During July 2025, Hieu Nguyen focused on frontend improvements for the nccasia/mezon-fe repository, addressing both reliability and design consistency in a mobile context. He resolved a cross-platform issue with the Voice Channel Bottom Sheet by correcting a misnamed variable and refining iOS timing, ensuring reliable notification settings for users. Additionally, he enhanced the SendToken screen by updating icon colors to match the theme’s strong text color, improving UI coherence across the profile section. Hieu applied his expertise in React Native, JavaScript, and UI/UX to deliver maintainable code changes, demonstrating thoughtful attention to both user experience and technical detail.