Integrate OpenAI API Chat into Existing Web Application

We are building an AI-powered chat feature into our existing Next.js / React web application and need an experienced developer to handle the full integration. We need someone who can connect the OpenAI API securely while making the interface look premium and smooth. Scope of Work The project requires integrating the OpenAI API into our existing React frontend and building a clean, responsive chat user interface using Tailwind CSS. You will be responsible for creating secure backend API routes in Next.js to handle OpenAI requests safely without exposing keys. Additionally, we need token optimization to manage API costs, streaming responses for a real-time typing experience, and proper error handling with loading states. Developer Requirements We are looking for a developer with strong hands-on experience in Next.js and React, alongside a proven track record of OpenAI API integrations. You should write clean, maintainable code and be able to deliver this setup within a fast turnaround timeline. Project Details This is a fixed-price project with a short delivery timeline. Clear communication is required throughout the development process.