Develop engaging playable ads for mobile games, primarily focusing on Last Day on Earth. Responsibilities include creating game mechanics, animations, and effects within the ads, optimizing them for various ad networks, and experimenting with new technologies to boost user engagement. Requires 3+ years of experience in playable ads or HTML5 game development, proficiency in JavaScript/TypeScript, and familiarity with game engines like Cocos Creator, Babylon.js, or ThreeJS+PixiJS. Experience with Git, basic image editing software (Photoshop/Figma/Blender), and performance optimization is essential. A portfolio showcasing relevant work is required.