Looking for Django Backend Developer for Mass Mailing Platform (with Payment Gateway)

I'm building a backend-only platform in Django for a mass mailing system aimed at HR and Bench Sales recruiters. It includes user roles like Super Admin, Company Admin, HR Recruiter, and Bench Sales Recruiter — each with specific features and limits.

Key Features:
- User authentication with role-based access
- Credit-based mass mailing system with usage limits
- Contact upload (CSV) and email tracking
- Company admin tools to manage users & credits
- Super Admin panel to manage everything
- Feedback form, help desk, and auto-delete old mails
- Payment gateway integration (Stripe or Razorpay)

Tech Stack:
- Django + DRF
- PostgreSQL/MySQL
- Payment API (Stripe/Razorpay)
- (Optional) Celery/Docker for background tasks

Looking for:
- Experienced Django backend devs
- Clean, production-ready code
- 4–6 weeks timeline

Please start your bid with [REALMAIL] so I know you’ve read the full brief.