I'm Joris
I’m a software developer and Master student in Germany. I work on Bitcoin network-layer tooling: measuring how the P2P network looks from DNS seeders, crawlers, and ASmap data, and feeding what I find back into open-source projects like kartograf and asmap-data.
This site is a working journal.
Latest Posts
How a collaborative asmap-data launch works
Notes from the bitcoin-core/asmap-data launches: why everyone starts kartograf at the same second, and how matching works.
ASMap Dashboard
A visual history of Bitcoin Core's ASmap builds, scored against the live network. Summer of Bitcoin 2026, mentored by fjahr.