Engineering
How we built offline-first proof-of-delivery for Fauward Go operators in low-connectivity zones
Offline-first proof-of-delivery was built to handle the reality of low-connectivity routes, where signatures, photos, and status updates need to survive poor signal without duplicating or losing events.
Design constraints
Driver apps in the field cannot depend on continuous connectivity. A single failed upload cannot block collection of a signature, delivery note, or exception reason.
The sync system therefore treats the device as a temporary source of truth and moves data back to the platform only when the network can confirm receipt safely.
- Local queueing for proof-of-delivery events
- Retry-safe uploads with idempotent handoff patterns
- State reconciliation when a device reconnects after long gaps
How sync works in practice
Each field event is captured locally with the shipment context needed to replay it later. Once connectivity returns, the client flushes queued actions in order and confirms which items the backend has accepted.
This approach protects operators from the two worst outcomes in low-connectivity zones: missing proof and duplicate proof.
Why it matters commercially
Reliable proof-of-delivery is not only an engineering concern. It affects invoice timing, dispute resolution, and customer confidence in the service.
By making offline capture dependable, Fauward reduces the gap between a driver completing work on the road and the business being able to act on that completion centrally.