Kotlin Multiplatform at Scale: Stone's Journey to 61% Code Sharing
Article Summary
Stone, a Latin American fintech serving 4M+ users, went all-in on Kotlin Multiplatform two years ago. The results? 55% code sharing across their mobile apps.
Staff Engineer Rodrigo Sicarelli shares Stone's two-year journey adopting KMP at scale. This KotlinConf 2025 talk covers their framework evaluation, organizational transformation, and real-world impact on productivity and performance.
Key Takeaways
- Trained 130 mobile engineers to shift from native to multiplatform development
- Achieved 55% code sharing between iOS and Android applications
- Balanced code reuse efficiency with fintech-grade user experience requirements
- Measured tangible improvements in team productivity and developer satisfaction
Critical Insight
Stone successfully scaled KMP across a large fintech organization, reaching 55% code sharing while maintaining the seamless UX critical for financial apps.
