Project Description: We are looking for an experienced development team or individual to design, develop, and deploy a scalable, secure, and high-performance POS & ERP web application for multi-location retail and enterprise operations. The system must support offline-first POS operations, real-time business visibility, and two-way data synchronization between store-level databases and a centralized cloud infrastructure. The platform should be built using a modern microservices architecture and support role-based access, secure authentication, and enterprise-grade performance. Technology Expectations: Frontend: React JS, responsive UI, POS touch optimization Backend: Spring Boot, REST APIs, JWT/OAuth authentication Database: PostgreSQL with centralized cloud + local store DB Architecture: Microservices, online/offline failover, two-way sync, conflict resolution Key Functional Modules: * Sales & POS management * Warehouse & inventory management * CRM & customer lifecycle management * Finance & accounting module * Store operations management * Product & supplier management * Analytics & reporting dashboards * System settings & automation tools The system should include dashboards, reports, performance analytics, role-based permissions, and offline data handling with automatic sync once internet is restored. POS & ERP Web Application Devel… Security & Performance Requirements: * Role-based access control * Secure API authentication * Data encryption in transit * High availability and optimized performance for large datasets POS & ERP Web Application Devel… Deliverables: * Fully functional POS & ERP web application * Source code (frontend + backend) * Deployment-ready builds for cloud and store environments * Database schema and API documentation * Admin and user manuals * Basic operational documentation * Optional mobile app phase (future extension) Keywords: Backend Development Frontend Development Node.js React.js Artificial Intelligence Mobile App Development Web Development Python Flutter React Native