Custom Android IME Keyboard App Similar to GO Keyboard Style

I am looking for an experienced Android developer or development agency to build a custom Android keyboard / IME app. The app should provide a modern keyboard experience inspired by popular Android keyboard apps such as GO Keyboard, but it must be developed from scratch... (Budget: $400 - $1000 USD, Jobs: Android, Android App Development, Java, Kotlin, Mobile App Development, Mobile Development, Software Architecture, User Interface / IA)