Stealth Remote Control Program Development

I'm seeking an experienced developer to create a Windows remote control program for remote support. The program should have a basic, minimalistic UI and include the following core features:

Core Requirements:
- Control mouse and keyboard
- Share screen
- Hear device sound and speaker output
- Transfer files
- Fully encrypted screen sharing using RSA

Stealth Requirements:
- Must not appear in task manager
- Device process should be hidden, as if no program is running

Ideal Skills and Experience:
- Proficiency in Windows application development
- Strong understanding of encryption protocols, especially RSA
- Experience with screen sharing and remote control software
- Knowledge of file transfer protocols
- Ability to implement stealth features

Please provide a portfolio showcasing similar work. Looking to get this done ASAP and within budget.