Software Engineer - Infrastructure (Mid - Senior)

**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.