambassador Alumni

LN & AI

"The LN & AI program exposed me to technologies I could not find anywhere else. I built my first autonomous payment agent in week three and now work at an agentic payments startup in Miami."

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María Torres

LN & AI Developer — LN & AI Program Alumni

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