Software Engineer III, Core Experiences

The Wikimedia Foundation is a nonprofit organization that operates Wikipedia and other Wikimedia projects. They are seeking two Software Engineer III’s to join their App Growth and Moderator Tools Engineering teams, focusing on building web-first product experiences and improving tools for volunteer patrollers and administrators.

Responsibilities:

• Supports delivery of initiatives. Breaks down complex features into tasks, anticipates risks and collaborates to resolve blockers
• Can successfully build moderately complex features and components with minimal support and suggests areas for architectural improvements
• Takes ownership of bug fixes and production problems and communicates in a clear and timely way about impact and resolution
• Designs and improves features with observability and testing as a core consideration. Instruments features that enable deeper analysis by Product Analysts. Contributes to healthier testing and software quality practices
• Supports team alignment by asking clarifying questions, reinforcing agreements, and coordinating their work with cross-functional partners. Facilitates team ceremonies
• Contributes meaningfully to planning. Helps scope work. Identifies risks across multiple sprints. Adapts as priorities shift
• Participates in code reviews, design discussions, and technical planning; shares knowledge proactively; and helps improve team development workflows
• Thinks through how code affects usage and trust. Contributes to onboarding, documentation, and hiring efforts at the team level

Requirements:

• Bachelor's + at least 2 years or equivalent professional web application experience
• Experience working with backend languages like PHP or Python and/or experience with front end languages particularly with Javascript frameworks
• A demonstrated ability to deliver testable, user-friendly features in a collaborative team environment
• Experience building responsive or mobile-first web experiences
• Experience converting design mockups into functional components
• Experience building features with observability and testing in mind
• Experience with incorporating performance and accessibility into features
• Experience in writing well-documented and readable code
• Experience working in a fully remote, internationally distributed teams or organizations team
• Experience working with large, legacy codebases
• A history of open source contributions
• Prior experience with MediaWiki or Wikimedia projects
• Familiarity with Wikipedia / wikitext / markdown editing or content management systems (e.g., MediaWiki, Drupal, WordPress)
• Some experience with data science, machine learning, and/or AI (e.g., familiarity with prompt engineering, Jupyter notebooks experience, etc.)
• Experience in launching and maintaining mobile applications, cross platform app frameworks, or building webview-wrapped experiences in native mobile apps
• Experience building mobile games or other interactive experiences
• Experience with at least one Python framework, such as Django or Tornado