For our data center we need to buy a proxy server that will work smoothly. This is very important for our work. What do you recommend?

With such a question it is best to contact programmers. But if for some reason you can not consult with such specialists, then try to simply study the information that is presented at the link https://floppydata.com/ And there you can buy datacenter proxies.  I think with the help of this site your question should be solved quickly.