Software Engineer

Remote - San Francisco, CA


We are looking for developers to help us build software that empowers and changes the world. The Wikimedia Foundation is hiring a full-time Software Engineer to join the Core Platform Team. The Core Platform Team is responsible for the development and maintenance of the MediaWiki Platform and the suite of core services that power the Wikipedia project and enable millions of people to share knowledge every day.

As an engineer on our team, you will be responsible for developing services, new features, and making critical changes to our software that enable client developers to deliver new knowledge experiences to users around the world. You will also work on making our software scalable and sustainable as we expand our projects into new countries, projects and languages.

Your primary development language will be PHP - the language of MediaWiki Platform which has been continuously developed over the past 15 years in collaboration with a vibrant volunteer community. You will also develop in Node.js, which is our language of choice for our new services which enable us to scale our software even further. During your day, you will work with other Engineers to develop features and review code, Product Managers to collaboratively define your projects, Release Engineers to ship your code, and Site Reliability Engineers to operate your work in production.

The Core Platform Team is an experienced group of engineers that welcomes new members who are excited to learn and develop. We are committed to helping our individual members broaden and deepen their skill sets as well as helping to advise on and chart career development paths.

Are you ready to write open source code that helps to create “a world in which everyone can freely share in the sum of all knowledge”, provides value in people’s lives, and happens to power one of the most popular web destinations in the world? We are a family-friendly and remote-friendly employer and have a great benefits package. We look forward to your application.


  • Design, develop, test, and deploy new features and improvements to MediaWiki and our core services
  • Triage, diagnose, and fix reported bugs
  • Create new REST APIs to access new capabilities
  • Refactor and migrate features to new architectures
  • Partner with Foundation staff and volunteers on software design, development, review, testing and evaluation.
  • Help identify and implement best practices in engineering processes across the team.
  • Work and communicate effectively within a small team distributed across multiple time zones.


  • BS in Computer Science or a related field, or 1 year software development experience
  • Familiarity with a programming language and environment. Preferably PHP or Node.js
  • A scientific mindset to empirically test your hypotheses
  • Motivation, passion and desire to learn new skills and technology and grow into valued contributor on our team


  • Code samples which you can show us
  • Experience with Unix, Memcached, content distribution networks
  • Familiarity with a database technology, preferably MySQL or Cassandra
  • Experience developing libraries and working with package management system (Composer, npm, etc…)
  • Familiarity with web protocols and standards such as HTML, CSS, HTTP, and REST
  • Experience contributing to open source projects
  • Experience with MediaWiki or Wikimedia projects

The Wikimedia Foundation is... 

...the nonprofit organization that hosts and 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, free of interference. We host 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 financial support 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.

The Wikimedia Foundation is an equal opportunity employer, and we encourage people with a diverse range of backgrounds to apply

U.S. Benefits & Perks*

  • Fully paid medical, dental and vision coverage for employees and their eligible families (yes, fully paid premiums!)
  • The Wellness Program provides reimbursement for mind, body and soul activities such as fitness memberships, baby sitting, continuing education and much more
  • The 401(k) retirement plan offers matched contributions at 4% of annual salary
  • Flexible and generous time off - vacation, sick and volunteer days, plus 19 paid holidays - including the last week of the year.
  • Family friendly! 100% paid new parent leave for seven weeks plus an additional five weeks for pregnancy, flexible options to phase back in after leave, fully equipped lactation room.
  • For those emergency moments - long and short term disability, life insurance (2x salary) and an employee assistance program
  • Pre-tax savings plans for health care, child care, elder care, public transportation and parking expenses
  • Telecommuting and flexible work schedules available
  • Appropriate fuel for thinking and coding (aka, a pantry full of treats) and monthly massages to help staff relax
  • Great colleagues - diverse staff and contractors speaking dozens of languages from around the world, fantastic intellectual discourse, mission-driven and intensely passionate people

*Eligible international workers' benefits are specific to their location and dependent on their employer of record

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