Finalize & Integrate Smart Contract on Next.js

I'm seeking a proficient Solana developer with Rust expertise to finalize a smart contract and integrate it into our Next.js site.

The object of the smart contract is to be able to Deposit/Withdraw Solana tokens from it and notify our backend service.

A user should only be able to withdraw from the smart contract with a signature generated by a backend service (That you also need to be able to help us with).

Key Responsibilities.

- Refining the already developed smart contract
- Conducting thorough testing and deploying the contract
- Seamless integration of the smart contract with the frontend and backend.
- Ensuring the smart contract can handle token transactions and data storage/retrieval post integration.

The contract is mostly developed based on a Solidity Version of the contract (With the help of ChatGPT) but not yet integrated or tested.

The ideal candidate should have:

- Extensive experience with Solana and Rust
- Proficiency in Next.js
- A proven track record of smart contract testing and deployment
- Strong problem-solving skills for frontend integration challenges
- Experience handling smart contracts with token transactions and data storage/retrieval.