Arduino Navigation Device Firmware & Hardware

I'm looking for a skilled freelancer who can create both the firmware and hardware for a project involving Arduino/Adafruit. The product should function as a navigation device.

Key Features:
- User presses a button to lock the start location
- Re-pressing the button guides the user back home using simple arrows on an LCD screen
- The device also displays the expected walking time to return

Specifications:
- Screen: LCD screen for displaying navigation information
- Power Source: A rechargeable battery
- Control: A capacitive button for setting start and end points

Ideal Skills & Experience:
- Firmware development for Arduino/Adafruit
- Hardware design and implementation
- Experience with LCD screens and rechargeable power systems
- Knowledge in using and integrating capacitive buttons
- Prior work on navigation or tracking devices would be an advantage.