Senior Full Stack Developer (React + AI Personalization)

Project Overview We have: Quiz flow completed Design mockups AI-generated nutrition plans Supplement recommendations Existing React application We need an experienced developer to help implement and optimise: Personalised quiz experience AI-generated results pages Dynamic supplement recommendations Conversion-focused checkout flow User dashboard experience What You'll Build Quiz Experience Multi-step assessment flow Conditional logic Dynamic questions Progress indicators Mobile-first UX AI Results Page Generate highly personalised reports based on user responses. Examples: Personal metabolic profile Weight loss projections Hormonal insights Personalised nutrition targets Behavioural recommendations Supplement recommendations The user should feel: "This plan was built specifically for me." Personalised Checkout Dynamic bundles Subscription offers Upsells A/B testing support Conversion optimisation Member Dashboard Daily protocol Progress tracking AI chat assistant Subscription management Order tracking Technical Requirements Must Have: React Next.js TypeScript Tailwind CSS API integrations AI prompt engineering experience Strong UX understanding Nice To Have: OpenAI Claude Vercel Shopify Subscription commerce Health & wellness experience CRO experience What Success Looks Like You think beyond development. You challenge assumptions. You improve conversion rates. You understand customer psychology. You care about creating experiences that users actually complete. You can take a rough idea and turn it into a polished product.