Hi, there!
We have 7+ years of experience with CMS Wordpress and we can develop a one page website with checkout process.
We work with HTML, CSS, Bootstrap, Php, Javascript, Jquery, CMS Wordpress, Joomla, Opencart, Prestashop, etc. Have a look at our works - https://www.freelancer.com/u/Webln .
Could you provide more details, please?
With regards,
WebIn team!