E-commerce Fulfillment System Development

I am a 3PL fulfilment centre and i require someone Build a system similar to starshipit.com which is a shipping and fulfilment platform. I want to integrate 5 of my current customers and integrate their own e-commerce platforms to pull their customers orders, manage shipping, and generate shipping labels for their ecommerce websites. Most of our customers' websites are built on Shopify and WooCommerce, and they require API integrations with Australia Post and Sendle. The platform would need a mix of front-end and back-end technologies.

Here’s a breakdown of the key skills you may need.

Front-End:

HTML, CSS, JavaScript (for user interface)
React.js, Vue.js, or Angular (for dynamic web apps)
Back-End:

Node.js, Python (Django/Flask), or Ruby on Rails (for server-side logic)
RESTful API development (for pulling orders from e-commerce sites)
Express.js (if using Node.js)
Databases:

MySQL, PostgreSQL, or MongoDB (for storing order and shipping data)
APIs & Integration:

Experience with e-commerce APIs like Shopify, WooCommerce, or Magento (for pulling orders)
Shipping APIs (like EasyPost, Shippo, or Australia Post)
DevOps & Deployment:

AWS, Azure, or Google Cloud (for hosting and scaling)
Docker (for containerization)
You will need to be a full-stack developer with experience in web app development and API integration, specifically with e-commerce platforms and shipping carriers.

I require some quotes to build something like this please. Please look at - https://starshipit.com/ and get a feel of what the platform does before you tell me your a programmer and can help me.

Please don't send me auto bids.
Thanks