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Wikimedia Foundation Logo

Senior Software Engineer - Trust & Safety

Wikimedia Foundation

$141,352 - $175,725
Aug 29, 2025
Remote, US
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The Wikimedia Foundation is looking to solve the problem of abuse across Wikimedia projects by developing and maintaining tools that empower communities to identify, mitigate, and prevent various forms of abuse, while also protecting free access to information for everyone.

Requirements

  • 4+ years related professional experience
  • Experience building and maintaining large-scale applications
  • Proficiency in PHP, Javascript and relational databases
  • Strong foundation in security principles
  • Experience in driving cross-teams objectives
  • Experience in driving user and product impact
  • Familiarity with abuse fighting or security concerns

Responsibilities

  • Proactively develop and maintain tools that empower communities to identify, mitigate, and prevent various forms of abuse across Wikimedia projects.
  • Design privacy-conscious systems that detect behavioral patterns indicative of abuse while minimizing false positives and respecting user anonymity.
  • Continuously adapt abuse detection and mitigation strategies in response to changes in browser privacy standards, networking protocols, and platform architecture.
  • Collaborate cross-functionally with product managers, designers, and researchers to create holistic, human-centered solutions that balance safety and freedom.
  • 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.
  • Instrument and measure the impact of anti-abuse across Wikimedia projects.

Other

  • Bachelor's, master's, or doctorate degree in computer science, management information systems, or STEM field (or equivalent certification)
  • 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
  • Ability to work in a remote environment
  • Must be located in one of the countries where the Wikimedia Foundation is able to hire