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Wikimedia Foundation Logo

Staff Software Engineer, Infrastructure

Wikimedia Foundation

$134,133 - $208,254
Aug 26, 2025
San Francisco, CA, US
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The Wikimedia Foundation is looking for a staff software engineer to work on various infrastructure projects to power Wikipedia and its sister projects, which serve billions of pageviews every month across hundreds of languages.

Requirements

  • Experience building and maintaining large-scale applications
  • Proficiency in PHP, Javascript and relational databases
  • A history of open source contributions
  • Familiarity with editing Wikipedia, Wikitext, Markdown, or using content management systems (e.g., MediaWiki, Drupal, WordPress)

Responsibilities

  • Build new infrastructure capabilities into MediaWiki.
  • Profile, refactor, and optimize various parts of the infrastructure to enable the development of new tools and to empower more feature development teams.
  • Maintain pieces of infrastructure software.
  • Write resilient, maintainable systems and high-quality code with a focus on long-term sustainability.
  • Implement observability to maintain high levels of quality and system stability.

Other

  • 8+ years related professional experience
  • Experience in driving cross-teams objectives
  • Experience in driving user and product impact
  • Collaboration, humility, and a shared commitment to Wikimedia's vision of free knowledge for all guide everything we build
  • Communicate with clarity and empathy, both in synchronous and asynchronous settings.