Backend Developer: Integrate Stripe, OpenAI, Supabase in Next.js AI App id-12162
We are building an innovative web application designed to help students learn more effectively. Using AI, the app transforms uploaded study materials (PDFs, DOCX, etc.) into interactive notes, quizzes and flashcards.
We have a functional frontend built with Next.js 14 (App Router), TypeScript, and Tailwind CSS.
Current State:
Frontend UI components are largely complete.
Supabase Auth (signup/login) and Supabase Storage (file uploads) are functional.
A basic Prisma schema exists for the Supabase Postgres database.
What's Missing: The core backend logic, the document processing pipeline (text extraction + AI generation), Stripe payment integration, and full connection between frontend and backend services.
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Core Task & Responsibilities:
We need an experienced backend developer to build the remaining backend functionality and integrate several key services. Your primary responsibilities will include:
Implementing an asynchronous pipeline for processing uploaded documents (text extraction, triggering AI tasks).
Integrating the OpenAI API (using GPT-4o mini for standard tasks, GPT-4o for Pro mode) to generate notes, quizzes, flashcards, and podcast scripts.
Implementing Stripe integration for premium subscriptions (using Stripe Checkout and handling webhooks for payment events).
Building the backend logic for a context-aware Chatbot using document content and OpenAI models.
Developing and managing the database schema and logic using Prisma against our Supabase Postgres database (including user status, generated assets, folder relationships, free tier tracking, Stripe info).
Implementing Supabase Auth session handling securely on the backend.
Building out full Folder Management functionality.
Creating necessary Next.js API Routes or Server Actions to connect the frontend UI to all backend services.
Implementing logic for a free tier (one free note generation) and premium feature gating.
Ensuring robust error handling and status tracking.
Required Tech Stack & Experience:
Must-Have:
Strong experience with Node.js and TypeScript.
Proven experience building backends with Next.js (App Router, API Routes/Server Actions).
Demonstrable experience integrating Stripe API, specifically Subscriptions and Webhooks.
Experience working with the OpenAI API (or similar LLM APIs).
Solid understanding and experience with PostgreSQL and Prisma ORM.
Experience with Supabase (Auth, Database, Storage).
Experience building and consuming RESTful APIs.
Understanding of asynchronous programming patterns (for the processing pipeline).
Nice-to-Have:
Experience setting up background job queues.
Familiarity with React and Tailwind CSS (for better frontend collaboration).
Good communication skills and ability to work from a detailed brief.
Deliverables:
A fully functional backend that powers the application according to the features outlined above and in a detailed handover document (which will be provided to shortlisted candidates). The end result should allow users to sign up, process one document free, upgrade via Stripe, and access all features based on their subscription status.
