Hospital Billing Management System (GitHub / Live)

• Designed a six page relational data model and a 16 screen wireframe set for a hospital patient billing workflow

then implemented it across three gated milestones.

• Built staff role based access control, patient and encounter charge capture and immutable invoice snapshots using

Decimal128 for financial precision.

• Integrated SSLCOMMERZ and Bangla QR checkout for partial payments, refunds and reconciliation with

transactional, idempotent payment settlement.

• Added PDF invoice and receipt generation, CSV exports and an audit log covering privileged actions across the

application.