What I build
Tools for messy operational work
Most of my work is about making complicated processes easier to inspect: evidence, edge cases, review decisions, and the interfaces people use to move from uncertainty to action.
About
A working map
I am Ethan, also Jianxu Pan, a founding engineer at Pax AI. I work on product infrastructure for duty drawback: trade data, customs rules, review flows, and the software that makes the work easier to trust.
What I know from the inside
Software inside real operational domains
I spend time around duty drawback, tariff refunds, manufacturing records, customs broker workflows, and the small details that decide whether software is actually useful.
What belongs here
Apps, notes, and durable traces
This site is for artifacts that explain how I think: small tools, practical essays, experiments, and notes from the build. The biography is here only as context for the work.
Read the notes