AI-Powered Content Generator Web App Development

I need a developer to build a web app on Bubble or buildship or others that leverages OpenAI's GPT to create social media content. The app will provide hooks, captions, and scripts based on my provided formulas.

Essential Features:
- Landing page with feature-based subscription tiers
- User signup/login
- Stripe payment integration for SaaS subscriptions
- GPT-4 integration (via API or Buildship)
- User dashboard for inputting prompts and receiving generated content

Requirements:
- Proficient in OpenAI API, Bubble, and Stripe setup
- Strong design skills for a clean, responsive interface
- Delivery within 2-3 weeks is crucial

To apply, please send:
1. Relevant portfolio examples
2. Recommended tech stack
3. Estimated cost and timeline