Senior Software Engineer, iOS

May 23, 2026
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Team

Join the Wikimedia Foundation (nonprofit organization behind Wikipedia and other free knowledge projects) on the App Growth team within Core Experiences engineering group. The team has a clear goal: make the apps the destination for knowledge lovers and grow active readership. Fully remote, global organization.

Responsibilities

• Consistently lead team delivery of medium complexity initiatives from technical discovery through delivery; break down initiatives into features, drive estimation, manage scope, identify risks, and make pragmatic tradeoffs
• Improve mobile Wikipedia product experiences serving a global, multilingual audience on iOS; lead system design for medium-sized projects; design and build accessible, adaptable, scalable components
• Build and improve systems that are easy to test, observe, and debug; instrument features enabling deeper analysis by Product Analysts
• Partner with product managers, designers, analysts, and native app engineers to shape pragmatic solutions balancing user needs, technical constraints, platform expectations, and delivery timelines
• Proactively identify high-impact technical opportunities and risks across a quarter; partner with team to shape priorities and sequencing
• Actively support growth and success of others; mentor engineers through code review, technical design, pairing, delegation, and modeling strong engineering judgment
• Raise team standards in code review, technical design, testing, documentation, accessibility, observability, and decision-making
• Plan work with awareness of downstream/upstream effects; actively support hiring and onboarding

Requirements

• Bachelor's degree and 5+ years related professional experience with significant experience building iOS applications
• Strong professional experience and proficiency with Swift, SwiftUI, UIKit, and familiarity with iOS architectural patterns
• Experience with iOS performance optimization techniques for smooth, responsive, high-performing applications
• Experience working in a self-driven, lean environment
• Commitment to the Foundation's mission and values
• Remote role requiring at least 4 hours of workday between 14:00 UTC and 21:00 UTC

Preferred Qualifications

• Experience adding webview-wrapped experiences to existing native mobile apps
• Experience maintaining cross-platform mobile applications
• Experience building mobile games or other interactive mobile experiences
• Experience with data science, machine learning, and/or AI (prompt engineering, Jupyter notebooks)
• Familiarity with Wikipedia/wikitext/markdown editing or content management systems (MediaWiki, Drupal, WordPress)
• Experience leveraging agentic coding to scale work of small engineering teams
• Prior experience with MediaWiki or Wikimedia projects
• History of open source contributions

Benefits

• Fully remote, global organization
• Competitive, equitable pay based on skills, experience, and location (no salary history considered)
• Work on Wikipedia and free knowledge projects used by millions globally
• Not-for-profit, charitable organization mission
• Values diversity, inclusion, and equitable workplace
• Equal opportunity employer
• Reasonable accommodations available for applicants with disabilities
• Hiring in multiple US states and countries (Brazil, Canada, Colombia, Germany, Ghana, India, Indonesia, Italy, Kenya, Mexico, Morocco, Netherlands, Poland, Singapore, South Africa, Spain, Switzerland, UK) through local EOR

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