Sr. Native Android (Kotlin) Developer

I am looking for a senior native Android developer with experience in Kotlin to add new functionalities to an existing app. The features have a medium complexity level, such as adding new functionalities. It is important that the developer has experience in integrating with other systems.

Key requirements:
- Senior Android developer with strong experience in Kotlin
- Ability to add new functionalities to an existing app
- Experience in integrating with other systems
- Familiarity with detailed specifications for the features to be added
- Developed medium/large projects with Kotlin
- Expert in using Android SDK
- Experienced with Payment Systems (POS)