Senior Site Reliability Engineer – Wikimedia Enterprise

About the role

We are looking for a Senior Site Reliability Engineer to join Wikimedia Enterprise in Luxembourg. You will work on large‑scale API and data infrastructure that powers the global reuse of Wikimedia content, ensuring high availability, performance, and reliability.

Key responsibilities

• Define, track, and improve SLOs, SLIs, and error budgets for critical services.
• Design and enhance observability systems, including metrics, logging, and distributed tracing.
• Participate in incident response, on‑call rotations, and post‑incident reviews.
• Build and maintain CI/CD and GitOps pipelines for secure, automated deployments.
• Implement infrastructure‑as‑code using Terraform, Ansible, or similar tools.
• Design, operate, and scale cloud infrastructure across production environments.
• Drive capacity planning, performance optimization, and resilience testing, including chaos engineering.
• Collaborate with security, software, and release engineering teams to embed reliability best practices.

Required profile

• 5+ years of experience in SRE, DevOps, or infrastructure engineering.
• Strong expertise in distributed systems and cloud environments.
• Proactive, collaborative mindset with a focus on automation and continuous improvement.

Required skills

• Terraform
• Ansible
• Python
• Go
• CI/CD pipeline development
• GitOps practices
• Observability tooling (metrics, logging, tracing)
• Chaos engineering concepts