Senior Full Stack Engineer to Build an AI-Powered SaaS Platform (MERN Stack)

We're building a modern AI-powered SaaS platform and are looking for a senior full stack engineer who can help turn a strong product vision into a scalable, production-ready application. This is not a simple website project. We're looking for someone who has experience building complete web applications and SaaS products, can make sound technical decisions, and is comfortable owning features from planning and architecture through deployment. The platform will combine AI capabilities, workflow automation, user management, dashboards, third-party integrations, and subscription-based functionality. You'll be responsible for building both frontend and backend systems, designing scalable APIs, integrating AI services, and ensuring the product is secure, fast, and maintainable as it grows. Our preferred stack includes React, Next.js, TypeScript, Node.js, Express, MongoDB, Supabase, PostgreSQL, Tailwind CSS, and cloud platforms such as AWS or Vercel. Experience working with OpenAI, Claude, AI agents, RAG-based systems, automation tools like n8n or Make, and SaaS architecture is highly valuable. This is a long-term opportunity for the right person. We're looking for someone who communicates clearly, takes ownership, thinks like a product builder rather than just a coder, and can contribute ideas that improve both the user experience and the technical architecture. We'd also love to hear about the technologies you used and the challenges you helped solve.