With over 7 years of experience in mobile app development, including native applications for Android, iPhone, and cross-platform technologies such as Flutter and React Native, I believe I have the skills you're looking for in an e-book app developer. My portfolio demonstrates my adeptness in implementing advanced features to enhance user experiences, such as bookmarking and night mode, which will be key to differentiating your app from the competition.
Additionally, with your requirement for integrating a text-to-speech feature, my knowledge and experience in using third-party APIs and Rest APIs will prove invaluable. As a developer who always stays up-to-date with industry trends and best practices, I can promise you a smooth and efficient implementation of this key feature.
To make things better, my full-stack development expertise extends to back-end languages like PHP and databases like MySQL, giving me a well-rounded understanding of the ecosystem necessary to build high-performance apps. Hiring me would not only guarantee a solidly built, feature-rich application but also continued support and regular updates should any bug arise post-delivery. Don't wait any longer – let's traverse this digital journey together!