Social media app

I am looking for a UI/UX developer to create a social media app that will be available across platforms. The key feature of the app will be photo sharing. I do have a specific design in mind, but I am open to suggestions.

Ideal skills:

- Should be good with research
- Must know how human brains work
- Ability to create a user-friendly and visually appealing app design
- Familiarity with user behaviour
- Must know any UI designing tool.