Software Engineer, Back-End - Mail

As a Back-End Engineer, you will:

Build and operate high-throughput production services that power AI agent orchestration, connector integrations, and real-time data pipelines.

Design and build core platform services — task schedulers, session and conversation history, client-server protocols, and the APIs that connect our AI engine to every product surface.

Work across the Superhuman product suite — whether that's Go, Mail, Docs, or Enterprise — depending on where you and the team see the best fit.

Collaborate closely with ML/AI, Product, and Front-End engineers to ship AI-powered features end to end.

Build and evolve infrastructure as code, targeting high availability for both consumer and enterprise customers.

Contribute to an engineering culture with a strong emphasis on documentation, testing, and reliability.

Mentor and grow junior engineers on the team.

Qualifications
5+ years of experience in back-end development, with strong fundamentals in algorithms, data structures, and system design.

Experience building, deploying, and debugging production systems at scale.

Experience with AWS or other cloud platforms (GCP, Azure).

Comfort working with AI-powered systems — whether that's building infrastructure for LLM-based features, managing agentic workflows, or integrating with ML pipelines. Prior experience building backend services for AI products is a plus.

Fluency with AI coding tools (Copilot, Cursor, Claude Code, etc.) and a point of view on how they change the way teams build software.

Experience with real-time systems, event-driven architectures, or high-throughput API design is a plus.

Deep understanding of CI/CD and infrastructure as code.

Demonstrated ability to work independently, manage priorities across multiple projects, and collaborate effectively with cross-functional teams.

Strong product instincts — you care about the end-user experience and can make good tradeoffs between speed and reliability.