A. SYSTEM OVERVIEW I am Building is a hybrid offline-first business operating system designed for Pakistani retail businesses including pharmacies, grocery stores, garment stores, and chains. The system must function without internet, while syncing with cloud services when available. ________________________________________ B. CORE ARCHITECTURE (MANDATORY) • Windows Desktop POS Application • Offline-first architecture • Local database as primary source of truth • Background cloud sync (when internet is available) • Encrypted local + cloud backups • Modular architecture for future expansion ________________________________________ C. POS & SALES MODULE • Ultra-fast billing screen • Keyboard shortcuts • Barcode scanner support • Manual product search • Hold / resume carts • Split payments (cash, card, wallet) • Snapshot pricing (price changes don’t affect old bills) • Refunds and returns • Urdu + English UI • Dark mode / light mode • Multi-currency (PKR default) ________________________________________ D. INVENTORY MANAGEMENT • Stock in / stock out • Batch-wise inventory (important for pharmacy) • Expiry date tracking • Expiry alerts (30, 15, 7 days) • Low stock alerts • Variants (size, pack, unit) • Stock transfer between branches • Manual and bulk inventory updates • Inventory valuation reports ________________________________________ E. PHARMACY-SPECIFIC FEATURES • Medicine batch tracking • Expiry-based selling priority • Loss prevention alerts • Controlled medicine flags • Expiry loss reports ________________________________________ F. SUPPLIER & PURCHASE MODULE • Supplier database • Purchase orders • Auto reorder suggestions • Supplier-wise purchase history • Supplier WhatsApp / email integration • Cost price tracking ________________________________________ G. CUSTOMER & LOYALTY (CRM) • Customer database • Purchase history • Loyalty points • Buy X get Y offers • Birthday discounts • WhatsApp invoice & promotions • Khata / credit (udhaar) system • Due reminders ________________________________________ H. PAYMENTS & FINTECH • Cash payments • JazzCash integration • Easypaisa integration • Card payments • Split payments • Payment reconciliation • POS-linked QR codes • Daily cash closing reports ________________________________________ I. REPORTS & ACCOUNTING • Daily sales report • Monthly sales report • Profit & Loss • Expense tracking • Tax reports • FBR-compliant export formats • Audit logs • Accountant export dashboards ________________________________________ J. HR & STAFF MANAGEMENT • Staff roles & permissions • Attendance (PIN / biometric optional) • Shift tracking • Salary calculation • Commission calculation • Payroll reports ________________________________________ K. MULTI-BRANCH & CLOUD DASHBOARD • Central owner dashboard • Live sales monitoring • Multi-branch inventory view • Central reporting • Remote access via cloud app ________________________________________ L. MOBILE APPLICATIONS 1. Owner App • Live sales • Alerts • Reports • Notifications 2. Stock-Taker App • Barcode scanning via camera • Voice-based quantity input • Instant sync with main POS ________________________________________ M. WHATSAPP & AUTOMATION • WhatsApp Business API integration • Invoice sending • Stock inquiry bot • Order confirmations • Customer notifications ________________________________________ N. INTELLIGENCE & SMART FEATURES • Demand forecasting • Reorder recommendations • Slow-moving stock detection • Expiry loss prediction • Sales trend analysis (Heuristic-based first, ML-ready) ________________________________________ O. MIGRATION TOOLS (CRITICAL) • One-click Abuzer data import • Support CSV, SQL, backup files • Inventory, customers, suppliers, sales migration • Data validation & rollback ________________________________________ P. SECURITY & RELIABILITY • Encrypted local database • Encrypted cloud sync • Role-based access • Audit logs • Automatic backups • Restore tools • Power failure recovery ________________________________________ Q. TECH STACK (PREFERRED) • Desktop: Python (PyQt) or C# (.NET) • Database: SQLite (local), PostgreSQL/MySQL (cloud) • Mobile: Android • Cloud: REST APIs • WhatsApp: Official API • Payments: Official APIs ________________________________________ R. DELIVERABLES • Full working system • Desktop application • Mobile apps • Cloud backend • Source code • Documentation • Deployment guides Rest All Features of a POS system. MUST READ: WRITE POS ABOVE YOUR GREETINGS AND EVERYTHING. ONLY BID THE RIGHT PRICE, NO ADDITION TO YOUR BID PRICE LATER. BUDGET IS STRICT UNDER 250 USD. LATER FULLTIME OPPORTUNITY SHOW YOUR RELEVANT PORTFOLIO NO AI WORK AND PROPOSAL WILL BE EXCPETED.