Java Developer

Job SummaryWe are seeking an Advanced Software Engineer to support the Omnichannel Payment Platform (OPP) and a new Point-of-Sale (POS) system. This senior-level role will focus on stabilizing the new POS environment, integrating it with OPP, and developing secure, scalable backend services. The ideal candidate will have strong hands-on experience with Java, Spring, Spring Boot, REST APIs, API Gateway integrations, enterprise payment systems, and POS environments, with experience in PCI-scoped environments preferred.Key ResponsibilitiesDesign, develop, and maintain backend services using Java and Spring Boot.Support integration of the new POS platform with the Omnichannel Payment Platform (OPP).Develop and support integrations with enterprise API Gateway platforms and downstream services.Troubleshoot and stabilize POS-to-backend and payment processing integrations.Perform hands-on testing and troubleshooting using physical POS terminals and test hardware in the onsite POS lab.Develop secure, scalable, and highly available backend services.Work within PCI-scoped environments and adhere to applicable security and compliance standards.Collaborate with POS, payment, architecture, QA, DevOps, and product teams to resolve integration issues and support delivery.Participate in technical design, code reviews, troubleshooting, and architecture discussions.Develop automated unit and integration tests to ensure reliable and maintainable solutions.Investigate complex integration and production issues and drive them through resolution.Support event-driven architectures and messaging technologies as required.Help establish development and integration practices for the OPP/POS team.Required QualificationsSenior-level experience developing enterprise Java applications.Strong hands-on experience with Java, Spring, and Spring Boot.Experience developing RESTful APIs and backend microservices.Experience with API Gateway integration and enterprise system integrations.Hands-on Point-of-Sale (POS) experience, including working directly with POS terminals or related test environments.Experience working in PCI-scoped, payment, financial, or other security-sensitive environments.Experience developing secure, scalable, and highly available backend services.Experience with automated unit and integration testing.Ability to troubleshoot complex integration and production issues.Ability to work effectively onsite with cross-functional technical teams.Preferred QualificationsExperience with Kafka and event-driven architecture.Experience with payment systems.Experience with CI/CD practices.Experience with cloud technologies.Experience with containerization technologies.