Site Reliability Engineer Cover Letter Example

I define and operate SLOs for 22 services on a freight-tracking platform handling 40,000 requests per second at peak, and for the last three years that platform has held 99.98% availability for 12 million monthly users. I'm applying to [Company name] because reliability at that scale is a discipline, not a department, and it's the discipline I've built my career on.

Wiring automated diagnosis and runbook execution into our paging workflow brought MTTR down from 45 minutes to 9, and Go-based operators I built for certificate rotation and deploy verification return roughly 30 engineer-hours a week to product teams. An error-budget policy I instituted froze feature deploys twice last year, both times to fix issues that would have caused repeat outages otherwise.

I run quarterly chaos game days across 18 services with Litmus, which surfaced 11 resilience gaps we closed before any customer saw them, and I hold a Certified Kubernetes Administrator credential alongside an AWS Solutions Architect Associate certification. I write the postmortems myself and chase every action item to done, not just to assigned.

I'd welcome a conversation about the reliability goals behind [Company name]'s platform and where eight years of treating uptime as an engineering discipline could help. I'm available for an interview at your convenience. Thank you for your time and consideration.