OTA Update Script for our Android APP

Needed Android APP O-T-A Updater Developer We have developed an Android APP, which we want to update every .... to add more features once a while. As the application isn't available in the APP-Store and is available in China - we need the OTA Update script to work without Play-Store or Google Services. We need the OTA Update script for the Android APP as following; - No connection with Google Play (as APP isn't connected to the Play-Store) - No connection with Google Services (as we do not use Google Services, and in China Google services are blocked) - OTA Update Script connected with our servers (using multiple URL's to connect to multiple dedicated servers) - OTA Update Script should be connected with several URL's (in case one URL is down, blocked or ain't working anymore) - OTA Update Script should contain an option to set wireless connections (update on any connection, update on WiFi or update on cellular) - OTA Update Script should check every "once" per 120 hours if a new update is available on the servers / URL's (when APP isn't connected for 120 hours, than check instantly when APP is connected if there is an update available) - OTA Update Script should check if a file is available in set URL (if there is a new file + new name + new date then install - if data is similar to latest update, than do not install) - OTA Update Script should update APP by replacing the complete APP (i.e.: it should create a temporarily file, and replace existing APP by updated APP file in APP folder on device) - OTA Update Script will to be connected to HTTPS URL's / Servers (using a secure SSL/TLS connection) - OTA Update Script needs to connect to URL / Servers secured (using Username + Password to connect to file on URL's / Servers) (all dedicated URL's / Servers use same credentials) - OTA Update Script should be developed in C# and Java (we need implementation script + source code who creates script) - OTA Update Script should not conflict with Android settings / rules (the script should work on any Android 4.*+ and CyanogenMod 12*+ or higher device) We need the OTA Update Script to be ready within two weeks. Budget is $500 - $750 If you have many experience in OTA Update Scripts + Android Update Scripts contact us!