This blog post outlines Tinder's experience in decomposing their monolithic codebase for the iOS application. The authors explain the challenges of monoliths in software development, introduce modularization as a strategy to flatten the build graph for improved concurrency, and discuss techniques used to identify and extract files systematically. They emphasize the significance of automation in expediting the process, achieving a 78% reduction in build time, while reflecting on how the project transformed their understanding of codebase productivity and ownership.