Senior Site Reliability Engineer

Responsibilities

• Define, track, and improve Service Level Objectives (SLOs), SLIs, and error budgets
• Build and enhance observability systems including metrics, logs, and distributed tracing
• Drive reliability engineering practices such as capacity planning, load testing, and chaos testing
• Improve developer experience by enabling self-service infrastructure and streamlining deployment workflows
• Design, implement, and optimize CI/CD and GitOps workflows using tools like GitLab and ArgoCD
• Implement secure-by-default infrastructure and enforce best practices for IAM and secrets management
• Optimize infrastructure cost and efficiency using FinOps principles
• Reduce operational toil through automation-first solutions
• Mentor peers in technical and operational areas

Requirements

• Experience with Infrastructure as Code and automation tools like Terraform or Ansible
• Proficiency in at least one programming language such as Python or Go
• Experience designing and operating cloud-based systems on AWS, Azure, or GCP
• Experience building CI/CD pipelines and GitOps workflows
• Experience with incident response, on-call practices, and leading postmortems
• Strong understanding of SRE principles including SLOs, SLIs, and error budgets
• Experience with observability tools like Prometheus or OpenTelemetry
• Proven experience operating large-scale distributed systems

Preferred Qualifications

• Experience managing event streaming platforms like Kafka or Kinesis
• Familiarity with data lake architectures and frameworks like Iceberg, Flink, or Spark
• Experience with continuous profiling and performance optimization tools
• Experience contributing to open source projects
• Prior participation in the Wikimedia movement

About the Company

The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and other free knowledge projects. Wikimedia Enterprise is a revenue-generating product providing reliable data ingestion for organizations to repurpose Wikimedia content.