CONTEXT
Built for street vendors and small merchants to run fast sales in low-connectivity environments. Traditional paper logs cause queues and lost records during peak hours.
02 / PRODUCT
PROJECT OVERVIEW
Technical highlights
A practical sales and checkout management system built for dynamic physical locations and event operations. Replaces manual records with a fast PWA featuring products, cart, payment methods, sales history, reports, CSV export, and cloud sync.
- Installable app
- PWA
- Local-first sales flow
- Offline
- Exportable reports
- CSV
- Orders per event day
- 100+
- Concurrent users at the time
- 5
Mobile experience
Built for the point of sale
Demonstration screens showing the complete flow from order entry to daily reporting.
CASE STUDY
From context to outcome
TECHNICAL DECISIONS
Offline-First Architecture
Sales logging, inventory updates, and cash register operations work without internet. Data persists locally via IndexedDB.
Resilient Synchronization
Sync queue with automatic retry detects connection recovery and merges data without blocking transactions.
High-Speed Interface
Touch layout optimized for basic smartphones, featuring large hit targets, preset amounts, and auto change calculation.
RESULTS
Built for a specific fair operation and used during event days by approximately five people at the same time. It supported more than 100 orders per event day, replacing manual notes and simplifying order registration and end-of-day reporting. It is no longer in active use today.