Full-Stack Developer for Premium Fintech Platform

I am looking for an experienced full-stack web developer/team to build a complete, modern and premium financial platform called Investora. The goal is to create a highly professional, trustworthy and mobile-responsive platform with a smooth user experience, secure account management, payment processing, portfolio tracking and a comprehensive admin panel. Important: The business model and regulatory/compliance structure will be reviewed separately with appropriate professionals. The developer’s responsibility is primarily the technical design and implementation of the platform. Core Features 1. User Website * Premium, modern and trustworthy UI * Home/Landing page * About, How It Works, FAQ, Contact * User registration/login * Forgot/reset password * User profile * KYC/document upload capability * Responsive design for mobile, tablet and desktop 2. User Dashboard * Account overview * Balance/portfolio overview * Transaction history * Individual plan/product details * Start date and end date * Amount/value tracking * Monthly performance/value history * Status of active/completed transactions * Downloadable statements/receipts 3. Payment System * Payment gateway integration * UPI * Cards * Net banking * Payment success/failure handling * Automatic transaction records * Webhook integration * Refund handling where applicable For development, a sandbox/test payment environment should be used initially. 4. Admin Dashboard * User management * KYC/document management * Transaction management * Payment monitoring * Product/plan management * User portfolio overview * Reports and analytics * Notifications * Content management * System settings * Audit logs 5. Security Security is extremely important. The platform should include: * Secure authentication * Password hashing * Role-based access * Admin/user permission separation * API security * Input validation * Protection against common web vulnerabilities * Secure payment implementation * Database security * Audit logging * Rate limiting where appropriate Suggested Technology Developer can suggest the final stack, but I am considering: * Frontend: Next.js / React + TypeScript * Backend: Node.js / Next.js API * Database: PostgreSQL * ORM: Prisma * UI: Tailwind CSS * Authentication: Secure session/JWT-based authentication * Deployment: Vercel/AWS or suitable alternative I am open to better technology recommendations from an experienced developer. What I Expect From the Developer * Complete frontend + backend development * Database architecture * API development * Admin panel * Payment gateway integration * Authentication * Responsive design * Security implementation * Testing and bug fixing * Deployment assistance * Clean and maintainable source code * Proper documentation * Handover of complete source code and project files Important Requirements Please apply only if you have experience with fintech, payment platforms, dashboards, marketplaces or other applications involving sensitive financial/user data. When applying, please provide: 1. Examples of similar projects you have built 2. Your recommended technology stack 3. Estimated development timeline 4. Fixed-price or milestone-based quotation 5. What will be included/excluded 6. Payment gateway experience 7. Security practices you follow 8. Whether you work individually or as a team I prefer a milestone-based development approach, starting with UI/architecture and then progressing to backend, payments, dashboards, testing and deployment. Please do not submit generic proposals. I want developers who have actually built complex web applications and can explain how they would approach this project.