Hybrid Principal Site Reliability Engineer

at Zefr

• Job title: Principal Site Reliability Engineer
• Job type: Full Time
• Experience level: Lead
• Salary: $210,000 - $235,000 per year
• Degree requirement: Bachelor's Degree
• Tech skills: AWS, Cloud, Distributed Systems, Flux, Google Cloud Platform, Grafana, Kubernetes, Prometheus, Terraform
• Location requirements: Hybrid, Marina del Rey, United States

About the role

• Principal Site Reliability Engineer at Zefr enhancing cloud infrastructure and driving reliability practices in a leading technology company.

Responsibilities

• Support and build systems and tools that enable other engineers to generate, deploy, and manage product features and models both quickly and safely.
• Deploy and support a multi-cloud, micro-service architecture, including infrastructure tailored for ML workloads, deployed via Github Actions, ArgoCD & Kubernetes.
• Collaborate with other engineers to architect secure, resilient, scalable, and cost-efficient applications and ML systems/pipelines in AWS and GCP.
• Foster and push our DevOps culture and philosophy by encouraging continuous improvement across all engineering teams.
• Proactively maintain the health of production environments, including monitoring application performance and resource utilization.
• Participate in 24/7 on-call rotation, respond to system performance issues and outages.
• Debug code at the application and infrastructure level.
• Mature our CI/CD workflows and release process.
• Maintains a forward-thinking approach, actively researching and proposing new solutions.
• Propose and review Engineering Request for Comments (RFC) to drive Engineering architecture and practices.

Requirements

• 10+ year job history designing, managing, deploying, and supporting Cloud Infrastructure in a production environment using major public cloud providers (GCP experience a huge bonus)
• Experience in Advertising or AdTech
• Demonstrated technical leadership experience; including mentoring engineers, driving cross-functional projects, and influencing architectural decisions at an organizational level.
• Knowledge of GitOps including an understanding of modern CI/CD pipelines, techniques and technologies (Github Actions, GitLab, CircleCI, Argo CD, Flux)
• Advanced Proficiency with IaC and configuration management tools (Terraform, Terragrunt, OpenTofu, Crossplane, Pulumi)
• Deep production experience architecting, managing, deploying, and supporting container based workloads into Kubernetes clusters
• Proven track record of building and scaling reliability practices, including SLO/SLI frameworks, incident management, and capacity planning.
• Heavy Production experience with observability platforms and practices (Prometheus, Grafana, Chronosphere, Datadog, OpenTelemetry); ability to design monitoring strategies for complex distributed systems.
• Strong knowledge of cloud networking (Mesh, NAT, Load Balancers, API Gateways, proxies, etc), cloud security, and cost optimization strategies.
• Exceptional written and verbal communication skills; ability to translate complex technical concepts for diverse audiences and build consensus across teams.
• Experience authoring technical strategy documents, RFCs, and architectural proposals.

Benefits

• Flexible PTO
• Medical, dental, and vision insurance with FSA options
• Company-paid life insurance
• Paid parental leave
• 401(k) with company match
• Professional development opportunities
• 13 paid holidays off
• Summer Fridays (we leave early)
• In-office, hybrid, and fully-remote work options available
• In-office lunches and lots of free food
• Optional in-person and virtual events (we like to celebrate!)