Website Category Photos Overhaul

I'm in need of professionals talented in manipulation of photos in PNG format, for my website's categories. The project involves design and dark background to to be Unified, it’s prapproximately 38 photos. While specific modifications for each photo were not defined,. A knack for creativity and attention to detail would be greatly beneficial. it's advisable for freelancers to include samples of past work, experience and a detailed proposal about their approach to this project.