Looking for developer to develop NFT Smart Contract & Blockchain APIs

We are looking for experienced developer to assists us in developing smart contract for Non-Fungible Token (NFT) on Polygon Blockchain and create APIs so our app can publish the Smart Contract via the APIs. The APIs need to be developed using NodeJS and support for both single and bulk publishing. Functionalities required
- Mint NFT
- Retrieve NFT Item Pricing, Number of owners for NFT Item, Contract Info, Trading Volume, Events
- Buy, Sell And Transfer NFT
- ETH Conversion to USD
- Retrieve all NFT Items belonging to a specific address