Make App and Phone cloud server system like Twilio to call and play custom messages then listen for response.

Hello, I am looking to make an App and also looking for someone with cloud server phone experience like Twilio programming . If you only have experience in 1 field, it is possible to build a team. I provided some basic capabilities of what I need the App and Server to do. However, this is just some basic example but I will make this more extensive. I prefer Twilio for the cloud server but I am open to any suggestions. I will need the code or access to whatever work from this project so I can customize myself. Feel free to give me your input 1) app function for android and iphone 2) user can record a message and provide a phone number to the App's cloud server. 3) Cloud server will call the number, play a intro message, then play the App User's custom message. Call receiver must press 1 or else the script will call again in 2 minutes and repeat infinite times until the receiver press 1. 3) Another function: User can record a question, Cloud server will call and play the question, and receiver can press 2, answer question with recording, and hang up. 4) the recorded answer or any input from Call receiver will be played back to the App User in the message inbox. Example: Steve is staying at a hotel with a valet service for his car. Steve puts the valet phone number in the app. When it is time for Steve to notify valet to retrieve his car, he records a message: "Please get the Red Toyota ticket number 4-3-8-1." The Cloud Server calls the Valet number, and plays "Hello, please confirm the following recorded message 'Please get the Red Toyota ticket number 4-3-8-1,' Press 1 to Confirm or 2 to Play a recorded response." Example 2: Steve wants to call a restaurant to ask if they are serving his favorite lobster dish. Steve puts the restaurant's phone number in the App and records the following message: "Hello, I want to know if you are serving Lobster with red sauce tonight or if you are out of stock." The cloud server calls the restaurant and plays the following message "Hello, please answer the following question 'Hello, I want to know if you are serving Lobster with red sauce tonight or if you are out of stock.' Press 2 to record your response." The restaurant receptionist says "Hello, Yes, we have lobster in stock, you are welcome to come" Then receptionist Press 2. Steve gets notification in his App inbox with the recorded response from the restaurant. **The app should be able to Record/Play custom messages, Record/Play custom introductory message, and have many similar functions to make this a tool for myself. Feel free to give me your input. The actual App function could be as simple as sending an email with attached files from recorded User input. The real functions are the phone cloud server