Need a marketing expert to promote app

We have a new food and event ordering app. The app provides a platform that allows businesses to sell their products so the project would be to get the platform known to customers and get businesses such as restaurants, grocery shops to sign up.

It will be good to have someone or a team that can do social media, ads, for the app, direct marketing, fliers posters and all. to basically come up with strategy to create awareness for the app.