zonPOS - Smart Queue & Retail POS
High-throughput smart queue management & offline-first cloud point of sale system.
Client / PartnerRushivarya Solutions (Proprietary SaaS Product)
Production PhaseLive / Deployed
Primary Toolchain
Nuxt 4Node.jsFlutter
The Challenge
Retailers and busy clinics face severe customer churn due to long checkout queues, intermittent internet drops halting POS machines, and complex desktop software with expensive licensing costs.
Architecture & Solution
Engineered an offline-first hybrid POS and token queue system. Counters can issue tokens, bill offline via local SQLite cache, auto-sync when online, and stream live queue status to digital token displays and customer WhatsApp handles.
Key Features & Deliverables
Offline-first billing with seamless background sync
Smart Queue & Token management with TV / display board output
Direct WhatsApp & SMS digital receipt transmission
Thermal printer integration (ESC/POS Bluetooth & USB)
Full compliance with India Digital Personal Data Protection (DPDP) Act 2023
Inventory audit alerts and daily sales executive dashboards
Technology Stack
Frontend: Nuxt 4 / Vue 3 with Tailwind CSS for web backoffice
Desktop & Mobile Counter Apps: Flutter cross-platform runtime
Backend Engine: Node.js with Fastify & WebSockets for millisecond-level token broadcast
Database: Local SQLite on edge devices syncing with PostgreSQL cluster
Security: Encrypted JWT sessions, TLS 1.3, granular role-based access
Results & Project Metrics
45%
Queue Wait Reduction
3x Faster
Checkout Speedup
99.98%
Uptime Reliability
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