Field Service Mobile App for a National HVAC Network

Technicians worked in basements, plant rooms and remote sites where mobile data was unreliable or absent. Job cards were filled on paper, driven back to branch offices, and re-keyed by admin staff - creating an average nine-day gap between work completed and invoice raised. Nobody could see live job status.

We built an offline-first application with a local database as the primary store and a background sync engine that reconciles with the server whenever a connection appears. Technicians can open job cards, record readings, capture photographs, collect customer signatures and consume spare parts with no connectivity at all.

A conflict-resolution layer handles the case where a job is edited on the server and the device simultaneously. Supervisors get a live map view of technician locations and job progress, and the app pushes completed job data straight into the billing system.