Description We're seeking a Senior Backend Engineer to design and deliver scalable, secure payment and platform integrations using Java and Spring Boot. This role focuses on building resilient backend services, integrating with leading payment providers, and operating containerized services at scale. What You'll Do Build and own end-to-end payment integrations (Braintree/PayPal, Venmo, Klarna, and similar).Develop Spring Boot REST and GraphQL services supporting modern React applications.Implem