Cloud Telephony Developer Needed

Cloud Telephony Developer – Number Masking & Call Recording We are looking for an experienced developer to integrate a cloud-based calling solution into our existing matrimonial mobile application. Required Features Number masking User-to-user calling Call recording Call status tracking Call duration Call history Secure recording access Backend API integration Webhooks Admin call logs Android/iOS integration Basic security and authorization Preferred Providers We are considering: Exotel Twilio Or another reliable India-compatible cloud telephony provider We prefer using an existing cloud telephony provider rather than building telecom infrastructure from scratch. Existing System We already have: Mobile application Backend/API User authentication User profiles Admin panel Database The developer will integrate the calling system into our existing infrastructure. Important Requirement The caller and receiver must NOT see each other's actual mobile numbers. Call recordings must be securely stored/accessed and must not be exposed through public URLs. Expected Deliverables Backend integration Mobile app integration Number masking Call recording Call status webhooks Call history Admin call logs Secure recording access Testing Production deployment Complete source code API/documentation Budget Our target development budget is: ₹10,000 – ₹12,000 Please provide a fixed-price quotation. Third-party telephony usage charges should be quoted separately. Timeline Expected: 2–4 weeks. Please answer these questions Have you implemented Exotel/Twilio number masking before? Have you implemented call recording? Which provider would you recommend for India and why? Please share a relevant previous project/demo. What backend technology would you use? How will you secure API credentials? How will you secure call recordings? What is your fixed development price? What is your delivery timeline? How many days of post-deployment bug support will you provide? Please do not send a generic proposal. We are specifically looking for experience with cloud telephony, number masking, call recording and API/webhook integration.