Full Stack Developer Needed for AI-Powered Fitness Mobile Application (React Native + Node/Python)

We are looking for an experienced Full Stack Developer to build a cross-platform (iOS & Android) AI-powered fitness mobile application. The app will feature personalized workout generation, dynamic nutrition plans, and interactive AI coaching routines, so prior hands-on experience with LLM API integrations (like OpenAI) is essential. We already have the complete UI/UX design ready, and your primary role will be pixel-perfect frontend development along with a secure, scalable backend (Node.js/Python or Firebase/Supabase). Experience with subscription management (in-app purchases) and clean state management is required. If you have previously developed mobile apps in the fitness or AI niche, please share live links to your work on the App Store or Google Play along with your proposal.