.Net POS System with Offline Support

I am in need of a desktop version of a Point of Sale (POS) system built on the .Net framework. The system should encompass a variety of key functionalities, namely: - Inventory Management: The ability to track stock levels, orders, sales and deliveries. - Sales Tracking and Reporting: Comprehensive tracking of sales and generating reports based on the data. - Customer Management: A system for managing customer information and interactions. - Barcode Scanning: Integration with barcode scanners for quick product entry and sales processing. - Multi-Language Support: Easily switch between languages to accommodate diverse users. - Receipt Printing: Capability to print receipts for customers with custom templates. - Employee Time Tracking: Track employee working hours and manage schedules directly within the POS system. - Mobile App Integration: Extend your POS system's capabilities to mobile devices for on-the-go functionality. - Integration with eCommerce: Synchronize sales, inventory, and customer data with online stores. - Loyalty Programs: Management of customer loyalty programs including points accumulation and redemption. - Gift Card Management: Issue, track, and redeem gift cards directly within the POS system. - Promotions and Discounts: Manage special promotions and discounts, applying them automatically at checkout. - Advanced Reporting: Create custom reports and dashboards to gain deeper insights into business performance. Of utmost importance is the requirement for the POS system to function offline. This is essential for maintaining operational continuity in situations of network unavailability. The system should seamlessly switch to offline mode without disrupting its functionality. In terms of user access control, I require a system with individual account permissions. This means each user will have their own account with tailored access levels, ensuring both security and personalized experiences. Ideal skills for this project would include extensive experience with .Net, a strong understanding of POS systems, and the ability to implement robust offline functionality and user access controls. The system should support credit and debit card payment processing. The POS system should be compatible with both Windows and macOS. The system should use SQL Server as the database backend. The design should follow a modern and minimalist style.