B2B POS & Inventory System Development

Job Title Full-Stack (React & Node.js) Developer for Single-Vendor B2B POS/Inventory System (Web + Mobile) Project Overview I am seeking a Full-Stack Developer who is proficient with React (web) + React Native (or similar) for mobile, and Node.js (Express/Mongoose) on the backend. The goal is to build a Single-Vendor B2B system that supports POS (point of sale), inventory management, product variations, barcode scanning, and includes both a web application and a mobile app. Key Points Single Vendor, B2B environment (one seller, dealing with multiple wholesale/bulk buyers or retail buyers). Multi-user roles: Admin, Manager, Salesman, Accounts, etc. Product Variations: Support variant attributes (size, color, style, etc.) and track stock separately. Barcode Scanning in the POS for quick billing. Web & Mobile app frontends: Web App with React (suitable for desktop usage). Mobile App (preferably React Native) for on-the-go or in-store usage, scanning, quick orders, etc. Core Functionalities User Authentication & Roles JWT-based auth. Role-based permissions for different panels (Admin, Manager, Sales, Accounts). Product & Category Management (with Variations) CRUD for products (product code, barcode, price, stock, images, etc.). Variations: Size/Color/Style, each variation has unique stock/tracking. Category hierarchy (main, sub, sub-sub). POS/Billing (Barcode Scanning) Quickly add products/variations via barcode scanning. Cart, discount, tax, total, finalize order. Payment status: paid, partial, credit, etc. Optionally print or generate PDF receipts. Inventory & Stock Control Auto-update stock upon completed orders. Variation-level stock management (e.g. T-Shirt: 5 colors, each color/size combo track stock). Low-stock alerts, minStock settings. Customer & Supplier Management Single-vendor focus means we only manage one “store” entity, but multiple customers (B2B clients). If relevant, track suppliers for restocking items. Store addresses, phone, GST/PAN if in India. Financials & Ledger Record transactions (credit/debit). View outstanding balances for customers or suppliers. Payment logs, partial payments, aging analysis. Reporting & Analytics Summaries of daily sales, top products/variations, total revenue, etc. Possibly export CSV or PDF reports. Real-time dashboards for manager/admin. Mobile App React Native or another cross-platform solution. Should allow scanning barcodes (camera-based or hardware scanning) for quick additions. Basic offline capability for sales if feasible (optional). Synchronize data with the backend (orders, products, stock). Web App React-based admin/management interface for product set-up, user management, orders, analytics, etc. Possibly separate “Sales” front end if needed. Single-Vendor B2B Focus Possibly handle bulk orders, special B2B pricing, or customer-specific pricing. Payment terms (credit limit, net30, net60) for B2B customers if relevant. Scope of Work Frontend Development React (web) for manager/admin panel, dashboards, product management, etc. React Native (mobile) or similar, focusing on a user-friendly POS interface with barcode scanning. Backend Development Node.js + Express + Mongoose, defining schemas for products (with variations), orders, users, etc. Secure routes with JWT and role checks. Endpoints for variations: create, update, track stock at variant level. Database MongoDB with Mongoose. Sane indexing for searching products by code/barcode. Possibly aggregated queries for inventory or analytics. Deployment & Maintenance Provide instruction for building/deploying both web & mobile (Android/iOS BOTH possibly ). Minimal CI/CD pipeline or Docker setup is a plus. Budget & Timeline Budget: I’m aiming for ₹20,000 (INR) as a ballpark for the combined web+mobile solution. Timeline: Approx. 3–4 weeks to get an MVP. Open to discussion if additional time is required for full QA or advanced features.