Playful Gaming Social App Design

I'm looking for a talented website and mobile app designer to create a playful, engaging social networking platform centered around gaming. The platform should be designed to facilitate multiplayer challenges, display leaderboards, and support in-game purchases.

Key Requirements:
- E-commerce capabilities for in-game purchases
- Social networking functionalities like user profiles, messaging, and a news feed
- Gamification elements such as multiplayer challenges and leaderboards

Ideal Skills and Experience:
- Proven experience in designing e-commerce and social networking platforms
- Strong understanding of gaming dynamics and user engagement
- Expertise in UI/UX design for both web and mobile applications
- Familiarity with integrating secure payment systems for in-game purchases

Please provide a portfolio showcasing similar projects.