Experienced C# .NET + Android Developer Needed | Bug Fixing, Key Management Panel -- 2

I am looking to hire a highly experienced developer with strong expertise in C# .NET and Android development.

I already have the source code available, but it contains several bugs that need to be fixed. The project also requires updates to both Web Login and Android Login mechanisms for successful and secure login.

Additionally, the software needs a complete rebranding, along with implementation of a robust Key Management Panel with the following features:

Key Management Features:
Master/Admin/Super/Seller role-based access

Credit Transfer between roles

Key Generation & Renewal

Activation / Deactivation of keys

Key Reset functionality

Tech Stack:
Language: C# .NET (Windows application)

Platform: Android (for mobile login module)

Requirements:
Proven experience in both C# .NET and Android app development

Experience with login systems and security protocols

Good understanding of role-based access systems and license key management

UI/UX improvement ideas are welcome

Deliverables:
Fully functional, bug-free solution

Key management panel with all required features