Qiwi Wallet Integration Needed

I require a professional to integrate Qiwi Wallet into an existing platform. The project problems are not specifically defined, so thorough project proposals are encouraged, especially those that detail possible complications and how they could be handled.

Required Skills and Experience:
- Proven success with integrating payment processing systems
- Exceptional problem-solving and analytical thinking abilities
- Thorough and detail-oriented project planning

Functionality:
- While the specific functions are still to be defined, at minimum, the platform should efficiently support Qiwi Wallet transactions.