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Senior/Staff Site Reliability Engineer

Horizon3 AI· Engineering
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Remote$199.8k - $270k + equityFull-timePosted 3w ago

About the role

Hands-on Senior or Staff Site Reliability Engineer to own and evolve Horizon3's reliability strategy, operating model, and engineering-wide standards for the NodeZero platform. Leads high-impact reliability initiatives, sets service ownership, SLIs/SLOs, observability standards, incident management practices, and on-call models in a fully remote, remote-friendly environment.

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.

Qualifications

  • 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 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.

Skills

Required:SRE strategy and governanceObservability and monitoringIncident managementCommunication

Benefits

  • Inclusive Team
  • Growth Opportunities
  • Innovative Culture
  • Hybrid & Remote Work with Chicago office
  • Competitive Compensation including salary, equity, and benefits (health, vision, dental) with flexible vacation and parental leave
Last updated Oct 1, 2026. Interested? Apply on the company site.

About Horizon3 AI

Only Pentesting Platform Proven in Production

Continuously assess, fix, and verify your security posture. Securing enterprises across many attack surfaces.

PentestingSecurity PostureThreat DetectionVulnerabilitiesRisk AssessmentOffensive Security
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