Android Employees Attendance App

I'm looking for a developer to create an Android-based employees attendance app.

Core Features:
- Clock-in/out: The app should allow employees to clock in and out.
- GPS Tracking: The app needs to have GPS tracking capabilities to monitor the location of employees during clock-in/out.
- Leave Requests: Employees should be able to submit leave requests through the app.

Authentication: The app should use a simple username and password authentication system.

Ideal Skills and Experience:
- Proven experience in Android app development
- Familiarity with implementing GPS tracking in apps
- Experience with creating apps with clock-in/out features
- Understanding of leave request systems in apps
- Knowledge of implementing username and password authentication
Please provide examples of similar apps you've developed in your proposal.