Modify Android App for Location Spoofing

I need an experienced Android developer to modify an existing app. The app currently detects fake location apps and developer mode.

Requirements:
- Bypass detection of developer mode
- Conceal use of mock location apps
- Maintain app functionality after modifications

Ideal Skills:
- Expertise in Android app development
- Experience with location services and spoofing
- Knowledge of security and detection evasion techniques

Please share relevant experience and estimated time to complete.