Cross-Platform Digital Wallet App Development

I'm looking for an experienced mobile app developer who has the ability to hire their own team to create a digital wallet application thro wearables. The app should support both iOS and Android platforms. (NDA shall be signed prior to sharing the detailed blueprint)

Key functionalities include:
- Digital wallet with Integration with wearable devices with timely update.

Ideal Skills and Experience:
- Proven experience in developing secure mobile payment applications
- Expertise in cross-platform app development (iOS and Android)
- Familiarity with integrating wearable technology (NFC/RFID)
- Strong knowledge of implementing biometric and other authentication methods

Please provide examples of similar projects you have completed.