I need senior smart contract engineer.

Hi, guys.
I need a developer who has experience in ERC721 and ERC1155 smart contract.
The task is following this:
ERC-721
ERC-1155 (multi token)

- Artist Royalties on secondary sales must be fixed - should be modifiable by contract owner
- Platform Fees on original sale - should be modifiable by contract owner
- Platform Fees on secondary sales - should be modifiable by contract owner

If you can do this, let me know.
if you read this post, write "I'm human." in your proposal top.
Thank you everybody.