EMAG API integration into our own shop system

EMAG API integration (EMAG is a platform similar to ebay): We also have our own webshop, which is our centralized dashboard & database. • Product synchronisation: 1. New products need to be added to our EMAG platform shop, the price, description and quantity need to be updated whenever there are any changes. If the stock changes due to any type of sale (no matter through which channel - whether on our own shop or any other platform we use), and the quantity in our main database changes due to thsi sale, the stock needs to update to other platforms, in this case / project EMAG. (other platforms have already been integrated and this should follow a similar logic). We also need tob e able to change the quantity from our summary tab. - Short: New products need to be listed, adjusted (stock quantity, price changes, changes in the description), or removed. 2. If an order comes in via EMAG, this needs to be pulled into our backend and when we change the status in our backend e.g. invoice sent, order shipped with tracking ID, order cancelled, this needs to be synched back to EMAG. If there are any changes from EMAG these also need tob e updated to our backend – payment type, payment received, order cancelled by customer. 3. If a new order comes in the stock needs to be adjusted accordingly and pushed back to all plattforms. Since several have already been integrated esentially only the central database and the emag stock have to be updated. 4. We need a field to show the different FX rate, as we sell in a different currency on EMAG. 5. We need a CSV export for all products and master upload which allows to updated changes for all products at once (e.g. if a common factor changes such as the tax rate). Please provide a realistic estimate in regards to the budget and timeline for the emag API integration into our shop system, let us know in case you require any additional details - the documentation is attached. EMAG has four platforms, this project is for EMAG.BG.