21 in 21: David Gumberg on the Chaincode ₿OSS Challenge and Becoming a Bitcoin Core Contributor

21 in 21: David Gumberg on the Chaincode ₿OSS Challenge and Becoming a Bitcoin Core Contributor

From 21 in 21 by Hosted by Haley Berkoe

December 17, 2025 · 23 min

About this episode

David Gumberg discusses his journey into Bitcoin and contributions to Bitcoin Core.

Haley Berkoe sits down with David Gumberg, a Bitcoin Core contributor at Localhost , a bitcoin-focused research center in the Bay Area. David shares how he got into bitcoin, what pushed him from curiosity to contribution, and how completing the Chaincode ₿OSS Challenge in 2024 helped him make the leap to contributing to Bitcoin Core full time. They also dig into what he’s focused on now in Core: Compact Block Relay, block propagation times, and why improving network latency can make mining more fair for smaller miners. bosschallenge.xyz (applications due Dec 31) github.com/davidgumberg x.com/ChaincodeLabs x.com/lclhostresearch x.com/HBerkoe

People in this episode

Host: Haley Berkoe

Guest: David Gumberg

Topics covered

  • Bitcoin
  • technology
  • network latency
  • block propagation
  • mining
  • contribution

Keywords

  • Bitcoin
  • Core contributor
  • Chaincode ₿OSS Challenge
  • Compact Block Relay
  • network latency
  • mining fairness

Mentioned in this episode

Organizations: Bitcoin Core, Chaincode ₿OSS Challenge, Localhost

Places: Bay Area

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