Web Developer Needed for Custom Subscription Checkout with API Integration

We are looking for an experienced full-stack web developer to build a custom online subscription checkout page for our existing website. The solution will allow customers to purchase recurring subscription plans online through a seamless and secure checkout experience. It must integrate with a third-party platform using REST APIs to create and manage subscriptions, synchronize customer data, and process recurring billing. The project includes subscription plan selection, customer information collection, secure recurring payment processing, Apple Pay and Google Pay integration, a confirmation/receipt page, and a reliable backend API integration with the external service. This is more than a simple website or design project. We need someone with proven experience building custom API integrations, ecommerce checkout flows, subscription management, recurring billing, and secure payment processing. API documentation and integration details will be provided at the start of the project. Remote applicants are welcome. Strong communication skills and the ability to deliver clean, well-documented, production-ready code are important. When applying, please include: Examples of similar API integration or ecommerce checkout projects you've completed. Your experience with recurring subscription systems and payment gateways. The technologies and frameworks you recommend for this project. An estimated timeline to complete the implementation.