A closed-loop wallet built for community networks — nature schools, pesantren, cooperatives. I signed up to build the transaction API; ended up building the web dashboard too. Started in 2020 and kept growing from there: PPOB bill payments, transfers, wallet-to-wallet.
Started life as PayAja Bisnis, connecting the wallet to MiniATM devices, then grew into its own EDC platform. Faster server-side processing, tighter security on every transaction that passes through a device.
An internal engine that schedules and runs thousands of transaction jobs a day across our payment device network, so operations no longer do it by hand.
Maintained the integration that handles national electricity payments. Uptime work: unglamorous on a good day, which is exactly the point.