Hey!! I can surely do it. I am WHMCS expert having 5+ years with custom invoice design, custom template, Addons, Registrar module, Provisioning module, whmcs server modules development, WHMCS and WHMCS addons-modules development,whmcs theme customization, whmcs payment gateway modules and whmcs domain registrar in my past years experience
** Your Invitation over a private chat would be highly appreciated**
Thanks!!