A white flag icon over code braces.
B4OSb4oschaincodeboss-challenge

A technical challenge with real opportunities: the ₿OSS Challenge via B4OS

Learn Bitcoin by coding and get into open source with the ₿OSS Challenge via B4OS. Community, mentorship and real opportunities for developers.

Diana ·

If you’re a developer, you’re not afraid of challenges, you enjoy learning by solving real problems and you’re interested in getting into the world of Bitcoin, this message is for you. The ₿OSS Challenge is a technical challenge, demanding and fun, designed for those who want to learn Bitcoin by programming and show what they’re made of.

The challenge is run by Chaincode Labs and lasts up to 3 months, with progressive programming challenges and a system that opens doors for those who commit seriously.

But the key difference isn’t just the challenge itself, it’s how you go through it.

Why apply to the ₿OSS Challenge via B4OS and Librería de Satoshi?

Applying to the ₿OSS Challenge with Librería de Satoshi and B4OS means taking on the challenge with the Spanish-speaking community, mentorship and unique opportunities. This is where the challenge becomes clearer, with less friction and more benefits. Your opportunity starts here: b4os.dev/chaincode-boss/

Benefits for everyone who signs up with B4OS

From the start you’ll have access to:

  • Support on Discord to resolve all your technical and process questions.
  • A Spanish-speaking community and networking with Bitcoin Open Source grantees.
  • Study groups, to learn together and keep up the pace.
  • Mentorship, with people who have already walked this path.
  • Classes and study groups suited to your level.

It’s not just about solving challenges, but about learning better through the community and technical conversations with devs from around the world.

Benefits for developers who stand out

The developers with the best Proof of Work will be able to access:

  • In-person residencies in Florianópolis, Brazil; Valencia, Spain; and Mexico City
  • Sponsorship to attend conferences in different parts of the world.
  • English and Portuguese classes.
  • And more opportunities that open up based on performance in the ecosystem.

Alumni from previous B4OS editions are contributors to Bitcoin Core, Lightning, LDK Lightning Dev Kit, BDK, Silent Payments, Mostro, White Noise, among others.

How does the journey work?

  • Month 1: You learn Bitcoin by solving programming challenges created by Chaincode (≈10 hours per week), with support from the B4OS and Librería de Satoshi community.
  • Month 2: Depending on your performance, you start contributing to ₿OSS projects or go deeper with courses and study groups. Developers are selected from both paths for micro-grants and grants.
  • Month 3: Based on your Proof of Work, you’re connected with projects in the ecosystem to keep growing as an open-source contributor.

Key dates

  • Applications open: now
  • Deadline: December 31
  • Program start: January 12

Apply here: https://b4os.dev/chaincode-boss/

Bitcoin is being built right now. And it’s waiting for your talent.