Building better quality cadastral data on all of Italy for a client, pretty fun postgis work. Fuzzy string matching of government records, OSM, proprietary data and aerial remote sensing data ran through an ML pipeline.

Working on migration from Modal to a single nvidia jetson, to do low-cost monitoring of toxic emissions at the local tata steel plant. Ran this pro bono for the last 2 years, the fun is in getting this as cheap as possible but still with good accuracy

Building a SSTV ios app - you can encode images in sound and transmit these over (ham) radio. The ISS regularly broadcasts these too. And building a multi-user IRC-like chatroom over audio. Hook up your mac or ipad to a voice radio channel, and chat over very slow (31 baud) but very resilient links.