Looking for an API developer ( engineer ) for my Multi Wan Proxy Modem Gateway

I'm looking for an API developer to get my ''4G 16 Ports Multi Wan IP Port 16 IP Proxy Modem Proxy Gateway MTR716'' to rotate the IPs of each of the 16 SIM cards individually.



The seller has confirmed that this device supports API and that they will provide the API document.

https://www.alibaba.com/product-detail/LTE-4G-16-port-sms-sender_1600437162490.html

Sent you a PM buddy

Send me the API documentation so I can get an idea of the difficulty.
I'll draft a proposal after checking it.