Looking for a developer (firmware (flash file/ROM) customize)

I need to customize mobile(Android) firmware and rewrite the phone. I am looking for a developer that solve this problem. My phone model is Oppo Reno 2 Z CPH1951, Phone name oppo Reno2 z. I want you to download my phone firmware flash file again and rewrite it. But I want to remove the SSL code configuration file in the ROM(that is, the downloaded flashing package) and re-sign and package the modified ROM. Please let me know how to remove the SSL config file, re-sign the flash file and write it on my phone. If you can do this, please bid now. please don't bid if you don't understand. place the word "ROM" at the top of your proposal.