App using TTS API, key/touch inputs, programmable logic

We have previous experience developing similar apps (20+ years ago) that worked on both mobile devices and PCs, utilizing cloud-based algorithms and databases.
This new project is relatively straightforward for a competent developer. It requires several rather basic modules:
1. Input detection module for keypresses and swipe gestures
2. Cloud-based algorithm and database integration
3. Text-to-speech control module (potentially utilising existing software)
Further development will include fine-tuning, subprogram development, and database management systems.

Initial phase: Discussion of features (over Skype or similar), general planning and alternatives, and perhaps development of demonstration modules.

Python is a potential development language (although obviously not mandatory).
Please indicate relevant experience.