Superhuman is hiring a back-end engineer for its Mail team. The role focuses on building and operating production services for AI-driven workflows with real-time infrastructure, calendar syncing, and APIs used across desktop, web, and mobile. The tech stack includes Go, Postgres, Kubernetes, and AWS. The ideal candidate will bring at least five years of back-end experience, solid fundamentals in algorithms and system design, and familiarity with cloud platforms and real-time architectures.