Offline-First Retail POS & Inventory Solution
Budget: $30 – $250 SGD
Professional Project Specification: Offline-First Retail POS & Inventory
Project Title: Development of an Offline-First POS & Inventory Management System (Cross-
Platform)
1. Project Overview
We are seeking a high-caliber developer or agency to build a robust, Offline-First Point of Sale
(POS) and Inventory Management System. The application must serve diverse retail
environments including supermarkets (high-volume scanning), boutiques (variants/sizes), and
general retail shops.
The critical success factor is the system's ability to perform 100% of sales and inventory tasks
without an internet connection, with seamless background synchronization to a cloud-based
administrative dashboard once connectivity is restored.
2. Core Feature Modules
A. Point of Sale (Terminal Interface)
●
High-Speed Checkout: Optimized for both touchscreens and keyboard/mouse
setups.
●
Offline Operation: Full capability to process sales, search products, and apply
●
●
discounts while offline.
Peripheral Integration: Native support for ESC/POS thermal printers, barcode
scanners, and electronic cash drawers.
Multi-Payment Support: Split payments between cash, card, and mobile
wallets.
●
Held/Parked Orders: Ability to save a cart and resume it later (useful for busy
supermarket queues).
B. Advanced Inventory Management
●
SKU & Variant Management: Support for "Parent" products with variants (e.g.,
Shirt -> Small, Medium, Large; Red, Blue).
●
Stock Tracking: Real-time local stock deductions and low-stock threshold
notifications.
●
Batch & Expiry Tracking: (Essential for supermarkets) tracking items by shelf
life.
●
Barcode Generation: Ability to generate and print labels for unbranded items.
C. Data Synchronization & Security
●
Bi-Directional Sync: Local-to-Cloud (sales, logs) and Cloud-to-Local (new
products, price changes).
●
Conflict Resolution: Automated logic to handle data discrepancies between
multiple offline terminals.
●
Role-Based Access Control (RBAC): Distinct permissions for Cashiers, Store
Managers, and Super-Admins.
●
Local Encryption: Encrypted local database to protect sensitive business data.
D. Reporting & Back-Office
●
●
Automated EOD: End-of-day (X/Z) reports generated locally.
Cloud Dashboard: Centralized web view for owners to monitor multiple
branches.
●
Exporting: One-click exports for accounting (CSV, Excel, PDF).
3. Technical Requirements
●
●
●
●
Architecture: Offline-first using a local database (e.g., SQLite, Realm, or
PouchDB).
Front-End: Modern, responsive framework (e.g., React/Electron, Flutter, or .NET
MAUI).
Back-End (Cloud): Secure API (Node.js, Python, or Go) with a robust database
(PostgreSQL/MongoDB).
Hardware Compatibility: Standard Windows/Android drivers for retail
peripherals.
4. Deliverables
●
●
●
●
Fully Functional Application: Compiled installer for the target OS (Windows/
Android/macOS).
Admin Web Portal: For remote management and analytics.
Source Code: Well-documented code hosted on a private repository (GitHub/
GitLab).
User Manual: Brief documentation for staff training and system setup.
Project Title: Development of an Offline-First POS & Inventory Management System (Cross-
Platform)
1. Project Overview
We are seeking a high-caliber developer or agency to build a robust, Offline-First Point of Sale
(POS) and Inventory Management System. The application must serve diverse retail
environments including supermarkets (high-volume scanning), boutiques (variants/sizes), and
general retail shops.
The critical success factor is the system's ability to perform 100% of sales and inventory tasks
without an internet connection, with seamless background synchronization to a cloud-based
administrative dashboard once connectivity is restored.
2. Core Feature Modules
A. Point of Sale (Terminal Interface)
●
High-Speed Checkout: Optimized for both touchscreens and keyboard/mouse
setups.
●
Offline Operation: Full capability to process sales, search products, and apply
●
●
discounts while offline.
Peripheral Integration: Native support for ESC/POS thermal printers, barcode
scanners, and electronic cash drawers.
Multi-Payment Support: Split payments between cash, card, and mobile
wallets.
●
Held/Parked Orders: Ability to save a cart and resume it later (useful for busy
supermarket queues).
B. Advanced Inventory Management
●
SKU & Variant Management: Support for "Parent" products with variants (e.g.,
Shirt -> Small, Medium, Large; Red, Blue).
●
Stock Tracking: Real-time local stock deductions and low-stock threshold
notifications.
●
Batch & Expiry Tracking: (Essential for supermarkets) tracking items by shelf
life.
●
Barcode Generation: Ability to generate and print labels for unbranded items.
C. Data Synchronization & Security
●
Bi-Directional Sync: Local-to-Cloud (sales, logs) and Cloud-to-Local (new
products, price changes).
●
Conflict Resolution: Automated logic to handle data discrepancies between
multiple offline terminals.
●
Role-Based Access Control (RBAC): Distinct permissions for Cashiers, Store
Managers, and Super-Admins.
●
Local Encryption: Encrypted local database to protect sensitive business data.
D. Reporting & Back-Office
●
●
Automated EOD: End-of-day (X/Z) reports generated locally.
Cloud Dashboard: Centralized web view for owners to monitor multiple
branches.
●
Exporting: One-click exports for accounting (CSV, Excel, PDF).
3. Technical Requirements
●
●
●
●
Architecture: Offline-first using a local database (e.g., SQLite, Realm, or
PouchDB).
Front-End: Modern, responsive framework (e.g., React/Electron, Flutter, or .NET
MAUI).
Back-End (Cloud): Secure API (Node.js, Python, or Go) with a robust database
(PostgreSQL/MongoDB).
Hardware Compatibility: Standard Windows/Android drivers for retail
peripherals.
4. Deliverables
●
●
●
●
Fully Functional Application: Compiled installer for the target OS (Windows/
Android/macOS).
Admin Web Portal: For remote management and analytics.
Source Code: Well-documented code hosted on a private repository (GitHub/
GitLab).
User Manual: Brief documentation for staff training and system setup.