* Project Goal Build a SaaS-ready, multi-tenant COD Seller Operating System for GCC online sellers. This is a Lean MVP (30–45 days) focused on operational execution — not a full enterprise SaaS. * Core System Flow Vendor → Product Approval → Inventory → Lead Import → Call Center → Barcode → Delivery → COD → Ledger → Payout → Reporting * Mandatory Architecture Shared DB with strict company_id isolation Role-Based Access Control (RBAC) Ledger-based financial engine (event-driven transactions) Configurable cost engine (no hardcoded logic) Indexed DB for fast filtering * Key Modules (MVP Only) 1 Vendor Product Onboarding Product submission + approval workflow Auto-generated Product Code / Batch ID Warehouse activation + notification 2 Inventory SKU + batch tracking Reserved stock logic Movement logs 3 Lead Import Excel / CSV template Validation (duplicates, stock, product match) Auto assignment to Call Center 4 Call Center Confirm / Cancel / Follow-up Order lifecycle engine 5 Order Barcode & Label Auto barcode/QR generation Printable PDF label (single + bulk) Scannable warehouse flow 6 Delivery Module Internal drivers External courier upload Partial COD support 7 Finance & Ledger Event-based ledger entries Dynamic balance calculation Vendor payout logic Soft-lock after settlement 8 ROI Calculator (Optional) Standalone analytical tool Manual ad spend input CPA / ROI / Net profit calculation * Global Filtering (Critical) System must allow search/filter by: Vendor ID Product Code / Batch Order ID Phone Status Date range Country Exportable results required. * Super Admin Controls User management Dynamic role builder Permission matrix (view / edit / export / delete) Country & warehouse restriction Field-level restrictions Full activity log *** Security Requirements Secure password hashing CSRF protection SQL injection prevention Immutable ledger entries Soft delete only HTTPS enforced Automated backups *** Delivery Requirements 30–45 days Milestone-based payments Weekly progress updates 60 days free bug fixing Cloud deployment (AWS / DigitalOcean) ---- Not Included in MVP Subscription billing Advanced automation AI features Full procurement engine Mobile app * Final Objective Deliver a stable, scalable, COD-first operational system — clean architecture, strong financial logic, and ready for future SaaS expansion.