AI-Powered Document Interpretation Platform -- 2

PROJECT TITLE:
Build Secure AI-Based Report Processing Platform (React + Node/Python + OCR + Payments)


PROJECT DESCRIPTION:

We are building a secure web platform where users can upload reports and receive simplified AI-generated explanations.

This is NOT a basic CRUD or simple API integration project. It involves a multi-stage processing pipeline, strong backend architecture, and strict security requirements.

Core Functionalities:

1. File Upload System
- Secure upload (PDF, images)
- File validation, deduplication, and storage
- Temporary + permanent storage logic

2. Processing Pipeline (Two-Stage)
- Stage 1: OCR + basic preview (low-cost)
- Stage 2: Full AI processing (after payment)
- OCR reuse between stages
- Queue-based job processing

3. OCR & Data Extraction
- Extract structured data from reports
- Handle tables, units, and reference ranges
- Normalize and validate extracted data

4. AI Interpretation Layer
- Generate simplified explanations (non-diagnostic)
- Deterministic output with strict guardrails
- Schema-based structured output

5. Payment Integration
- Razorpay or Stripe
- Webhook-based verification (no frontend trust)
- Pay-per-report + subscription plans

6. Dashboard System
- Report listing, status tracking
- View, download, share reports
- Access control based on user plan

7. Security & Access Control (CRITICAL)
- Signed URLs for file access
- Role-based access
- Strict validation (ownership → access → status)
- Anti-abuse, rate limiting, and logging

8. System Requirements
- Idempotent APIs (uploads, payments, processing)
- Queue system (Redis/BullMQ or equivalent)
- Scalable architecture
- Clean database schema design


TECH STACK (Flexible but preferred):
- Frontend: React
- Backend: Node.js OR Python (FastAPI/Django)
- OCR: Tesseract / Google Vision API / equivalent
- AI: OpenAI or similar
- Database: PostgreSQL
- Queue: Redis + BullMQ / Celery
- Storage: AWS S3 / Cloudflare R2


IMPORTANT:
A detailed PRD will be shared once project is awarded. Please review before submitting your proposal.
Generic or copy-paste bids will be ignored.


WHO WE ARE LOOKING FOR:

- Experienced full-stack developer OR small team
- Strong backend/system design experience
- Experience with:
- File handling & storage systems
- Payment integrations (webhooks, idempotency)
- Queue/job processing systems
- Secure API design

This project requires real engineering experience, not just API integration.

IMPORTANT INSTRUCTIONS FOR PROPOSALS:

- To confirm that you have carefully read and understood the project requirements, please begin your proposal with the words: "WEB GUY".

- Proposals that do not follow this instruction will be ignored.

- The price you quote in your bid will be considered final. No increase in budget will be entertained after the project has been awarded.

- Please review the full requirements and scope carefully before submitting your bid.