We are looking for an outstanding senior backend engineer to join our team as a technical leader. This is a completely remote position open to candidates from the United States or China. In this role, you will become the cornerstone of our engineering team, driving the development of our backend system. You will be responsible for creating powerful and scalable services to power our artificial intelligence platform, collaborating with front-end developers, and leading the development of new features and infrastructure improvements. Main responsibilities include developing and maintaining scalable and powerful backend services and APIs. Collaborate with front-end developers to integrate user oriented elements with server-side logic. Implement high-performance database queries and optimize the database for performance. Ensure that the application has the best possible reliability, quality, and responsiveness. Lead the development of new features and infrastructure improvements. Write clean, maintainable, and well documented code according to current best practices. Guide junior engineers and promote a culture of technological excellence.