Kalle Rosenbaum
Bitcoin Developer & Author, Popeller · Sweden
Kalle Rosenbaum is a Swedish Bitcoin developer, educator, and the author of Grokking Bitcoin (Manning, 2019), a widely used technical guide to how Bitcoin works. He founded the Bitcoin consultancy Popeller in 2015, authored BIP 120 and BIP 121 (Proof of Payment), and co-wrote Bitcoin Development Philosophy with Linnéa Rosenbaum. He writes and speaks on Bitcoin protocol internals, from block propagation and IBLT to Schnorr signatures and soft fork deployment.
At BTCHEL 2026
- How does Bitcoin actually resist censorship? — Day 1, 12:30, OG stage
- Where is Bitcoin development heading? — Day 2, 12:30, OG stage
https://x.com/kallerosenbaum · https://njump.me/npub1g9ym6t98cz9tvvsac865zak83txjjhd2yqcdegzwsqg2mxfww9xs8fy05t