OneSync

OneSync is a mobile-based digital POS system designed to streamline cafeteria operations by replacing manual order handling with RFID, real-time inventory tracking, and sales analytics. The system enables vendors to manage transactions efficiently while gaining insights into sales trends for better decision-making.

Many small-to-medium cafeteria vendors rely on manual processes for daily operations, which introduce several challenges:

• Manual ordering and cash-based payments

  slow down food service and create issues 
with providing exact change during peak hours

• Inconsistent inventory tracking

  leads to overstocking, stock shortages, and food waste

• Limited visibility into sales performance

  prevents vendors from understanding demand patterns and planning effectively

These challenges result in operational inefficiencies, longer service times, and a lack of data-driven decision-making.

To address these challenges, we developed OneSync, a centralized digital POS system designed to digitize cafeteria operations and improve transaction efficiency.

The System:

• Supports RFID-based cashless payments with real-time order processing

• Provides vendors with a management dashboard for monitoring inventory levels and sales performance

• Generates basic sales forecasts using historical transaction data

• Allows vendors to customize menus, pricing, and item availability for customers

OneSync was built as a mobile-first application, enabling vendors to manage daily operations through a single, accessible platform.

OneSync was implemented as a mobile-first digital POS system with a focus on reliability, real-time data handling, and secure transactions.

• Built a cross-platform mobile POS application using Flutter, focusing on real-time order and inventory updates.

• Implemented Firebase Authentication and real-time database synchronization

  to ensure secure access and consistent transaction data

• Developed a Node.js backend to handle core business logic, including CRUD operations for orders, inventory, and sales records.

• Applied AES-based encryption was applied to securely manage customer digital balances and transaction data.

• Reduced reliance on manual order and payment handling by centralizing transactions into a single digital POS system.

• Improved checkout efficiency through RFID-based cashless payments and real-time transaction processing.

• Enabled real-time visibility into inventory and sales performance, helping vendors make more informed operational and restocking decisions.

• Managing real-time data synchronization while maintaining data consistency across transactions, inventory, and user sessions.

• Integrating hardware-based payment inputs with a cloud-backed, cross-platform mobile application, ensuring reliable communication between RFID components and the system backend.

• Transforming raw transaction data into meaningful sales insights, requiring careful data structuring and aggregation.

This project strengthened my understanding of full-stack development, real-time system design, and end-to-end integration between hardware, mobile applications, and cloud services to solve real-world operational problems.