Senior Site Reliability Engineer

Senior Site Reliability Engineer (System Engineering): Build and scale infrastructure supporting billions of messages per day with an accent on MySQL performance tuning, cloud-native technologies, and automation. Focus on designing reliable distributed systems, improving incident response, and leveraging AI tools for faster decision‑making.

Company

Customer.io powers automated communication for over 8,000 companies, using technologies like Go, React, Ember, and AI to deliver billions of messages daily.

What you will do

• Build and scale infrastructure to support billions of messages and real-time events
• Automate deployments, alerting, and incident response processes
• Improve on‑call experience with clear alerts and faster resolution
• Tune MySQL and enhance reliability of distributed systems
• Collaborate across teams to debug, ship, and support production systems
• Share knowledge publicly through videos, writing, and mentorship
• Leverage AI tools to prototype and improve decision‑making

Requirements

• 7+ years experience in SRE or infrastructure roles
• Deep MySQL expertise including schema design and performance tuning
• Fluency in cloud‑native technologies; GCP and Terraform preferred
• Proficiency in Go and Bash scripting
• Strong skills in observability, incident response, and debugging distributed systems
• Preference for action and ownership of technical decisions

Culture & Benefits

• Competitive salary range $140,000 - $180,000 USD
• 100% coverage of medical, dental, vision, mental health, and supplemental insurance for employee and family
• 16 weeks paid parental leave and unlimited PTO
• Stipends for remote work and wellness
• Professional development budget
• Inclusive and equitable team culture

Hiring process

• Application review
• Recruiter call (30 mins)
• Behavioral interview (60 mins) focusing on ownership, product thinking, and collaboration
• Take-home assignment
• Technical interview and assignment review (90 mins) including system design discussion
• Background check and employment verification