Software Engineer - Infrastructure (Mid - Senior)

Title: Software Engineer - Infrastructure (Mid - Senior)

Location: San Francisco, CA / Remote (US; CA)

**Compensation:** Competitive base salary + meaningful equity\

**Benefits:** Health & dental, gym reimbursement, daily team meals, commuter benefit

## About Julius

We’re an applied AI lab building coding agents. Julius executes **\~1M lines of code every 36 hours** for **1M+ users** and has generated **3M+** visualizations. All code runs in code sandboxes (**isolated remote containers**) that we manage. We’re revenue‑generating and backed by AI Grant, YCombinator, Bessemer Venture Partners and the founders from Vercel, Notion, Perplexity, Palantir, Replit, Zapier, Intercom, and Dropbox.

## The Role

Build and scale the **code‑execution sandboxes** that power Julius across cloud environments (AWS and GCP). We orchestrate **500k+ containers/month** and growing. You’ll own reliability, performance, and security for multi‑tenant compute.

## What You’ll Do

• Design and operate secure, multi‑tenant **container infrastructure** with fast startup and smart autoscaling.
• Ship cloud deployments (Helm/Terraform) with SSO, network controls, and audit logging.
• Drive observability (metrics, traces, logs) with clear SLOs; lead incident response.
• Optimize images, scheduling, networking, and cost ; build fair‑use and rate‑limiting controls.

##

What You Bring

• Production Kubernetes and container internals (Docker/containerd); strong **networking** fundamentals.
• Cloud (AWS/GCP/Azure) and IaC (Terraform/Helm).
• Monitoring/Logging (Prometheus, Grafana, OpenTelemetry, ELK/Vector).
• **Security** best practices for containerized, multi‑tenant systems.

## Nice to Have

• gVisor/Kata/Firecracker; Cilium/eBPF; GPU scheduling; serverless autoscaling (KEDA/Knative/Karpenter).
• You’ve built an AI side project and enjoy tinkering with LLMs.

## Why Julius

Small, senior team; massive impact surface; hard infra problems at meaningful scale.