Bilingual Speech-to-Text & Text-to-Speech App

I'm seeking a skilled developer to create an Android and iOS app that offers both speech-to-text and text-to-speech functionalities. The app should support English and all Indian languages, including Hindi, Tamil, and Bengali.

Key Requirements:
- Accurate speech recognition and synthesis
- Support for English and all Indian languages
- User-friendly interface
- High responsiveness and low latency

Ideal Skills and Experience:
- Proficiency in mobile app development (Android and iOS)
- Experience with speech recognition and synthesis technologies
- Knowledge of Indian languages and linguistic nuances
- Strong UI/UX design skills

Please share your relevant experience and approach to the project.