Android Kotlin developer

I am seeking an experienced Android developer proficient in Kotlin to work on a new app project. The developer must be able to adhere to strict programming guidelines and work in an agile environment. This is a monthly contract position, with the potential for renewal. The developer should have experience with clean code, unit testing, and design patterns. Please provide your expected monthly rate and note that this position is for an individual freelancer, not a development team. Thank you.