Senior Software Engineer, Core Experiences

Responsibilities Deliver medium complexity initiatives from technical discovery through delivery Create mobile Wikipedia product experiences for a global, multilingual audience across web and app surfaces Create RESTful APIs and scalable data pipelines to serve mobile and web client experiences Build software that is easy to test, observe, and debug Partner with product managers, designers, analysts, and native app engineers to shape pragmatic solutions Identify high-impact technical opportunities and risks and align the team on outcomes and capacity Comply with team standards in code review, technical design, testing, and documentation 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 Preferred Qualifications Experience adding webview-wrapped experiences to existing native mobile apps Experience launching and maintaining native or cross-platform mobile applications Experience building mobile games or interactive mobile experiences Experience with data science, machine learning, and/or AI Familiarity with Wikipedia, wikitext, markdown editing, or content management systems Experience leveraging agentic coding to scale engineering teams History of open source contributions Experience working in a fully remote, distributed team About the Company 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.