I would like to hire an Android Developer

We need a custom app for android tablets. We will have 120 different android tablets that we will use as 120 different, interactive, bi-lingual, descriptive text labels in a museum. Each tablet will have the same starting screen, with two interactive buttons from which to choose (English or Spanish). In the future, we would like the ability to add two more language choices. After you select your preferred language the screen changes to a screen of descriptive text about the exhibit. At the bottom of this first “text screen” is a button for “next page.” If you don’t press this “next page” button within 45 seconds, the screen reverts to the original “choice of language” screen. If you do press this “next page” button, the screen changes to a second screen of descriptive text. This second screen of descriptive text also has a “next page” button at the bottom of the screen. If you don’t press this “next page” button within 45 seconds, the screen reverts to the original “choice of language” screen. If you do press this “next page” button, the screen changes to a third screen of descriptive text. After 45 seconds, the screen reverts to the original “choice of language” screen. • We want the ability to add, delete, or edit words in the text ourselves. • We want the ability to add a fourth or fifth screen of text to the tablets if we need more text. • We want the ability to have all the tablets turn off at a programmable time of day. They can be turned on manually each morning. • We do not want metrics, or any other bells and whistles. • We want the tablets locked down into a kiosk mode so the public cannot fiddle with the programming or turn them on and off. • We want the ability to resize text and choose fonts. • We want the ability to insert a JPG image into the text screen, in line with the text.