Wikimedia Foundation - Senior Site Reliability Engineer

• 6+ years of experience in an SRE/Operations/DevOps role as part of a team • Experience with shell and any scripting languages used in an SRE context (Python, Go, Bash, Ruby; we primarily use Python) and configuration management tools (Puppet, Ansible; we use Puppet) • Experience with distributed caching systems, including their underlying algorithms and how to optimize their performance • A thorough, protocol-level understanding of TCP/IP, HTTP, TLS, and DNS • Experience with package management on Linux systems (we use Debian) • Strong Linux system-level troubleshooting skills • History of automating tasks and processes, identifying process gaps, and finding automation opportunities • Strong English language skills (verbal and written) and ability to work independently, as an effective part of a globally distributed team working across multiple time zones • Experience leading and participating in incident response and post-incident review rituals, with the goal of conducting root cause analysis and implementing preventive measures. • Experience with Linux kernel tuning for high-traffic loads • Experience with high-performance HTTP(S) caching-proxy software, such as HAProxy, Varnish (Vinyl), Apache Traffic Server, Envoy, or Nginx • Experience with the use, maintenance, and configuration of monitoring, metrics, and logging infrastructure (Prometheus, Grafana, etc.) • Developing/contributing to Free and Open Source software, or being part of an open-source community (share your favourite pull requests!) • Experience with LAMP stack technologies (PHP/HHVM, memcached/Redis) -- MediaWiki experience is a definite plus • Experience with defining cross-team SLOs and their implementation • The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and the other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge, and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects, build software experiences for reading, contributing, and sharing Wikimedia content, support the volunteer communities and partners who make Wikimedia possible, and advocate for policies that enable Wikimedia and free knowledge to thrive. • The Wikimedia Foundation is a charitable, not-for-profit organization that relies on donations. We receive donations from millions of individuals around the world, with an average donation of about $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. • News from across the Wikimedia movement • Wikimedia Blog • Wikimedia 2030