Cross-Platform FPS Shooter Development

I'm looking for an experienced game developer to create a first-person shooter (FPS) game. The game should be available on PC, console, and mobile platforms, and feature robust online multiplayer functionality.

Key Requirements:
- First-person perspective
- Available on PC, console, and mobile
- Online multiplayer functionality

Ideal Skills and Experience:
- Strong background in game development, especially in FPS titles
- Experience with cross-platform compatibility
- Knowledge of online multiplayer systems and networking
- Proficiency in relevant game engines (e.g., Unity, Unreal Engine)
- Ability to create engaging and balanced multiplayer gameplay

Please provide your portfolio and relevant experience.