Senior PayPal HK Integration Expert for SaaS

Senior PayPal HK Integration Expert for SaaS We’re looking for a senior developer with proven experience integrating PayPal Hong Kong for a SaaS platform. Scope Implement a complete production-ready PayPal subscription system including: * PayPal Checkout * Free trial → automatic subscription * Monthly & quarterly subscriptions * Recurring billing * Subscription management (create, renew, cancel) * Webhooks * Failed payment handling * Smart retries * Payment synchronization * Refunds * Secure backend integration * Production testing Requirements * Strong experience with PayPal REST APIs & Subscriptions API * Experience building SaaS billing systems * Clean, scalable, production-ready code * Ability to deploy and support the integration Please send: * Similar PayPal projects * Tech stack * Estimated timeline * Budget Only developers with real PayPal subscription experience will be considered.