Backend Engineer: 1. More than 5 years of development experience in the web3 field. 2. Familiar with Node.js and commonly used code libraries for on chain interaction on the web, such as web3.js, ether.js, etc. 3. Familiar with Java, Solidity, Python. Familiar with smart contracts and EVM principles, with experience in smart contract development. 4. Able to adapt to the pace of work in start-up companies, have enthusiasm for work, independently complete various tasks, and cooperate well with the team.