Motion Frontend Developer (React) – Mobile Web Game

We are building a mobile-first web game and are looking for a creative frontend developer with strong experience in motion UI, game interfaces and interactive products. This is not a standard website or dashboard. We are looking for someone who can bring interfaces to life through code (CSS/JS) and understands how motion affects game feel, retention, engagement and the user’s desire to continue playing a game. A large part of the work involves creating smooth, engaging game interactions while maintaining high performance on low-end Android devices and weak 3G/4G connections. Tech Stack • Frontend: React 16 • Backend: Node.js 16 + Express • Database: MongoDB What You'll Be Working On The product contains many game-related interactions and motion systems, including: Boxes, Spins, Prize reveals, Fortune Wheel, Pop-ups, Transitions and micro-interactions, XP / progression feedback, Notifications, Avatar reactions All of this needs to be implemented with taste, quality, and high performance. Animations must be smooth, lightweight, and stable on low-end Android devices and poor internet connections. Our primary approach is CSS/JS animations using transform and opacity, without heavy libraries or heavy assets. Responsibilities • Implement the motion frontend according to specifications • Incorporate designer feedback and revisions • Correctly handle spin results, prize reveals, balance updates, XP, collection progress, and notifications • Integrate the frontend with the existing backend and connect everything to game events • Synchronize with the backend developer on API, game flow, states, and event tags • Maintain high FPS and fast response times across the product What We're Looking For • Strong React experience • Strong experience with motion UI and game interfaces • Experience building motion-heavy and highly interactive products • Strong understanding of CSS/JS animations and performance optimization • Ability to integrate frontend with backend APIs and event-driven systems • Ability to move fast, make pragmatic decisions, and suggest simplifications when needed Engagement • Full-time preferred • Or intensive part-time for 1-2 months • Fast execution is needed We Provide • Frontend specification • Motion brief • Design files and designer support • Game logic documentation • Access to the backend developer for API synchronization and integration Key Requirements 1 Strong experience with motion UI and game interfaces. 2 Performance-first approach to animation development. 3 Confident frontend integration with backend systems and game events. Please send examples of motion-heavy products, game UI, game-like interfaces, or highly interactive frontend work you have built. What's your availability during the next 6–8 weeks?