Mobile App to let us know phone call status. Also need developers for ongoing projects of similar nature.

The purpose of the app is to log call details of our salesforce in realtime - onto our server in the cloud. This is done so that our other software can easily know which sales rep is on a call and which one is available for consultation. Also we will write other software that will generate performance report of sales persons based on the number of calls made and received and their duration - but you do not have to write software for that. You have to write an app that will sit on the sales person’s phone and generate a log of call details on our server in the cloud in real time as the sales person makes calls and receives calls and as these calls end. So there will be server side code too that will take the data from the app and create the log files. The server side code can be in node.js or python or some other way to generate log files easily. The structure of the log files can be discussed and finalized so that it is easy for us to carry out operations on it later. Also it should be easy for us to know the current status of any phone number without searching and processing the entire log file - so there will be a separate log file with one record per phone number. In addition there will be some server side code/api that we can call to find out which devices are currently available from a given list of phone numbers passed to that api. The server side api will contact the app in realtime for each of those phone numbers and verify its status of busy OR available and return this status at that given moment. A flag can be passed to the api to tell it to contact the connected apps in realtime for those numbers OR whether to use the log file to report its status. All apis that you will write will be in rest format and will use json for data. Identifying the device: Every app needs to be registered first with the phone number also making sure that 2 devices cannot be registered with the same phone number since the phone number is tied to the device. If the same phone number is used to register from another device then we will disassociate the phone number with the earlier device and the app on the earlier device will be logged out and will need to register or login once again with some other phone number. There is no password needed for Registration/login and phone number is verified using a code sent via sms - similar to the sms verification system used by whatsapp. You will use twilio or other api to send the verification sms.