Seeking a Full-Stack Developer to Develop an AI-Based SaaS Product

We are looking for an experienced Full-Stack Developer to build an AI-powered SaaS invoicing platform designed for freelancers, consultants, and small businesses. The platform will allow users to generate professional invoices using simple natural-language prompts instead of manually filling out traditional invoice forms. We are looking for a developer who can build a modern, secure, scalable, and user-friendly SaaS application. Key Features & Requirements -AI-Powered Invoice Generation: Integrate OpenAI API or a suitable LLM to convert natural-language prompts into structured invoices. -Invoice Management: Create, edit, delete, preview, download, and manage invoices. -PDF Generation: Generate professional, branded PDF invoices. -User Authentication: Secure registration, login, and account management. -Business Profiles: Create and manage business information, logos, tax details, and branding. -Client Management: Save and manage client information for reusable invoices. -Dashboard & Analytics: Track total invoices, paid, unpaid, overdue invoices, and revenue summaries. -Subscription Management: Implement Free, Professional, Business, and Enterprise plans with feature-based access control. -Payment Integration: Integrate Stripe for subscription payments and billing management. -Multi-Currency Support: Support USD and EUR initially, with flexibility for additional currencies. -Invoice Tracking: Manage invoice statuses, payment due dates, and payment terms. -Responsive UI/UX: Build a clean, modern interface with an intuitive AI chat-based invoice creation experience. -Security & Scalability: Implement secure data access, user-level data isolation, and scalable backend architecture. Preferred Technology Stack Frontend: React.js / Next.js, TypeScript, Tailwind CSS Backend: Node.js, Express.js / NestJS Database: PostgreSQL or MongoDB AI Integration: OpenAI API / LLM Payment: Stripe Infrastructure: AWS, Vercel, or equivalent We are open to technical recommendations if you can justify a better approach. Ideal Candidate Proven experience developing full-stack SaaS applications, with strong expertise in AI API and LLM integrations, subscription-based platforms, Stripe, backend architecture, and database design. Experience building secure, scalable, production-ready applications is essential. Experience with invoicing, accounting, or financial management platforms will be a plus. To Apply Please share your relevant SaaS and AI-powered projects, recommended technical approach, and experience with similar platforms. We are looking for a reliable developer who can take ownership of the development and help us build a high-quality SaaS product.