I am looking for an experienced game developer to port an existing PC-based MMORPG to mobile platforms (Android & iOS). The full source code and all game assets are already available. This is not a remake and not a new game — the task is to adapt and optimize the existing game for mobile devices. The original game is written in C++, with a custom engine and client-server architecture. The project includes real-time multiplayer, character movement, combat systems, skills, items, UI, and networking. Scope of Work: Port the existing PC client to mobile (Android / iOS) Adapt controls for touch input (virtual joystick, buttons, gestures) Optimize performance for mobile hardware (CPU, GPU, memory) Adjust UI/UX for different screen sizes and resolutions Ensure stable client-server communication on mobile Maintain original game logic and mechanics Requirements: Strong experience with C++ Experience in mobile game development (Android / iOS) Knowledge of game engines, rendering, and optimization Experience with networked / online multiplayer games Ability to work with existing large codebases Nice to Have: Experience porting PC games to mobile Familiarity with MMORPG systems Experience with OpenGL / Vulkan / Metal or similar graphics APIs Additional Notes: Source code and assets will be provided after NDA if required Long-term collaboration is possible depending on performance Please include previous similar projects or portfolio links in your proposal This project requires serious technical expertise, so please apply only if you have real experience with game engine-level development.