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.

• Manual, cash-based ordering slowed service and caused issues making exact change during peak hours

• Inconsistent inventory tracking led to overstocking, shortages, and food waste

• No visibility into sales performance, making demand planning guesswork

Built OneSync, a centralized POS system with RFID-based cashless payments and real-time order processing. Vendors get a dashboard for inventory and sales monitoring, basic sales forecasting from historical transaction data, and the ability to customize menus and pricing — all through a mobile-first app.

• Built the cross-platform mobile app in Flutter, prioritizing real-time order/inventory sync

• Used Firebase Authentication and real-time database sync for secure, consistent transaction data across sessions

• Built the backend in Node.js to handle order, inventory, and sales CRUD logic

• Used AES-based encryption to secure customer digital balances and transaction data
  

• Hardest problem:

  keeping RFID hardware input reliably synced with a cloud-backed mobile app in real time, while making sure raw transaction data stayed consistent enough to turn into usable sales insights

• Replaced manual cash handling with centralized digital transactions

• Cut checkout time via RFID-based cashless payments

• Gave vendors real-time inventory and sales visibility to inform restocking decisions