Software Engineer, Backend

XOXO is a research lab building the interface of intelligence for everyday life. We're a stealth team of hardcore engineers, designers, and researchers discovering solutions to novel problems impacting life outside work.

With a recent breakthrough across infrastructure, architecture, and the model layer, we’re hiring serious builders to develop the interface and application layer that will bring our vision to life.

We’re hiring a backend engineer to design, build, and operate production-grade backend systems. This role is for someone who is deeply fluent in cloud infrastructure, distributed systems, observability, and data persistence, where testing and stability are at the core of how you operate.

You’ll take full ownership of backend projects from concept through production launch, with a focus on performance, reliability, infrastructure efficiency, and security throughout the development lifecycle.

Build and operate backend services and distributed systems in production on AWS or GCP.

Design data storage and retrieval using the right mix of vector, OLAP, SQL, NoSQL, cache, and search systems.

Implement and run observability: monitoring, logging, tracing, and alerting to keep systems healthy and performant.

Design and implement comprehensive test harnesses that cover deployment and runtime failure scenarios.

Own backend projects end-to-end: complex feature development, CI/CD + Terraform, stability, and security.

Location: San Francisco, CA (on-site)

Compensation: $250k-$500k expected salary with 1% to 5% equity depending on background.

Benefits: Top tier health, dental, vision benefits, and many other perks.