Offline-first field service app
Technician app for inspections in low-connectivity sites, with conflict-free sync and photo evidence capture.
Industry
Energy services, EU
Year
2025
Stack
- React Native
- Expo
- WatermelonDB
- Node
- Postgres
01Problem
Technicians logged inspections on paper and re-keyed them at the depot. Data arrived late, incomplete, and without evidence.
02Approach
- 01
Designed a local-first data model with deterministic conflict resolution.
- 02
Built guided inspection flows that work fully offline, including annotated photo capture.
- 03
Implemented background sync with retry budgets tuned for satellite uplinks.
- 04
Delivered a supervisor web view for scheduling and QA.
03Outcome
- Inspection data available to the office the same day instead of the next week.
- Photo evidence attached to every non-conformance report.
- Single codebase shipped to both stores with staged rollouts.
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