[Hiring] Senior Software Engineer, Core Experiences @Wikimedia Foundation

Role Description

The Wikimedia Foundation is looking for a Senior Software Engineer to join the App Growth team within the Core Experiences engineering group. The App Growth team has a clear and ambitious goal: make the apps the destination for knowledge lovers and grow our active readership.

As a web full stack Senior Software Engineer supporting the Mobile Apps teams, you will build features that create natural handoffs from the web to the app, landing users in exactly the right place. This role is focused on web-first product experiences, APIs, and platform integrations that can be reused across mobile web and native app surfaces.

Important: We are a fully remote team at a global organisation. 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.

Responsibilities

• Delivery and enablement: Leads the team in the delivery of medium complexity initiatives from technical discovery through delivery.
• Frontend Implementation: Improves mobile Wikipedia product experiences for a global audience.
• Backend Implementation: Creates RESTful APIs to serve scalable data pipelines.
• Quality, testing and observability: Builds and improves systems & software that is easy to test, observe, and debug.
• Cross-functional collaboration: Partners with product managers, designers, analysts, and native app engineers.
• Prioritisation: Identifies high-impact technical opportunities and risks across a quarter.
• Mentorship: Supports the growth and success of others through code review and technical design.
• Culture and standards: Raises team standards in code review, technical design, and decision-making.
• Operational Awareness: Plans work with awareness of downstream or upstream effects.

Qualifications

• Bachelor's and 5+ 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 or React, and at least one backend language such as PHP, Python, Java, Go, or similar.
• 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 working in a self-driven, lean environment.
• Commitment to the Foundation's Mission and Values.

Additional Qualifications

• 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.
• Familiarity with Wikipedia / wikitext / markdown editing or content management systems.
• 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.
• Experience working in a fully remote, distributed team.

Benefits

• Competitive and equitable salaries.
• Remote-first organization with staff members in 40+ countries.
• Inclusive and equitable workplace.

Company Description

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.