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WASAC & REG Unified Billing
Enterprise Java Billing Backend
Problem
Water and electricity postpaid billing required automated unified invoicing across WASAC and REG systems.
What I Built
Spring Boot services for billing logic, customer accounts, invoice generation, and unified postpaid workflows.
Tech Stack
Java
Spring Boot
REST API
MySQL
Enterprise
Outcome
Unified billing automation replacing manual cross-utility reconciliation.
Results
- Unified WASAC/REG billing
- Spring Boot backend
- Automated postpaid flows