The Hidden Cost of Wrong Abstractions: When Clean Architecture Hurts Your Startup

--- title : " The Hidden Cost of Wrong Abstractions: When Clean Architecture Hurts Your Startup" published : true description : " A hands-on walkthrough of collapsing premature Clean Architecture layers in Kotlin — with real before/after code that cut files-per-feature by 60%." tags : kotlin, android, architecture, performance canonical_url : https://blog.mvp-factory.com/the-hidden-cost-of-wrong-abstractions --- ## What We Will Build (or Rather, Unbuild) Let me show you a pattern I use in every early-stage project audit: identifying abstraction layers that cost you velocity and collapsing them — without losing testability. By the end of this walkthrough, you will know how to spot single-line use cases, unnecessary repository interfaces, and redundant mapper classes in your Kotlin Android codebase, and you will have working code showing the refactored result. ## Prerequisites - Familiarity with Kotlin and Android ViewModel basics - A project using Hilt for dependency injection - Retrofi