Crowdfunding Platform

You are a full-stack developer. Build a complete crowdfunding platform similar to Kickstarter/Indiegogo with the following features: 1) Campaign creation with description, funding goal, duration, and rewards tiers, 2) User profiles for creators and backers, 3) Payment processing for pledges with Stripe, 4) Progress tracking with funding visualizations, 5) Backer management and reward fulfillment, 6) Comments and updates from creators, 7) Search and discovery with filters (category, funding status), 8) Featured campaigns and staff picks, 9) Social sharing and referral tracking, 10) Admin dashboard for campaign approval and moderation, 11) Analytics for creators on campaign performance, 12) Email notifications for new backers and campaign updates, 13) All-or-nothing vs flexible funding options, 14) Refund processing for unsuccessful campaigns, 15) Mobile-responsive design. Use React for frontend, Node.js/Express backend, PostgreSQL for data, Redis for caching, and Stripe Connect for marketplace payments. Provide complete code with funding logic and escrow handling.