SaaS AI Trading Signals Backend Development

I'm looking for an experienced backend developer to create the infrastructure for a SaaS AI trading signals platform.

Key Requirements:
- Subscription Tiers: Build three tiers (Basic, Prime, Vision) with varying signal quality and customization.
- Training Tokens: Implement a system to distribute monthly "training tokens" for users to retrain their AI signal bots.
- Payment Integration: Integrate with Stripe for secure transactions.
- User Management: Develop a secure user management system.
- AI Model Training: Set up cloud-based AI model training, preferably using AWS EC2 or SageMaker.
- User Dashboard/API: Create a basic dashboard or API for users to:
- View signal history
- Customize signal preferences
- View subscription details
- User Onboarding: Design an onboarding process including:
- Tutorial for new users
- Initial setup wizard
- Guided tour of the dashboard
- Documentation: Provide comprehensive documentation for the system.
- Scalable Architecture: Ensure the system can scale with user growth.

Ideal Skills & Experience:
- Strong experience in backend development.
- Familiarity with cloud services, especially AWS.
- Experience with payment processor integration, particularly Stripe.
- Knowledge in building user management systems.
- Ability to create user-friendly dashboards or APIs.
- Good documentation skills.

Looking forward to your proposals!