Hello My name is Kalpesh, I have pretty good experience in WHMCS since 2012. I used to work with one of the Hosting company where my job was to maintain and setup and integrate servers as well as products to increase the sell and maintain the support line.
I know how to integrate required modules to run WHMCS smoothly, I have not just work with one of the site, I have implemented more than 10+ WHMCS setups, I am aware of the customizing as well. I am sure and very confident then, I will not only integrate but I will make your WHMCS work as you expected.
I also do have server knowledge with I used to serve clients all over the world. I am good with Tickets and bakcing up them for the future reference.
Though if you have any question, I will very happy to answer them all before you take any decision.