I need some changes to an existing website. I already have a design, I just need you to build my online store.
1. Fix some bugs on search results
2. fix our split payment module (payments per type of user)
3. Site speed optimized
4. Caching system optimized
the site is live, it's private - does not need SEO - only improvements to UI/UX and module functionality, as well as improvements on server side load.