[Summary] We are looking for someone to help us improve the step tracking feature implemented in an existing React Native app. Currently, there are some bugs and limitations, so we would like you to make improvements to ensure proper use. [Request Details] Improvement of the existing pedometer function Current Specifications: - Press "START" to start measurement, press "FINISH" to end measurement - Press "START" again to restart measurement, press "FINISH" to end it, and if the date is the same, the step count will be added to the previous step count. Current Issues: - Measurement only possible in background mode → Improved to allow measurement both when the screen is open and in background mode - User reports of "step counts sometimes not being counted correctly" → Improved to ensure stable measurement Supported Environments: Both iOS and Android [Technical Environment] - Language: React Native (Expo environment) - Device Build Test: npx expo run:ios --device, npx expo run:android --device - Production Build: EAS Build [Notes] - Do not publish code in public locations - Do not modify existing code unnecessarily - Document changes and their intent clearly [Required Skills] - Experience developing apps with React Native - Pedometer/health tracking for both iOS and Android Experience implementing features (e.g., APIs) ・Experience developing in the Expo environment [Deadline/Reward] ・Deadline: September 19th ・Reward: $20 [What to tell us when applying] ・Previous experience implementing step counting or sensor-based features ・Available schedule