Advanced Contact Manager: Android App

I'm in need of a seasoned Android developer to craft an Advanced Contact Management App. This application should include:

• Dual-column list view
• Contact grouping

Consistent with the concept of Material Design, the app should exhibit a sleek, modern aesthetic.

As data security measures were not specified, offer any industry standards for user data protection in your quotation.

Ideal candidates should have the following skills and qualifications:

• Extensive experience in Android App development
• Solid understanding of Material Design principles
• Familiarity with developing advanced contact management features
• Knowledge in implementing industry standard data security measures.