Careers at Wikimedia

Summary Wikipedia is a trusted source of knowledge the world over, read by over a billion people a month in over 300 languages. It’s offered for free and operated independently by the non-profit Wikimedia Foundation (that’s us), powered mainly by small donations. We are hiring a Senior Data Scientist to help guide Wikipedia’s anti-abuse and security strategy as a member of our Product Analytics team. In this role, you will inform our product development strategy by collaborating with product managers, engineers, and others to help our features and interventions make the impact they should. As the Senior Data Scientist, Safety & Security, you will partner closely with the Product Safety and Integrity team , whose strategy is built around bringing cutting-edge AI and machine learning techniques to bear on difficult problems in the field of safety and security. You will amplify the impact of the safety and security roadmap through creative data analysis, identifying the right metrics for the job, and developing data strategies that advance our product decisions. This role is an opportunity to be at the center of a pivotal time for Wikipedia, as AI changes how people access knowledge and presents new risks and opportunities in online safety and security. Examples of the kinds of projects you may work on include: Setting the strategy for how we measure the success of efforts to detect bots and inauthentic account activity ( sockpuppetry , in wiki terms). Providing analysis to inform the development of new heuristics and approaches to detect potentially abusive activity on the platform. Collaborating with research scientists and security engineers to develop and evaluate AI models to find malicious user-authored code. Please note that this role requires availability for critical meetings and synchronous collaboration between 13:00 and 19:00 UTC. You are responsible for: Serving as a strategic partner for product managers, engineers, designers, and other colleagues in product development teams. Proactively making recommendations on product direction and data strategy, surfacing insights and interpreting results. Timely delivery of accurate quantitative data and insights to inform strategy, guide product decisions, and assess the impact of product development work – balancing the need to operate in a fast-changing environment with appropriate rigor. Clearly communicating results and data-backed recommendations to stakeholders across different functions, ensuring understanding and guiding decision-making. Building and executing measurement strategy, evaluating experiments using Bayesian & Frequentist approaches, and performing quantitative research to inform product decisions. Developing queries & code to work with large-scale internal and external data repositories, using cutting-edge AI assistants, and tools such as Apache Iceberg, Hive, Druid, Presto, and Spark. Building automated, self-service dashboards for product teams that track success and health metrics using tools such as DBT, Airflow, and Superset. Helping product team members instrument features, perform data quality assurance, and use tools for running A/B tests. Demonstrating good judgment in prioritizing workload and selecting analytical methods and techniques. Skills and Experience: Experience with experimental design and statistics or machine learning methods. Experience using AI coding assistants for data analysis and other technical tasks. Fluency in R or Python, and common version control and command-line-based tools, for data analysis, statistical modeling, simulation, visualization, & reporting. Fluency in SQL and working with large scale data (we use tools like Hive, Presto, Druid, and Spark). Experience collaborating with product development teams in a fast-paced environment to test, analyze, and evaluate user-facing features for an online platform. Qualities that are important to us: Ability to explain data and insights clearly to non-specialist audiences and gain their understanding and confidence. Curiosity and critical thinking skills; a lifelong learner who sees situations through multiple lenses. Empathy towards and commitment to work with the Wikimedia volunteer communities. Discretion and competence in handling sensitive or confidential data. Commitment to the mission of the organization and our values and guiding principles . Self-motivated with an ability to navigate through ambiguity and complexity. The Wikimedia ecosystem is complex, resources are limited, and our guiding principles are ambitious. We want you to work to find solutions embracing these factors. Additionally, we’d love it if you have: Prior experience working in areas related to trust & safety, information security and privacy, or fraud and anti-abuse. Exposure to, and interest in, ethical data management and privacy practices. Contributed to Wikimedia projects or have experience working in other open source projects. Experience with Superset, Growthbook, or other open-source testing, data visualization, or reporting tools. 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 $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics. The Wikimedia Foundation is a remote-first organization with staff members including contractors based 40+ countries * . Salaries at the Wikimedia Foundation are set in a way that is competitive, equitable, and consistent with our values and culture. The anticipated annual pay range of this position for applicants based within the United States is US$ 109,563 to US$ 173,129 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) For US-based applicants: this position is part of the Communication Workers of America bargaining unit. 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. More information U.S. Benefits & Perks Applicant Privacy Policy Wikimedia Foundation What does the Wikimedia Foundation do? What makes Wikipedia different from social media platforms? Our Projects Our Tech Stack News from across the Wikimedia movement Wikimedia Blog Wikimedia 2030

Summary The Wikimedia Foundation (WMF) is looking for an experienced Software Quality Manager to lead two teams who are providing testing & documentation services to multiple WMF engineering teams while fostering a culture where Software Quality & Documentation is everyone’s responsibility. This role supports geographically distributed teams of 5-10 Test Engineers & 3 Technical Writers who are providing services that improve the quality of our software. They engage with multiple WMF teams in high-impact initiatives to provide technical documentation, automated test suites, and manual testing for the software that runs Wikipedia and its sister projects. We’re committed to making knowledge available to everyone globally. This is an opportunity to do good while empowering the current and future generations of developers across the globe to build high-quality and well-documented software that scales with our mission. Our team provides services that enable our staff & communities to achieve our Vision: a world in which every single human being can freely share in the sum of all knowledge. The Wikimedia Foundation values diversity and recognizes that employees from a broad range of perspectives are essential to creating a knowledge source that benefits everyone. We are committed to inclusion, diversifying tech, and advocating for diversity in our employees, their experiences, and the people we serve. You are responsible for: Collaborating with multiple teams and cross-functional stakeholders to align on testing and documentation needs while balancing project goals with technical requirements and team skill sets. Driving execution–ensuring SLAs are met, key performance metrics are being tracked, and work is being actively unblocked. Expanding and refining automated processes and supporting teams in adopting best practices that improve software quality and technical documentation Promoting a mindset of quality and documentation-first practices across the engineering teams. Oversee the design, implementation, and maintenance of automated test suites, manual testing practices and technical documentation. Ensuring both teams are engaged and productive, and understands the big picture of the different projects they contribute to and how their efforts contribute to it. Coaching your team, conducting performance reviews, providing career guidance, and building a professional and inclusive work culture. Skills and Experience: Demonstrated engineering experience in a technical management or leadership role. Strong hands-on experience developing, designing, and reviewing software applications using languages such as Go, Python, PHP, or other object-oriented programming languages. Proven track record of managing a team that provides critical centralized services (such as quality assurance, technical documentation or technical program management) to various product teams. Experience managing the expectations of diverse teams with varying goals, ensuring that your service team prioritizes tasks effectively and delivers value across the organization. Excellent verbal and written communication skills in English, with the ability to articulate complex technical topics and solutions clearly and concisely. An established track record and prior success in working with a multicultural, remote and distributed high-performing team. Qualities that are important to us: Alignment with our mission and values. Experience with open source development methodologies and open source community. Technical background in either manual and automated testing or technical documentation writing Strong ability to identify and implement strategies that improve testing and documentation practices, ensuring they scale with the organization’s needs. Excellent communication and follow-up skills. You’re actively engaged, and your team feels involved and well-informed about what’s happening in the team and broader organization. Experience with remote work and the level of engagement and communication it takes to build a geographically distributed team that is functional and healthy. Experience with large-scale, global developer ecosystems a nd platforms and managing the risks and opportunities associated with them. Resilience—we work on new and interesting problems in public and collaborative ways. Working together for outcomes, and being willing to change course. Passionate about developing people and platforms, with a focus on fostering a strong product-minded culture. Additionally, we’d love it if you have: Knowledge of testing automation tools for E2E and Visual Regression Knowledge of documentation as code tools such as Markdown Experience in transitioning Test Engineers from manual testing towards automation Experience editing Wikipedia or with the Wikipedia, Wikidata, or Wikimedia Commons communities or other collaborative enterprises. Familiarity with MediaWiki. 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 $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics. The Wikimedia Foundation is a remote-first organization with staff members including contractors based 40+ countries * . Salaries at the Wikimedia Foundation are set in a way that is competitive, equitable, and consistent with our values and culture. The anticipated annual pay range of this position for applicants based within the United States is US$ 129,193 to US$ 202,962 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. More information U.S. Benefits & Perks Applicant Privacy Policy Wikimedia Foundation What does the Wikimedia Foundation do? What makes Wikipedia different from social media platforms? Our Projects Our Tech Stack News from across the Wikimedia movement Wikimedia Blog Wikimedia 2030

Summary The Wikimedia Foundation is looking for a full stack Senior Software web Engineer contractor to join the App Growth team within the Core Experiences engineering on a 3-month full time contract. This is not a native iOS or Android role. It is focused on web-first product experiences, APIs, and platform integrations that can be reused across mobile web and native app surfaces; to help us scale features across platforms and create compelling features that deepen reader engagement and increase user retention. You will build features that create natural handoffs between web and app and landing users in exactly the right place — for example, prompting a reader to try a personalized reading list in the app, creating a game that is integrated within the apps as a webview; or when someone tries to edit there is a smooth hand off to the web editing experience. Important: We are a fully remote team at a global organization. To ensure there are enough opportunities to communicate, this role needs at least four hours of your work day to occur between 15:00 UTC and 21:00 UTC. You are responsible for: Delivery and enablement - Delivery of medium complexity initiatives from technical discovery through delivery. Breaks down initiatives into features, drive estimation and manage scope. Identifies risks early, and helps the team make pragmatic tradeoffs across quality, velocity, maintainability, and user impact. Frontend Implementation - Create mobile Wikipedia product experiences that serve a global, multilingual audience across web and app surfaces. You can design and build accessible, adaptable, scalable and reusable components. Backend Implementation - Creating RESTful APIs, from schema and contract design through to monitoring and iteration, to serve simple but scalable data pipelines to mobile and web client experiences at scale. Ensures pipelines and APIs remain simple to consume, reliable to operate, and straightforward to evolve over time. Quality, testing and observability - Consistently builds software that is easy to test, observe and debug. Instruments features that enable deeper analysis by Product Analysts. Cross-functional collaboration - Partners with product managers, designers, analysts, and native app engineers to shape pragmatic solutions that balance user needs, technical constraints, platform expectations, and delivery timelines. Prioritization - Proactively identifies high-impact technical opportunities and risks across the engagement timeframe, works with the team to clarify priorities and sequencing. Actively keeps the team aligned on outcomes, capacity, and shared goals. Culture and standards - Complies with team standards in code review, technical design, testing, documentation, accessibility, observability, and decision-making - fostering transparency, empathy, and collaboration. Operational Awareness - Plans work with awareness of downstream or upstream effects. Qualities that are important to us: Clear communicator - You can explain your ideas simply and adapt your communication to different audiences across engineering, product, and non-technical audiences in both synchronous and asynchronous channels. Autonomy - Operates with high autonomy in a team setting and cross-team settings. You own your work end-to-end and practice a culture of responsibility and follow-through. Feedback - You give and receive feedback with curiosity and empathy. Helps others resolve misunderstandings productively. Builds strong relationships - Proactively brings the right people into discussions, identifies process improvements. Comfortable with ambiguity - You are comfortable with ambiguity and can collaborate to solve complex problems with pragmatic solutions. Connects ideas and can regularly balance trade-offs across related domains to create well-rounded solutions. Knowledge sharing - Strong knowledge-sharing practices, documents work for handover and consistently helps others understand and apply shared knowledge. You enjoy working with others to solve problems and are open to feedback. You inspire trust and progress through support, example, and thoughtful contributions. Outcome-oriented - You prioritise work that delivers value to users and aligns with organizational goals.You balance ideal solutions with the constraints of legacy, user expectations and delivery needs. Requirements: Bachelor's and 5-10+ years related professional experience with significant experience building production web applications and services. Strong professional experience with JavaScript/TypeScript, JavaScript frameworks such as Vue.js, and backend languages such as PHP. Experience building responsive or mobile-first web experiences, with attention to performance, accessibility, and usability. Experience in designing and integrating with server-side APIs. Experience delivering in a self-driven, lean environment. Commitment to the Foundation's Mission and Values. Additionally, we’d love it if you have: Experience adding webview-wrapped experiences to existing native mobile apps (iOS or Android). Experience in launching and maintaining native or cross-platform mobile applications (iOS or Android). Experience building mobile games or other interactive mobile experiences. Experience with data science, machine learning, and/or AI (e.g., familiarity with prompt engineering, Jupyter notebooks experience, etc.). Familiarity with Wikipedia / wikitext / markdown editing or content management systems (e.g., MediaWiki, Drupal, WordPress). Experience leveraging agentic coding to scale the work of small engineering teams. Bachelor's, master's, or doctorate degree in computer science, management information systems, or STEM field (or equivalent certification). Prior experience with MediaWiki or Wikimedia projects. A history of open source contributions. Experience working in a fully remote, distributed team. 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 $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics. The Wikimedia Foundation is a remote-first organization with staff members including contractors based 40+ countries * . Salaries at the Wikimedia Foundation are set in a way that is competitive, equitable, and consistent with our values and culture. The anticipated annual pay range of this position for applicants based within the United States is US$ 56.07 to US$ 87.13 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. More information Applicant Privacy Policy Wikimedia Foundation What does the Wikimedia Foundation do? What makes Wikipedia different from social media platforms? Our Projects Our Tech Stack News from across the Wikimedia movement Wikimedia Blog Wikimedia 2030

Summary The Wikimedia Foundation is looking for a Senior Software Engineer, iOS to join the App Growth team within the Core Experiences engineering group on a 3-month full time contract. The App Growth team has a clear and ambitious goal: make the apps the destination for knowledge lovers and grow our active readership. The team owns the cross-platform feature framework for the app, making decisions about where a feature lives when the app is the destination and where its primary value is unlocked. Important: We are a fully remote team at a global organization. To ensure there are enough opportunities to communicate, this role needs at least four hours of your work day to occur between 14:00 UTC and 21:00 UTC. You are responsible for: Delivery and enablement - Delivery of medium complexity initiatives from technical discovery through delivery. Breaks down initiatives into features, drive estimation and manage scope. Identifies risks early, and helps the team make pragmatic tradeoffs across quality, velocity, maintainability, and user impact. Implementation - Improving the mobile Wikipedia product experiences that serve a global, multilingual audience on iOS. Leads system design for medium-sized projects and can design and build accessible, adaptable, scalable components. Quality, testing and observability - Consistently builds software that is easy to test, observe and debug. Instruments features that enable deeper analysis by Product Analysts. Cross-functional collaboration - Partners with product managers, designers, analysts, and native app engineers to shape pragmatic solutions that balance user needs, technical constraints, platform expectations, and delivery timelines. Prioritization - Proactively identifies high-impact technical opportunities and risks across the engagement timeframe, works with the team to clarify priorities and sequencing. Actively keeps the team aligned on outcomes, capacity, and shared goals. Culture and standards - Complies with team standards in code review, technical design, testing, documentation, accessibility, observability, and decision-making - fostering transparency, empathy, and collaboration. Operational Awareness - Plans work with awareness of downstream or upstream effects. Qualities that are important to us: Clear communicator - You can explain your ideas simply and adapt your communication to different audiences across engineering, product, and non-technical audiences in both synchronous and asynchronous channels. Autonomy - Operates with high autonomy in a team setting and cross-team settings. You own your work end-to-end and practice a culture of responsibility and follow-through. Feedback - You give and receive feedback with curiosity and empathy. Helps others resolve misunderstandings productively. Builds strong relationships - Proactively brings the right people into discussions, identifies process improvements. Comfortable with ambiguity - You are comfortable with ambiguity and can collaborate to solve complex problems with pragmatic solutions. Connects ideas and can regularly balance trade-offs across related domains to create well-rounded solutions. Knowledge sharing - Strong knowledge-sharing practices, documents work for handover and consistently helps others understand and apply shared knowledge. You enjoy working with others to solve problems and are open to feedback. You inspire trust and progress through support, example, and thoughtful contributions. Outcome-oriented - You prioritize work that delivers value to users and aligns with organizational goals.You balance ideal solutions with the constraints of legacy, user expectations and delivery needs. Requirements: Bachelor's and 5-10+ years related professional experience with significant experience building iOS applications. Strong professional experience and proficiency with Swift, SwiftUI, UIKit, and familiarity with architectural patterns in iOS. Experience of iOS performance optimisation techniques to ensure smooth, responsive, and high-performing applications under a variety of conditions. Experience working in a self-driven, lean environment. Commitment to the Foundation's Mission and Values. Additionally, we’d love it if you have: Experience adding webview-wrapped experiences to existing native mobile apps (iOS or Android). Experience in maintaining cross-platform mobile applications. Experience building mobile games or other interactive mobile experiences. Experience with data science, machine learning, and/or AI (e.g., familiarity with prompt engineering, Jupyter notebooks experience, etc.). Familiarity with Wikipedia / wikitext / markdown editing or content management systems (e.g., MediaWiki, Drupal, WordPress). Experience with leveraging agentic coding to scale the work of small engineering teams. Bachelor's, master's, or doctorate degree in computer science, management information systems, or STEM field (or equivalent certification). Prior experience with MediaWiki or Wikimedia projects. 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 $15. We also receive donations through institutional grants and gifts. The Wikimedia Foundation is a United States 501(c)(3) tax-exempt organization with offices in San Francisco, California, USA. As an equal opportunity employer, the Wikimedia Foundation values having a diverse workforce and continuously strives to maintain an inclusive and equitable workplace. We encourage people with a diverse range of backgrounds to apply. We do not discriminate against any person based upon their race, traits historically associated with race, religion, color, national origin, sex, pregnancy or related medical conditions, parental status, sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as an individual with a disability, genetic information, or any other legally protected characteristics. The Wikimedia Foundation is a remote-first organization with staff members including contractors based 40+ countries * . Salaries at the Wikimedia Foundation are set in a way that is competitive, equitable, and consistent with our values and culture. The anticipated annual pay range of this position for applicants based within the United States is US$ 56.07 to US$ 87.13 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. More information Applicant Privacy Policy Wikimedia Foundation What does the Wikimedia Foundation do? What makes Wikipedia different from social media platforms? Our Projects Our Tech Stack News from across the Wikimedia movement Wikimedia Blog Wikimedia 2030

Senior Software Engineer, MediaWiki Content Platform Team Summary The Wikimedia Foundation is looking for a software engineer to join our team, reporting to engineering management. As a software engineer, you will be responsible for engineering software that supports our product user experiences. In this role, you will work in a fully-remote environment (with occasional travel for team, department, or organization events), where we value teamwork and a consensus-oriented approach. You get to write open source code for collaborative experiences supporting well over half a billion pages accessed per day, and you get to do it at a place that believes we're all more successful when everyone has a good work-life balance. On the Content Platform team, we work to support and evolve all things wikitext , the markup language behind Wikipedia. We aim to make wikitext easier to write, faster to parse, and less error-prone for humans. We also strive to support editing and content analysis tools with structured representations. We also maintain the web services associated with content rendering and transformation. 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 GMT-4 to GMT+2. You are responsible for: Designing and delivering improvements to Wikipedia's wikitext processing infrastructure, balancing user experience, performance, backwards compatibility, and maintainability Iterating on new features through collaboration with fellow engineers, product managers, designers, client teams, and community members Writing PHP and JavaScript which supports hundreds of world languages Creating and maintaining internet APIs with server scripting languages Instrumenting components to monitor feature and quality characteristics Leveraging caching and persistence technologies Skills and experience: 5+ years of related professional experience in software engineering Experience with one or more of: parser generators, interpreters, language runtimes, compilers, or bringing a language feature through a product cycle Demonstrated ability to own complex technical projects from problem definition through implementation and delivery, including making and communicating architectural decisions and navigating ambiguity Experience designing and maintaining reliable, performant software components used by other teams, products, or large numbers of users Strong engineering practices: you enjoy writing unit and integration tests, proactively addressing security and code review feedback, and balancing architectural tradeoffs Ability to work effectively across team and organizational boundaries, identify and resolve technical dependencies, and bring projects to completion with limited direction Experience mentoring other engineers and raising the technical quality of a team, through code reviews, design discussions, documentation, or direct mentorship Qualities that are important to us: A desire to make meaningful contributions to knowledge equity, free culture, and open access An emphasis on communicating clearly in both synchronous and asynchronous channels Self motivated with an ability to navigate through ambiguity and bring a project to completion with limited direction Additionally, we'd love it if you have this: Familiarity with the HTML5 spec and DOM manipulation Expertise in Node.js and related technologies Familiarity with Wikipedia/wikitext/markdown editing or content management systems (e.g., MediaWiki, Drupal, WordPress). We grow and care for MediaWiki and Wikimedia specific services. MediaWiki is an open source, PHP, MySQL, and JavaScript web application that powers Wikipedia and other Wikimedia Foundation websites. It has been incrementally developed for many years to become a richly featured wiki engine and the basis for hundreds of extensions and skins, and has a vibrant volunteer community. A history of open source contribution Bachelor's, master's, or doctorate degree in computer science, software engineering, or other STEM field (or equivalent certification) 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$116,633 to US$181,243 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) For US-based applicants: this position is part of the Communication Workers of America bargaining unit. 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. More information U.S. Benefits & Perks Applicant Privacy Policy Wikimedia Foundation What does the Wikimedia Foundation do? 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