Inventory Management - Amazon Seller APIs integration

We are technology providers for e commerce company selling their products on Amazon US marketplace.
Need developer to integrate the Amazon Seller APIs to inventory system.
We wish to automate the following work flows -
1> Order management
2> FBA Shipments
3> Reimbursements
4> Refunds
5> Payment settlement
6> Inventory upload
7> Pricing changes
Integrate Amazon marketplace APIs with inventory system.