DIMETRI TPJ
Mobile meter-reading app and Laravel backend for Perumdam Tirta Pandalungan field staff, replacing paper forms with on-site data capture, GPS verification, and anomaly detection.
SIER Sport Arena
Mobile-first sports court booking app for PT Surabaya Industrial Estate Rungkut (SIER), replacing phone-and-WhatsApp reservations with real-time availability and a Flutter Web staff dashboard.
Outcomes
- Replaced phone-and-paper booking workflows with live court availability and digital reservations.
- Built real-time Firestore transaction handling to prevent double bookings across concurrent reservation attempts.
- Delivered a Flutter Web staff dashboard enabling schedule management, maintenance blocks, and QR-code customer check-in within a shared codebase.
- Simplified the booking flow after user testing revealed the first version required too many steps, reducing fallback to phone calls.
