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Hi Sir/Madam,
I hope you doing well.
I am Amazon Expert and doing Amazon APIs since 2010.
1. I will develop a web app for you which will be scheduled (crone job) as per your need.
2. The app will see if there is any new order placed, if yes it will upload to your system.
3. The app will be able to take a csv/excel file in bulk along with ORDER-ID and TRACKING-NUM for Amazon acknowledgement and will send to amazon. This will mark the orders at Amazon as shipped.
4. I have a similar application which I had developed for one of my client a couple of years ago, but that was built on .NET. Let me know if you are ok with .Net
Regards,
Mehboob Afridi