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Braze is seeking a Senior Site Reliability Engineer to own and operate the company's critical ingress infrastructure, supporting the Ruby on Rails monolith and Go API services at massive scale. You will be responsible for keeping internal-facing services and platforms running smoothly while serving over 3.3 billion monthly active users and delivering billions of messages daily.
In this role, you will architect and operate high-performance NGINX routing and Kubernetes ingress controller layers that manage real-time API ingestion traffic. You'll own and expand automated scaling routines for high-throughput services, leveraging RED metrics, Horizontal Pod Autoscalers, and custom scaling policies to handle extreme traffic spikes seamlessly.
You will partner directly with product engineering teams to translate feature requirements into resilient, highly available, and scalable technology stacks. This includes establishing meaningful Service Level Indicators (SLIs) and Service Level Objectives (SLOs), conducting in-depth systems design and capacity planning, and managing error budgets to balance rapid feature deployment with stability.
Incident response and on-call excellence are core to the role. You'll participate in PagerDuty on-call rotations, lead root-cause analysis and blameless retrospectives for availability and performance incidents, and translate operational learnings into permanent system improvements.
Required: 5+ years as a DevOps or SRE in high-scale production environments; deep hands-on NGINX experience; in-depth Kubernetes proficiency; strong Linux/Unix internals knowledge; strong programming skills in Ruby, Go, Python, or Java; experience with Infrastructure as Code (Terraform, Ansible, Chef); and systems thinking across distributed systems.
