Senior Site Reliability Engineer

Block is a company that builds simple, powerful tools to create an open economy for all. As a Senior Site Reliability Engineer, you will improve the reliability of Block's platform and infrastructure, leveraging AI-driven tooling and automation to enhance observability and incident response.

Responsibilities:

• Build and extend platforms to improve system reliability
• Work on team goals that encompass reliability for the entire company
• Standardize reliability tools across multiple platforms and organizations
• Triage, coordinate, and lead stabilization of sev 0–1 incidents
• Serve as primary oncall, maintaining structured escalation paths and exercising leadership escalation
• Drive platform-wide reliability improvements, shared operational tooling, and deploy-safety patterns
• Use AI-driven systems to improve signal detection, reduce noise, and accelerate root cause analysis
• Design and implement safe deployment patterns (progressive delivery, automated rollback, guardrails)

Requirements:

• Drive to root cause systems with many moving parts and take the necessary steps to fix them
• Demonstrated technical initiative and leadership on previous projects, especially those with a backend/platform focus
• Familiarity with AI-driven tooling for observability, incident analysis, or automation
• A mindset that naturally reaches for AI to accelerate problem-solving and reduce toil
• Experience running production oncall for high-availability systems
• Strong incident management skills — structured triage, mitigation under pressure, blameless postmortems
• Fluency with CI/CD pipelines, progressive rollout strategies, and rollback automation
• Monitoring & observability expertise — building/tuning alerts for uptime, error rates, latency regression, and resource exhaustion
• Ability to create and maintain evidence-based maturity assessments using trailing 90-day data windows
• Comfort with vendor/dependency management — maintaining validated escalation contacts reachable within ≤ 5 minutes
• Boundless curiosity, autonomy, and a strong sense of accountability
• A strong desire to perform and grow as an engineer
• 5+ years of software development experience