Offline-First SME Operations Suite

What this system solves

KioskFlow lets a small business continue recording sales and protecting inventory when connectivity is unreliable. A valid transaction is saved on the device first, clearly marked for synchronization and safely replayed when connectivity returns.

Small businesses, field teams and product teams serving users who cannot assume continuous, affordable connectivity.

My role

I designed the offline transaction boundary, IndexedDB model, synchronization outbox, conflict workflow, service-worker cache, operational interface and unit-tested policies.

Capabilities demonstrated

• Installable progressive web application
• IndexedDB persistence for orders and inventory
• Local stock validation
• Durable synchronization outbox
• Visible online, offline and synchronization states
• Explicit conflict resolution and JSON reporting

System flow

Important decisions

Local confirmation is treated as a real state, not disguised as a completed server write. Business data and synchronization intent remain inspectable, and concurrent versions become explicit conflicts instead of silent overwrites.

Beyond the happy path

The service worker keeps the application shell available while IndexedDB preserves business records across refreshes. Queue state and conflicts remain visible to the operator.

Testing and evidence

Unit tests cover stock transitions and conflict policies. The interface uses synthetic inventory and server acknowledgements.

Current limitations

Production extension path

A production version would add organization identity, device registration, encrypted sensitive fields, idempotent sync endpoints, delta synchronization, tombstones and queue monitoring.

Tools and concepts