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
The ASmap dashboard is live
Summer of Bitcoin final report: the ASmap dashboard now updates itself and lives at dashboard.asmap.org.
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.
Measuring ASmap and Learning How Fragile Open Source Really Is
Summer of Bitcoin midterm: a first public dashboard for aging ASmaps, and what happened when bitnodes.io went offline.