Site Reliability Engineer

The role

You will design, build, and operate ground and site network infrastructure. This includes architecting Kubernetes platforms and defining security posture for commercial and secured environments.

What you will do

• Architect and build ground and site network infrastructure through the platform layer.
• Design, deploy, and scale highly available Kubernetes clusters.
• Own the security posture of ground infrastructure.
• Build and maintain infrastructure as code using Terraform and Terragrunt.
• Establish observability across the ground network.
• Design and run CI/CD pipelines and automation.
• Act as a primary site reliability engineer for ground systems.
• Partner with security, mission operations, and program teams.
• Set architectural standards and mentor other engineers.

Required qualifications

• Applicants must be U.S. persons as defined by U.S. export-control law.
• 5+ years of experience in site reliability, infrastructure, or network engineering in aerospace, defense, satellite, or mission-critical domain.
• Hands-on experience architecting and operating ground network or large-scale production network infrastructure.
• Deep expertise with Kubernetes and containers.
• Strong networking fundamentals across routing, switching, segmentation, and secure network design.
• Proven experience with infrastructure as code with CI/CD, automation, and observability tooling such as Prometheus or Grafana.
• Working knowledge of security and compliance for regulated or classified environments.
• Proficiency scripting and building tooling in Python, Go, or a comparable language.

Nice to have

• Active Top Secret or Top Secret/SCI clearance
• Prior experience supporting classified or government space programs or standing up infrastructure across multiple classification levels
• Familiarity with GitOps workflows and tools such as ArgoCD
• Familiarity with modern observability stacks including Mimir

Benefits

• Equity in Apex
• 100% company-paid medical, dental, and vision for you and your dependents
• $100k life insurance at no cost
• Starting at 15 days vacation, growing to 20+ days annually
• 10 paid holidays
• 100% match on first 3% and 50% on next 2% 401(k) matching
• 8 weeks paid parental leave
• Childcare reimbursement up to $350/day for work-related travel
• Daily catered lunch and unlimited snacks
• Monthly office socials, pickleball tournaments, run club, and gatherings
• Dream desk setup

Before you apply

• Applicants must qualify as a U.S. Person (U.S. citizen, national, lawful permanent resident, refugee, or individual granted asylum) or be able to obtain required export authorizations.

About the company

Apex manufactures satellite buses at scale using software, vertical integration, and hardware. They are a fast-growing startup that has raised more than $500M in funding.