Software Engineer III, Product Safety & Integrity
Wikimedia FoundationAbout the role
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Wikimedia Foundation
Posted on
Sep 15, 2026
Software Engineer III, Product Safety & Integrity
New York
Mid-Senior level
Engineering
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Wikimedia Foundation
Wikimedia Foundation
wikimediafoundation.org
251-1000
Computer Software
The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and the other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge, and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects, build software experiences for reading, contributing, and sharing Wikimedia content, support the volunteer communities and partners who make Wikimedia possible, and advocate for policies that enable Wikimedia and free knowledge to thrive.
The Wikimedia Foundation is a charitable, not-for-profit organization that relies on donations. We receive donations from millions of individuals around the world, with an average donation of about $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA.
Job Description
The Wikimedia Foundation is looking for a software engineer to join the Product Safety and Integrity Team. Engineers at the Wikimedia Foundation get to work on technology that truly makes a global impact — powering Wikipedia and its sister projects, which serve billions of pageviews every month across hundreds of languages. It is a rare opportunity to contribute to one of the largest knowledge-sharing platforms in the world, and to help protect free access to information for everyone, everywhere.
In this role, you will work in a mostly-remote environment. To ensure there are enough opportunities to communicate, the preferred timezone for this candidate will be UTC - UTC+3.
As a software engineer, you will work closely with the team to:
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.
Skills And Experience
1+ years related professional experience
Experience building and maintaining large-scale applications
Proficiency in PHP, Javascript or similar
Proficiency in relational databases
Strong foundation in security principles
Experience in driving cross-team objectives
Experience in driving user and product impact
Qualities That Are Important To Us
Collaboration, humility, and a shared commitment to Wikimedia’s vision of free knowledge for all which guides everything we build
Communicate with clarity and empathy, both in synchronous and asynchronous settings
Additionally, We'd Love It If You Have
Familiarity with abuse fighting or security concerns
A history of open source contributions
About The Wikimedia Foundation
The Wikimedia Foundation is the nonprofit organization that operates Wikipedia and the other Wikimedia free knowledge projects. Our vision is a world in which every single human can freely share in the sum of all knowledge. We believe that everyone has the potential to contribute something to our shared knowledge, and that everyone should be able to access that knowledge freely. We host Wikipedia and the Wikimedia projects, build software experiences for reading, contributing, and sharing Wikimedia content, support the volunteer communities and partners who make Wikimedia possible, and advocate for policies that enable Wikimedia and free knowledge to thrive.
The Wikimedia Foundation is a charitable, not-for-profit organization that relies on donations. We receive donations from millions of individuals around the world, with an average donation of about $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA.
As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics.
The Wikimedia Foundation is a remote-first organization with staff members including contractors based 40+ countries*. Salaries at the Wikimedia Foundation are set in a way that is competitive, equitable, and consistent with our values and culture. The anticipated annual pay range of this position for applicants based within the United States is US$92,267 to US$144,201 with multiple individualized factors, including cost of living in the location, being the determinants of the offered pay. For applicants located outside of the US, the pay range will be adjusted to the country of hire. We neither ask for nor take into consideration the salary history of applicants. The compensation for a successful applicant will be based on their skills, experience and location.
Please note that we are currently able to hire in the following:
US States: Arizona, California, Colorado, Connecticut, District of Columbia*, Florida, Georgia, Idaho, Illinois, Indiana, Iowa, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico*, Rhode Island, Tennessee, Texas, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin and Wyoming (*US Territory or Federal District)
Countries: Brazil, Canada, Colombia, Germany, Ghana, India, Indonesia, Italy, Kenya*, Mexico, Morocco, Netherlands, Poland, Singapore*, South Africa, Spain, Switzerland and the United Kingdom. Our non-US employees are hired through a local third party Employer of Record (EOR) and must have current work authorization in their location. (*citizens/permanent residents only)
We periodically review this list to streamline to ensure alignment with our hiring requirements.
All applicants can reach out to their recruiter to understand more about the specific pay range for their location during the interview process.
If you are a qualified applicant requiring assistance or an accommodation to complete any step of the application process due to a disability, you may contact us at recruiting@wikimedia.org or +1 (415) 839-6885.
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Responsibilities
- Develop and maintain tools to identify, mitigate, and prevent abuse across Wikimedia projects
- Design privacy-conscious systems to detect behavioral patterns indicative of abuse
- Adapt abuse detection strategies in response to changes in privacy standards
- Collaborate with product managers, designers, and researchers for holistic solutions
- Write resilient, maintainable systems and high-quality code
- Implement observability to maintain quality and system stability
- Measure the impact of anti-abuse across Wikimedia projects
Qualifications
- 1+ years related professional experience
- Experience building and maintaining large-scale applications
- Proficiency in PHP, Javascript or similar
- Proficiency in relational databases
- Strong foundation in security principles
- Experience in driving cross-team objectives
- Experience in driving user and product impact
Skills mentioned
About Wikimedia Foundation
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H-1B sponsorship history
Historical employer filing data was found for Wikimedia Foundation. The employer record includes 15 historical certified applications. This is employer-level history, not a guarantee that this role currently offers sponsorship.