As a senior engineer on the iCloud Calendar team, you will play a key role in designing and evolving the infrastructure that powers one of the most widely used calendar services in the world. You will:Design, implement, and deploy backend services that are scalable, reliable, and secureOwn and maintain critical components of the iCloud Calendar backend stackInvestigate and resolve complex production issues, improving observability and performanceWork closely with client engineers to support new feature development and integrationWrite clear design documents and contribute to technical planning and reviewsDevelop comprehensive unit, and integration tests to ensure code quality