Hire a PHP Developer for advanced Wordpress work -- 2

This is not for someone who can just “play” with Wordpress. I can do that. I need a real expert in PHP, HTML and very advanced Wordpress. Summary I own a skincare company website that has just one product. It’s done on WordPress with a custom theme and Woocommerce. It also has a customised affiliate program in in (AffiliateWP). The site is one year old and over time it has evolved, with lots of changes along the way. Right now it looks good to users – it all works and is pretty much as I’d like it to be, except the back end is very messy. Essentially I’d like to clean it all up, change the front page, add a child theme, and re-build it to look the same, but configured properly. Problem • The theme is completely incompatible and now redundant. • The ecommerce part was an afterthought and done by someone that didn’t know Woocommerce, so, for example, the product page doesn’t have reviews on it as it’s not really a product page. • A child theme was not used for the AffiliateWP customisation, so every time a plug in update happens, all the customisation is lost. Changes Overall, apart from the front page, everything will remain as it is currently, as it all looks as it’s supposed to, but in the backend its very scrappy with badly coded files and knitted together. I have a new design for a front page that I’d like to implement. It’s a simple one page design which scrolls down through approximately 3 screens of information. Currently the “product page” sits on the home page, but I’d like it moved to its own proper product page, where we can then activate reviews. The current theme will have to go, replaced by something far simpler that does no more than I need – showcasing my front page. I've bought a new theme to use. The back end needs cleaning up – redundant code removed, files consolidated.