Sms provider API integration

I am looking for a freelancer who can integrate an SMS gateway into my custom-built PHP system. My main objective is to use the gateway for notifications and alerts. I already have a preferred SMS gateway provider, and I need someone who has experience in integrating SMS gateways to custom-built PHP systems. The ideal candidate should have the following skills and experience:

- Proficient in PHP programming language
- Familiar with SMS gateway providers and their APIs
- Experience in integrating SMS gateways to custom-built PHP systems
- Ability to work independently and deliver within the specified time frame
- I changed SMS Gate provider.
- I need to Integrate the new SMSGate
-Button to send SMS to clients
- Testing new updates will be in demo website
- Remove all related files and codes of current SMSGate provider "Clean"
- Integrate the new SMS gate provider
-Text File explaining in details how to install the new files and updates to the server and help until everything installing and working well "Install instruction"
- Fixing Page issue of changing username,password,sender name.
-SMS History/page
-A page to send promotion sms with promotion usersender to all Clients exclude duplicated numbers.
- SMS Settings page so I can change SMS gate
provider in futures with all types of SMS gates
-SMS Daily/Monthly Sales Report. Report contains (Total sales,Total Amount,Total Unpaid) Date picker of report day and time system will automatically send report to Employee Mobile number at specific time everyday/month
-Integrate all API Features,Error Messages,Balance,Points...etc
-Send source code to me.