The Lead Backend Engineer will design, develop, and maintain scalable backend systems and API services. They will build high-performance data infrastructure, mentor other engineers, and contribute to the platform's stability. Responsibilities include designing, developing, and maintaining backend applications and API services, architecting and building data reporting services, developing and optimizing data pipelines, implementing monitoring and alert systems, writing automated test suites, and proactively resolving performance bottlenecks. The role also involves mentoring junior engineers and providing technical support.