### Key Responsibilities1. Write high-quality code in JavaScript and TypeScript for full-stack development.2. Expertise in Node.js for the development and maintenance of backend services.3. Familiarity with the React framework for frontend development and maintenance.4. Familiarity with at least one server-side programming language such as Python, Java, Golang, Rust, etc.5. Proficiency in ETH API calls in the web3 direction.6. Design, develop, and deploy smart contracts; Optimize and maintain existing smart contracts.