Multichannel Tool for E-Commerce/ Dropshipping

Looking for someone who can create a multichannel tool for eCommerce/ Dropshipping / sales/Warehouse/ listing/ inventory/ API/ tracking and all that stuff that is needed and required. It's for me personal at first. Don't want to pay every month a fee. So I need my own program for my Dropshipping business to make it easier and have a all in one solution tool. Interested? Talk to me.