A CryEngine developer designs and develops video games using the CryEngine software, a powerful real-time game development platform. They create realistic, interactive environments, characters, and gameplay elements, using the engine's visual scripting, physics system, and AI tools. They optimize game performance for various platforms, debug and fix issues, and collaborate with artists, designers, and other developers. They also implement game logic and mechanics, and integrate audio and visual effects. A CryEngine developer must have strong programming skills, an understanding of graphics, and knowledge of the game development process.