Hello hope that you're fine.
To do this job I will need more informations about it. I'm the owner of one Host and I work with PHP and Node.JS every day, as well I do Security Researches in companys.
Let me know if yoFlere
Hello Are you okay?
I can help you perfectly with WHMCS customization.
I am our expert. I've done several jobs with WHMCS including ADDONS to add additional features.
If you still need me, contact me via chat to discusFlere