Software Engineer - Infrastructure (Mid - Senior)

Full Timesenior

San Francisco, CAPosted 7 weeks ago

Role Overview

Julius is hiring a Software Engineer - Infrastructure (Mid - Senior). This is a full-time role in San Francisco. Part of Julius's Security hiring. Full responsibilities, required qualifications, and the apply link are listed in the description below.

Salary Context

Salary is not disclosed in this posting. Market median for Senior-level Security roles is $130k-$155k (based on 19 comparable listings). Many employers share specifics during the interview process or after an initial screen.

Resume Keywords to Include

Make sure these keywords appear in your resume to improve ATS scoring

AWSGCPAzureDockerKubernetesTerraformIntercomNotion

Job description

Compensation: Competitive base salary and meaningful equity

Benefits: Health & dental insurance, gym reimbursement, daily team meals, commuter benefits

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.

About Julius

Julius

SecurityOn-site

3 other open roles at Julius on TryApplyNow.

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Frequently Asked Questions

How do I apply for the Software Engineer - Infrastructure (Mid - Senior) position at Julius?

Use the Apply button above to submit your application directly to Julius. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Where is the Software Engineer - Infrastructure (Mid - Senior) position at Julius located?

This position is based in San Francisco. Julius has not indicated remote or hybrid options for this role, so candidates should plan for on-site work.

What does a Software Engineer - Infrastructure (Mid - Senior) at Julius earn?

Julius has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Software Engineer - Infrastructure (Mid - Senior) role at Julius posted?

This role was posted on May 21, 2026 (50 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

How much experience does the Software Engineer - Infrastructure (Mid - Senior) role at Julius require?

This is a senior-level position. Most senior roles call for 5+ years of directly relevant experience. Julius lists their specific requirements in the description below, so review the must-have qualifications closely before applying.

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