Cross-Platform Third-Person Bike Racing Game

I'm seeking an experienced game developer to create an engaging bike racing game app for both iOS and Android platforms. The game should be presented from a third-person perspective and include multiple exhilarating modes: single-player, multiplayer, and time trial.

Key Requirements:
- Cross-platform compatibility (iOS and Android)
- Third-person perspective
- Game modes: single-player, multiplayer, time trial

Ideal Skills and Experience:
- Proven experience in developing mobile games
- Strong understanding of multiplayer game mechanics
- Expertise in 3D graphics and animations
- Familiarity with both iOS and Android development environments

Please provide a portfolio showcasing similar projects and an estimated timeline for completion. Looking forward to your bids!