Senior Software Engineer

Summary

Join the Wikimedia Foundation's Product Safety and Integrity Team as a Senior Software Engineer and work in a mostly-remote environment. You will develop and maintain tools to combat abuse across Wikimedia projects, design privacy-conscious systems for abuse detection, adapt strategies to evolving technologies, collaborate with cross-functional teams, write high-quality code, and implement observability for system stability. This role offers a unique opportunity to contribute to a global platform and protect free access to information. The Wikimedia Foundation values teamwork, collaboration, and a commitment to free knowledge. The position requires 4+ years of relevant experience and proficiency in PHP, Javascript, and relational databases. A bachelor's or equivalent degree is also required.

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

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

Preferred Qualifications

• 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)

Benefits

Remote work, flexible hours