Senior/Staff Site Reliability Engineer

Horizon3.ai is a remote cybersecurity company focused on helping organizations proactively identify, fix, and verify exploitable attack vectors through its NodeZero platform. The Senior/Staff Site Reliability Engineer will own and evolve the organization-wide reliability strategy, establish engineering standards, lead cross-functional reliability initiatives, and improve observability, incident response, and operational readiness.

Responsibilities:

• Own and evolve the engineering-wide SRE strategy, operating model, and reliability standards, aligning them to customer impact, business priorities, and risk
• Lead cross-functional alignment across Infrastructure, product, service, security, and business stakeholders to improve reliability, observability, incident response, and operational readiness across multiple teams
• Establish an organization-wide approach to service ownership, meaningful SLIs and SLOs, and error budgets for critical customer paths and services
• Define and drive adoption of observability standards across pipelines and platform components that report on service health, performance and operational risk
• Set the standard for dashboards, actionable alerting, runbooks, and escalation paths
• Drive end to end complex cross-functional reliability initiatives
• Set and raise the engineering wide bar for incident management, incident command, on-call health, post-incident learning, and recovery readiness
• Shape the technical direction, operationable model, and growth path of the SRE function
• Participate in a 24/7 on-call rotation and help design an on-call model that is sustainable, appropriately staffed, and continuously improved

Requirements:

• Experience designing, operating, and troubleshooting large scale distributed systems in production environments
• Deep knowledge of reliability engineering, observability, incident management, and production operations, with demonstrated ability to turn that knowledge into standards and practices adopted by others
• Experience in establishing SLIs, SLOs, actionable alerts, observability, and service ownership
• Backend experience building backend systems and automation that reduce optional toil, strengthen safeguards, and operational efficiency
• Experience in leading high severity incidents and improving incident response programs
• Excellent written and verbal communication skills including technical designs, runbooks, postmortems, and operational documentation
• Python and Terraform (Infrastructure as Code), or equivalent automation and infrastructure-as-code tools
• Experience with Observability tools such as Datadog, New Relic, Grafana, or equivalent platforms
• Experience operating production services in AWS and Kubernetes
• Experience with CI/CD pipelines such as Gitlab CI, ArgoCD, or GitOps workflows