I need to create a webapp for online inventory management system, order fulfillment system, POS, with dual currency - CZK and EUR, because I have customers from both Czech and Germany.

I need to create a webapp for online inventory management system, order fulfillment system, POS, with dual currency - CZK and EUR, because I have customers from both Czech and Germany. My business is facebook online shop about beauty cosmetics nails products. Looking for professionals and already have expertise in creating these web apps with nice and modern design and responsive Design for mobile, tablet, PC. Process: 1) Adding a New order - Add a new customer, with Name and Facebook link to their profile, also able to save to the customers database - Add order items with one or another currency (CZK or EUR) with SKU search or Product Name search - Automatically fill up address from the database if customer is in the database - Choose shipping options - Choose payment option (Add pay later option and have a Pay Later section in the menu bar) - Create a custom invoice with different language - Ability to attach files to print (e.g external invoices) - Add Shipping note - Fast add products process by search or batch add e.g. add gel polish color numbers 2) Order Fulfillment - Ability to scan product barcode to check off the product order item - Checkboxes to tick off items in the order list - Ability to print all order invoices - Realtime updates if two users or more are currently in the same page (Order fulfillment page) 3) Inventory - Show all data - Export Excel - Show currencies for each item CZK and EUR, and USD 4) Purchase/Import - Add items to inventory with Categories, Group them if there is for example Gel polish and Gel polish color numbers - Calculate weighted purchase price - Add Supplier name and link/source 5) Returns Add returns of orders or Replacement 6) Dashboard - Show today's Total Revenue and Total Profit - Show graphs of Revenue and Profit for 1 year/1 month/1 week - Show total orders to fulfill (Count) - Show unpaid orders - Show graph for Total Spent by Years (total import costs) - Show Inventory total worth price - Ability to add or remove and position graphs 7) Sales - Sales archive database, ability to search - Click to view in detail and view invoices Features: - API to list access inventory and other databases, add orders through API etc. there are more to add