Hello Sir/ Ma'am,
I have developed several modules of WHMCS.
I have 7+ years experience on web development and developed lots of Portals, ERP and CRM. I have 3+ years experience in team leading and leaded many government projects as well. I have good experience on Yii2, PHP, jQuery, CSS, Ajax ,MySQL and PostgressSQL.
As per my experience of past works, I am sure I can contribute my experience to this project to make it a successful product.
Thanks