- Job title
- Software Engineer - Infrastructure (Mid - Senior)
- Job location
- San Francisco, CA / Remote (US; CA)
- Job description
- **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.
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