web3 backend / Full Stack Developer

We are looking for a senior backend (or full stack) web3 developer. We are building web based NFT shop on Polygon blockchain. Main features NFT shop will have: End-users: 1) Browse and search/filter NFTs and its details; 2) Purchase NFTs via fiat payment provider (checkout); 3) Receive NFT in their non-custodial wallet 4) Connect Metamask and WalletConnect, and ability to manually input purchaser` address 5) Shopping cart (in case if user wants to purchase several NFTs) Admin panel: 1) Generate and publish/edit/remove NFT collections and NFTs to the shop 2) Set up prices for NFTs 3) Generate images via AI image generators and/or upload images manually for NFTs 4) View history of orders (who, when purchased NFTs, status, etc) Infrastructure: 1) shop`s smart contracts will be deployed on mainnet Polygon (development can be done on testnet) 2) images for NFTs must be stored and delivered with IPFS / CDN Some details: 1) Smart contracts are already in development. 2) APIs for interacting with smart contract functions (via rpc nodes) are also in development. 3) We need backend development from scratch which is the largest part of the whole project. 4) We also need frontend development, UI/UX will be defined by realised functionality afterwards There is an attached description of the project with proposed technical details and basic decomposition. We expect to complete the whole project in 1-2 months. We are fine either with pay by the hour or fix priced contract. In case of part-time availability we expect availability for at least ~20 hours per week in order to complete project in estimated timeframe.