Design and Develop a Discounted Market App for Real Price Outlets

I want to build an online app that advertises products from real price outlets at discounted rates. My goal is to help users easily find and share the best deals available. I need a freelancer who can guide me through planning, designing, and developing the app from scratch. Ideal skills include UI/UX design, mobile app development, and experience building platforms for online shopping or deal aggregation. I would also appreciate advice on user experience features and ongoing support as the app launches and scales.