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 Wikimedias 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.