Senior Software Engineer - Trust & Safety (Remote)

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Job Summary:

The Wikimedia Foundation is a nonprofit organization that operates Wikipedia and other free knowledge projects. They are seeking a Senior Software Engineer to join the Product Safety and Integrity Team, where the engineer will develop tools to combat abuse, design privacy-conscious systems, and collaborate with cross-functional teams to create solutions that balance safety and freedom.

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.

Qualifications:

Required:

• 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

• 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

Preferred:

• Familiarity with abuse fighting or security concerns

• A history of open source contributions

• Familiarity with editing Wikipedia, Wikitext, Markdown, or using content management systems (e.g., MediaWiki, Drupal, WordPress)

• Bachelor's, master's, or doctorate degree in computer science, management information systems, or STEM field (or equivalent certification)

Company:

Wikimedia Foundation encourages the development and distribution of free educational content with projects such as Wikipedia. Founded in 2003, the company is headquartered in San Francisco, California, USA, with a team of 501-1000 employees. The company is currently Late Stage. Wikimedia Foundation has a track record of offering H1B sponsorships.