Hiring Team of Unity developer for Ongoing project

We are a new NFT game project. Our Aim is to create our world and give the user the real connection between the nft world and our game. The game should be handle at least 400/500 players at the same time. Run on webgl first and after we will see different platforms. Unity is our tool at the moment. the first phase of this project is to have the basics 1. Multiplayer (right now we are running with node but we are open to photon or other solutions) 2 in game chat 3 in game voice chat All this complete and tested in 1 week We are super late so we need to make all perfect we have only one try