Architecture

How We Scaled a React Native Codebase to 200,000 Lines Without Losing Developer Velocity

• Larry Brooks
• Software, Strategy
• 21 May, 2026

At 20,000 lines, our React Native app was a joy to work on. At 80,000 lines, builds took 4 minutes and developers stepped on each other's changes daily. At 120,000 lines, we stopped and restructured.