Wordpress gallery features customization

I need someone reliable, fast and proficient in WordPress to fix a implemented customize a filterable portfolio with some dynamic content (already implemented with Types) and enable custom filtering and some advanced categorization. The site is ready, but there's some advanced features needed. Basically we have a filterable gallery for Artists paintings. Each artist is a different "kind" in the portfolio. Each "kind" can have one or several works displayed. Each created work has several custom fields (already implemented). What we need: The default gallery presentation should feature ONLY one thumbnail from each artist. We need a menu with every artist (already implemented in a filterable portfolio) and when we filter and click on the thumbnail from the artist we go to a page with a listing of all the works from that given Artist with the custom fields implemented. A second separate gallery identical to the one above, for Books needs to be implemented too. There's some flexibility in the gallery. Most of the work is done, so it's only a code customization work. Prttty much around 6 to 8h of work should be more than enough. I am looking for a fast and reliable person for a ongoing partnership on WordPress projects.