Software Engineer, Compute Infra — VM Orchestration & Cloud

Cursor; San Francisco (CA); On-site; USD 180,000 - 260,000; Full time

Job summary

SpaceXAI in San Francisco is seeking a Software Engineer to join the Compute Infra team. You’ll help build sandbox infrastructure providing each agent its own VM, powering Grok models and agent-based workflows across datacenters.

You’ll own the virtualization layer (Firecracker and Cloud Hypervisor), scale control planes, and ensure secure, resilient networking across cloud and on-prem environments. Ideal candidates have hands-on orchestration experience at scale and a passion for infrastructure

Qualifications

• Bachelor's degree in CS/engineering/math, or 2+ years software experience in lieu of a degree.
• Deep experience with compute orchestration (Kubernetes or Mesos).
• Built/operated large fleets of VMs / sandboxes.
• Experience with Linux kernel and virtualization tech.
• Interest in infrastructure primitives for future agents.

Responsibilities

• Rearchitecting the control plane / scheduler to support 1 million concurrent VMs per cluster.
• Building a ublk block device that can dedupe, lazy load, and snapshot VM data.
• Designing an egress proxy and network isolation for secure traffic.
• Designing resilient systems across cloud and on-premise datacenters.

Skills

Kubernetes

Mesos

VM fleets

Linux kernel

Virtualization

Networking

Education

Bachelor's degree or equivalent

Job description

SpaceXAI in San Francisco is seeking a Software Engineer to join the Compute Infra team. You’ll help build sandbox infrastructure providing each agent its own VM, powering Grok models and agent-based workflows across datacenters.

You’ll own the virtualization layer (Firecracker and Cloud Hypervisor), scale control planes, and ensure secure, resilient networking across cloud and on-prem environments. Ideal candidates have hands-on orchestration experience at scale and a passion for infrastructure