Engineered Prospareto (finance management) and Patercent (finance news) apps, available on the Play Store. Enhanced fintech mobile apps using Flutter, which resulted in a 20% increase in downloads and 60% fewer crashes. Designed and implemented responsive Flutter UI/UX based on Figma designs, boosting user retention by 25%. Adopted the MVVM architecture, reducing code complexity by 40% and improving maintainability. Streamlined data retrieval processes, leading to a 25% reduction in API call failures.