Mobile application developers

I am looking for experienced mobile application developers to build an app that works on both iOS and Android platforms. The purpose of the app is for business use, and I have a specific design in mind to ensure that the app meets my specific requirements. I am looking for experienced developers to create a high-quality mobile application with a modern look and feel. I would like to review proposals from professionals who have a track record of success in creating superior mobile applications. Please include your portfolio and any other relevant information when submitting your proposal. Thank you.