Site Reliability Engineer

Role Overview

Five9 is hiring a Site Reliability Engineer (SRE) to build and maintain highly reliable, scalable systems. The role is ~50% software engineering and ~50% operations, emphasizing automation, monitoring, and reliability engineering over manual operations.

Responsibilities

• Observability & Monitoring
  • Design and implement dashboards and metrics for both OS/platform and application monitoring
  • Use primary (RED) and secondary (USE) indicators
• Availability & Reliability Engineering
  • Define and manage SLIs (Service Level Indicators), SLOs (Service Level Objectives), and error budgets
• Performance Monitoring & Alerting
  • Build proactive alerting and performance monitoring to prevent user impact
• Incident Management
  • Participate in on-call rotations and lead incident response
  • Run post-mortems and drive remediation
  • Maintain the official on-call routing
• CI/CD & Deployment Pipeline Management
  • Maintain continuous integration and deployment pipelines across cloud and on-prem deployments
• Infrastructure as Code & Configuration Management
  • Develop and maintain infrastructure using Terraform, Ansible, or similar tools
  • Automate configuration and ensure consistency across environments
• Security & Compliance
  • Ensure security scanning exists and review escalated vulnerabilities
  • Maintain authentication, authorization, and audit logging
  • Support regulatory and industry compliance reporting
  • Participate in security incident response and remediation
• Cost Optimization & Capacity Planning
  • Monitor and optimize cloud resource usage and costs (planned and unplanned changes)
  • Analyze usage patterns and plan future capacity
  • Recommend cost-effective architecture and right-sizing strategies (including automated scaling)
• Platform / Common Services Engineering
  • Build and maintain shared services (e.g., notification systems, caching layers, message queues)
  • Support database reliability/performance/scaling where not handled by dedicated DB teams
  • Implement service discovery, load balancing, and network policies
  • Create developer tools to improve developer productivity and system reliability

Required Qualifications

• 3+ years managing large-scale production environments
• Comfortable with 24/7 on-call and incident response
• Strong Linux/Unix system administration skills
• Understanding of TCP/IP, DNS, and load balancing

Nice-to-haves / Implied Skills

• Experience with observability using RED/USE metrics
• Hands-on Infrastructure as Code with Terraform and/or Ansible
• Experience with CI/CD pipelines for cloud and on-prem deployments
• Familiarity with security scanning, access control, and audit logging
• Background in cost optimization and capacity planning