Software Engineer, MediaWiki Interfaces

Recruiter at Wikimedia Foundation | We're hiring! 🌎

The Wikimedia Foundation is looking for a Software Engineer to join the Media Wiki Interfaces team. Media Wiki is the open‑source platform that powers Wikipedia and its sister projects – impacting hundreds of millions of users worldwide. This team owns the web API and other integration interfaces of Media Wiki, enabling other teams to create features that allow users to access, edit, and consume knowledge efficiently and reliably.

The Media Wiki page has more information on the kind of work the group undertakes. This role offers a chance to work on large‑scale, mission‑driven software while deepening your technical expertise and contributing to systems used globally. You’ll collaborate with other engineers and product managers to improve performance, reliability and the responsible adoption of our APIs. Important:
We are a fully remote team. Your working hours will need to overlap with UTC‑4 to UTC+2 time zones to best accommodate members of your team around the world.

• Designing, developing, and maintaining key parts of the Media Wiki stack
• Writing clean, well‑documented, and maintainable code
• Participating in code reviews, design discussions, and technical planning
• Investigating and resolving production issues with support from other engineers
• Contributing to the adoption and advocacy of API‑first development, and influencing best practices in system design, SLOs/SLAs, and OpenAPI Specification
• Contributing to improving observability (metrics, logging, monitoring) and reliability of our systems
• Collaborating with the Product team and the Wikimedia community to ensure technical solutions meet user needs
• Working with other engineers to improve the development workflow

• Clear communicator – can explain ideas simply and adapt communication to different audiences
• Outcome‑oriented – prioritizes work that delivers value to users and aligns with organizational goals, breaking it into manageable steps to deliver incremental value
• Accountable – owns work end‑to‑end and helps establish a culture of responsibility and follow‑through
• Candid and respectful – offers feedback directly, constructively, and with care; invites the same in return; supports growth by challenging ideas, not people
• Collaborative – enjoys working with others to solve problems and is open to feedback

• Commitment to the Foundation's Mission and Values
• Bachelor's + 2 years of related experience or equivalent work experience
• Proficiency in PHP and JavaScript, or willingness to learn and work with both
• Understanding of HTTP and web application architecture
• Familiarity with observability and testing practices

• Experience contributing to open‑source software
• Familiarity with Media Wiki
• Experience working in a remote, distributed team
• Interest in API‑first development or improving developer experience
• Professional experience in large‑scale web platforms

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.