• Developed full-stack SaaS platform for AI-powered thumbnail generation with single-prompt functionality, serving authenticated users through JWT-based secure sessions. • Built React + TypeScript frontend with Tailwind CSS, featuring real-time preview states, customizable design controls (aspect ratios, styles, color palettes). • Designed Express.js backend with MongoDB integration, implementing user authentication, protected API routes, and Gemini AI service layer for dynamic thumbnail generation and storage. • Architected scalable data models for users and thumbnails, with planned features including credit systems, generation history retrieval, and payment integration.