Multi-Tenant VoIP Platform Development

I already lease DID numbers from Telnyx and have full access to their SIP, voice, SMS and WhatsApp APIs. Now I need you to turn those raw services into a polished, customer-ready solution that works everywhere—on... (Budget: ₹37500 - ₹75000 INR, Jobs: Android, API Development, Billing, iOS Development, iPhone, Mobile App Development, PHP, SIP, VoIP, Web Development)