Senior Site Reliability Engineer

Role overview

As a Senior Site Reliability Engineer (SRE) on the SRE team, you will proactively and reactively improve the reliability of Block’s platform and critical infrastructure. You’ll be metrics-driven and systems-oriented, building distributed platforms that enable safe, scalable product development using AI-driven tooling and automation.

Responsibilities

• Build and extend reliability platforms and tools across the company
• Standardize reliability tooling across multiple platforms and organizations
• Triage and coordinate stabilization of sev 0–1 incidents
• Serve as primary oncall (12 hours per day, one week every few weeks, depending on team size)
• Lead incident command, coordinate mitigation, and drive escalation during high-severity events
• Drive platform-wide reliability improvements, including shared operational tooling and deploy-safety patterns
• Use AI to enhance signal detection, reduce alert noise, and accelerate root cause analysis
• Design and implement safe deployment patterns such as progressive delivery, automated rollback, and guardrails

Requirements

• Drive to perform root cause analysis and take steps to fix underlying issues
• Demonstrated technical initiative and leadership, especially on backend/platform projects
• Familiarity with AI-driven tooling for observability, incident analysis, or automation
• Experience running production oncall for high-availability systems
• Strong incident management skills: structured triage, mitigation under pressure, and blameless postmortems
• Fluency with CI/CD, progressive rollout strategies, and rollback automation
• Monitoring & observability expertise: tuning alerts for uptime, error rates, latency regressions, and resource exhaustion
• Ability to create and maintain evidence-based maturity assessments using trailing 90-day data windows
• Comfort with vendor/dependency management, including maintaining validated escalation contacts reachable within ≤ 5 minutes
• Strong accountability, autonomy, and desire to perform and grow as an engineer

Nice to have

• Fluency with evidence-based reliability program practices (maturity assessments)
• Further experience integrating AI into operational workflows (beyond incident analysis/alert tuning)