
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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