Thumbnail Degin

I'm looking for a post thumbnail for my project. I have a specific design and color scheme in mind, and it needs to be in 16:9 ratio. I would like an experienced graphic designer to create a stunning post thumbnail that works with my already established brand identity. The image should be in a high enough resolution to look sharp across all platforms (512x512 minimum). The ideal designer should have experience working with this type of graphic design, understand my needs, and make sure I am satisfied with the final product. I am excited to see your proposals!