Hi,
I saw that you need a new website and you need to design a landing page.
Anyway, I have a suggestion, if you want to build a new website, do not use WordPress, Why? Because WordPress is always vulnerable to malware and script hacking. This will not help your business, rather it cause a lot of trouble.
You can use Laravel Framework with AngularJS to build your secured application or website. That is very good and easy to maintain and if your developer wants to leave your team, it's easy to hire a new developer. Because Laravel Framework and AngularJS is a modular.
Anyway, if you want to know more, let's talk.
Best Regards,
PhD Erica