Modify Hirebee Platform - Frontend Forms + Search Functionality

We have the Hirebee platform on Wordpress. We need some changes made to it as it is not user friendly at the moment. Here are the changes: 1. On the post project page the categories dropdown needs to be changed from a dropdown to an autocomplete field that searches all the available categories (pretty much like the skills input field does below). It must be restricted so they can only choose one category. 2. On the freelancer profile page there are so many checkboxes for their skills. This needs to be changed to an autocomplete input field where they can select multiple skills. This basically needs to be copied from the post project page. 3. On the category page there is a long long list of checkboxes. We need to change this to an autocomplete skills where they can select multiple skills and filter out the jobs in the category. They then press update and it filter them. 4. The site currently has no search functionality. It did have originally but its been removed. We need the search functionality to be able to have the option of searching skills, jobs or freelancers. Maybe like the search functionality on Freelancer here. These are pretty straightforward form changes for someone who knows Wordpress and ideally someone who's worked on Hirebee before. Please use HIREBEE in description to show you've read everything.