We are looking for an experienced developer to upgrade and improve the membership system inside our existing AI SaaS platform. This is a one-time project. The platform is already live. We need help refining and upgrading the current membership logic and subscription structure. Scope of Work: • Review existing membership and subscription setup • Upgrade plan structure (Free / Pro / Enterprise, etc.) • Improve feature gating based on user plan • Fix logic issues related to usage limits or access control • Integrate or improve Stripe subscription handling • Ensure correct upgrade / downgrade behavior • Test edge cases (expired plans, canceled plans, failed payments) • Clean up and refactor related backend code if needed Tech Stack (example): • Backend: Node.js / Python • Frontend: React / Next.js • Database: PostgreSQL / MongoDB • Payments: Stripe • AI features powered by OpenAI API Requirements: • Strong experience building SaaS membership systems • Experience with Stripe subscriptions and webhooks • Solid backend access-control implementation • Ability to quickly understand existing codebase • Clean, structured coding style Project Type: One-time upgrade project. Possibility of future collaboration if work quality is strong. To Apply: Please share: Similar SaaS membership or Stripe projects you handled Your approach to handling subscription logic and access control Estimated timeline Fixed price or hourly rate We are looking for someone reliable, detail-oriented, and experienced in SaaS architecture.