Lead the architecture and development of scalable backend APIs for music catalog, search, recommendation, personalization, and user interaction. Design data models, integrate third-party metadata and streaming services, optimize performance, implement observability, and ensure reliability. Establish engineering standards, review code, mentor developers, evaluate technologies, and collaborate with product, frontend, and data teams. The role requires extensive backend experience and expertise across cloud platforms, deployment, databases, caching, messaging, and CI/CD.