Case Studies
01National Digital ID↗Citizens prove one fact, never the whole document.02Property Registry↗Five system steps became three human ones.03Sign AI↗An AI that would rather say “I don’t know”.04Keylys↗What needs you first, then what you own.05Orange Dynasty↗From a bot-filled feed to a wallet and an ID.06EthSign↗Send to anyone, keep contracts private.
I'm Cathy Xu, a product designer with 5 years at , which builds digital ID and money systems for governments. I take trust‑critical identity, fintech and AI products from 0 to 1.
Case Studies
- 012026National Digital IDA national digital ID where citizens prove one fact, without handing over the whole document.
- 022026Property RegistryAsked to refresh a property registry, I rebuilt the flow around what people do. Five system steps became three.
- 032026Sign AIA public-service AI assistant that says only what its source allows, with a dashboard for each department.
- 042026KeylysA private-wealth app that shows clients what needs them first, and says how current every number is.
- 05LiveOrange DynastyA community app bots took over, rebuilt around a wallet and a Citizen ID.400K+joined in 14 days (2025 launch)
- 06LiveEthSignAn e-signature product rebuilt so senders can reach anyone and keep contracts private.180K+signatures on v4.1 (Apr 2023)
More work
- TokenTable↗A suite of onchain token distribution products. 200+ projects and 40M+ addresses.Launched · 2024
- Sign Protocol + SignScan↗The attestation system of Sign’s identity building block. 53,306 people in 128 countries used it in the launch weeks.Launched · 2024