01 /Problem
Pharmacies need every sale fast at the counter, compliant with KRA e-invoicing and reconcilable at shift close — three requirements that usually pull a POS in different directions.
02 /What was built
- Built a receipt engine with sequential invoice numbers and a dual-purpose KRA QR code.
- Supported A4 PDF and 58/80mm thermal receipt formats from the same data.
- Added a live, Socket.IO-driven shift-report view.
- Hardened the application layer with security best practices.
03 /Stack used
04 /Outcome
A POS where compliance, speed and accountability run through one consistent invoicing engine, with real-time shift reporting.