Token Management App Development

I'm looking to develop a Token Management App for Android and Web platforms. The primary users will be salesmen. The app should allow us to issue tokens to customers, enable advance gift redemption (negative tokens), and provide real-time tracking features for both salesmen and admin.

Key Features:
- Token Issuance: Admin can issue tokens to customers.
- Advance Gift Redemption: Allow customers to redeem gifts in advance using negative tokens.
- Real-time Tracking:
- Salesmen's location tracking.
- Token redemption tracking.

Ideal Skills and Experience:
- Experience in mobile and web app development, particularly on Android.
- Proficiency in implementing real-time tracking features.
- Strong backend development skills to manage token transactions and data.
- Familiarity with user-friendly UI/UX design.

Please share your portfolios and relevant experience.