Short Native App Development (iOS & Android)

We are looking for experts when it comes to user experience. We are looking for smoothness and an excellent performance when it comes to the development of this app. And we are looking for impressive attention to detail and perfection in terms of the app's design.

We are talking mostly about the frontend development of a fairly small native app (28 views) which is about virtual payments. The design is already developed in Adobe Illustrator to the exact specifications of what we want to see. We want a fast and detail-oriented development for native iOS and Android Apps.

Languages used: JS, Angular.JS, Express.JS, Node.JS, MongoDB and AWS Cloud Computing.

Note 1: The app is for Latin America so it's in Spanish. However, all designs are already made and so knowing Spanish is not necessarily a requirement.