Cross-platform mobile app (iOS & Android) for fasting, nutrition and workout tracking, built with React Native.
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FitFast is a comprehensive intermittent-fasting and nutrition app for iOS and Android, live on Google Play. I joined the existing team and worked within a large React Native codebase — adding new features, refactoring screens and shared logic, and helping evolve the app across fasting, meal tracking, food scanning, workouts and subscriptions.
Contributing to a feature-dense production app means changes have to fit existing patterns, stay smooth on real devices and not regress fasting, nutrition, realtime or payment flows. Much of the work was careful refactoring alongside shipping new functionality.
New features delivered and parts of the app refactored to be cleaner and easier to maintain, while keeping the live app stable for users on both platforms.
Built and shipped new screens and flows across fasting, nutrition and tracking as part of the team.
Refactored existing screens and shared logic to reduce complexity and improve maintainability of the codebase.
Worked on performance, UI consistency and fixes across the React Native app, using Reanimated and Skia to keep interactions smooth.