i need mobile designer for my app

I am in need of a mobile designer to create the design for my app. The main function of the app is not specified, but I am looking for a designer who has experience in designing for Social Networking, E-commerce, and Utility apps. The target audience for the app is also not specified, but I am looking for a designer who is able to design for Children/Teenagers, Young Adults, and Middle-aged Adults. As for the preferred design style, I am open to any of the choices provided: Minimalistic, Colorful and Bold, or Sleek and Modern. The ideal candidate should have experience in designing for mobile apps and be able to create a visually appealing and user-friendly design.