Wikimedia Foundation iOS Jobs in the USA

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Wikimedia Foundation
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About the Company

Wikimedia Foundation is the nonprofit organization that hosts Wikipedia and supports the people, technology, and policies that enable reliable information to be shared with the world. Wikipedia receives nearly 15 billion views each month and is the only website among the top 10 most visited that is hosted by a nonprofit organization. The Foundation supports nearly 265,000 volunteers every month, with 324 new edits made to Wikipedia every minute. Wikipedia has over 65 million articles in 300+ languages and is built by nearly 250,000 volunteers from all kinds of backgrounds who edit articles, check facts, fix code, and help make the internet's knowledge better. The Foundation's mission is to fund, open, support, protect, and advance human knowledge. Ways to support include donating, editing, participating (coding, photography, organizing events), and advocating for free knowledge.

Industry

  • Nonprofit
  • Digital Knowledge
  • Open Source Software
  • Online Encyclopedia
  • Educational Technology
  • Information Access

iOS Engineering at Wikimedia Foundation

Wikimedia Foundation develops the official Wikipedia iOS app, enabling users to learn something new every day with reading challenges, explore new topics on the go, and access over 65 million articles in 300+ languages. The iOS engineering team builds and maintains features for article reading (rich text, images, citations, infoboxes, tables, math formulas), search and discovery (full-text search across millions of articles, categories, nearby articles), reading challenge (daily reading prompts to expand knowledge), offline reading (save articles for later without internet), language selection (switch between 300+ languages on the fly), dark mode and customizable text sizes (accessibility for comfortable reading), share and citation tools (generate citations in multiple formats), nearby articles (location-based discovery of articles about nearby places), watchlist (track changes to favorite articles), editing interface (contribute to Wikipedia by fixing typos, adding references, updating content, uploading images), talk pages (discuss article improvements with volunteers), push notifications for watchlist changes and mentions, voice search (speech-to-text for article search), Wikipedia Zero (data-free access in partnership with mobile carriers in some regions), and accessibility features (VoiceOver, dynamic type, high contrast, large text).

Mobile development in this context focuses on rich text rendering (custom WebView or native rendering for Wikipedia's markup language — wikitext, HTML, with math formulas via MathML, image galleries, infoboxes, tables, citations), offline storage (Core Data or similar for saving articles with images and formatting), full-text search (local search index on device), location services for nearby articles (MapKit integration), reading challenge gamification (streaks, badges, daily goals), editing interface (wikitext editor with syntax highlighting, preview, citations, image upload with camera integration), push notifications for watchlist changes, talk page replies, and mentions, voice search (Speech framework), accessibility features (VoiceOver for blind readers, dynamic type for visual impairments, large text, high contrast, reduced motion), image caching and optimization for millions of images across 65 million articles, synchronization of reading lists and watchlists across devices via user accounts (login to Wikipedia), and offline-first architecture for reading without internet.

Products and Platforms

  • Wikipedia iOS App – Mobile access to over 65 million articles in 300+ languages
  • Reading Challenge – Daily prompts to learn something new and expand knowledge
  • Offline Reading – Save articles for later without internet
  • Nearby Articles – Location-based discovery of articles about nearby places
  • Editing Interface – Contribute to Wikipedia (fix typos, add references, upload images)
  • Watchlist – Track changes to favorite articles with push notifications
  • Talk Pages – Discuss article improvements with volunteer community
  • Dark Mode & Custom Text Sizes – Comfortable reading
  • Citation Tools – Generate citations in multiple formats
  • Voice Search – Speech-to-text for article search
  • Reading Lists – Organize articles into collections, sync across devices
  • Wikipedia Zero – Data-free access in select regions

Work Opportunities for iOS Developers

A global nonprofit and open knowledge leader like Wikimedia Foundation hires:

  • iOS Developers – for Wikipedia mobile applications
  • Mobile Engineers (iOS) – focusing on rich text rendering, offline storage, search, location-based discovery, and accessibility
  • Software Engineers – for backend services supporting article content, search indexing, user accounts, and push notifications
  • Open Source iOS Engineers – with experience contributing to open source projects (Wikimedia code is open source)
  • Accessibility Engineers – for inclusive knowledge access for all users (VoiceOver, dynamic type, large text, high contrast)
  • Offline-First iOS Engineers – for saving articles without internet
  • Gamification Engineers – for reading challenge streaks and badges
  • Editing Interface Engineers – for wikitext editing and preview
  • Search Engineers – for full-text search across millions of articles on device
  • API Integration Engineers – for Wikimedia REST API and Action API

These roles focus on building and maintaining the official Wikipedia iOS app used by hundreds of millions of readers and volunteers worldwide to access, share, and contribute to the sum of all human knowledge. Engineers work on rich text rendering of Wikipedia articles with complex formatting (infoboxes, citations, tables, images, math formulas, languages), offline article saving for reading without internet, full-text search across 65+ million articles in 300+ languages, reading challenge gamification (daily prompts, streaks, badges) to encourage learning, location-based nearby articles using MapKit, editing interface for fixing typos, adding references, and uploading images, watchlist and push notifications for tracking changes to favorite articles, talk pages for volunteer collaboration, voice search for hands-free discovery, accessibility features ensuring knowledge is available to all (VoiceOver, dynamic type, large text, high contrast), and cross-device synchronization of reading lists and watchlists via user accounts — all while supporting the nonprofit mission of funding, opening, supporting, and protecting reliable information for everyone, everywhere. The Wikimedia Foundation supports nearly 265,000 volunteers making 324 new edits every minute to 65 million articles, and Wikipedia is the only top-10 website hosted by a nonprofit.

Website

Senior Software Engineer, iOS

May 23, 2026
Wikimedia Foundation
Wikimedia Foundation
Software Development
501-1000 employees

Job Details

View Job
May 23, 2026
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