Evolution of the Medium iOS app architecture
Article Summary
Medium's iOS team ditched their monolith for Swift packages and SwiftUI. A year later, they're shipping features faster than ever.
Thomas Ricouard from Medium Engineering shares how they transitioned from a monolithic iOS architecture to a package-based system. This follow-up details what worked, what didn't, and how the team structures features today.
Key Takeaways
- Split codebase into Model and Features packages with independent library products
- Created Env for dependency injection and Navigator for cross-package navigation
- GraphQL queries live with features, not in shared code layer
- SwiftUI previews plus packages enable rapid iteration with design feedback
- iOS 14/15 SwiftUI differences require heavy testing and occasional tradeoffs
Critical Insight
Medium's modular architecture with Swift packages and SwiftUI dramatically improved iteration speed, though the transition took over a year of incremental work.
