I'm seeking a developer to create an on-demand calling app for emotional support, with the following features: Core Features: - On-demand calls: Users can initiate calls anytime. - User authentication via phone number verification. - In-app messaging for users to communicate. Ideal Skills & Experience: - Experience in developing calling applications. - Strong background in user authentication systems. - Proficient in implementing in-app messaging features. - Knowledge of UI/UX for user-friendly design. And I have already purchased a full functional app script for the same, here is the reference url https://codecanyon.net/item/talkin-expert-audio-video-calling-app-consultation-astrology-dating-doctor-lawyer-advisor/58738636 I need few minor Customisation in front end and backend. Please provide relevant work samples.