Senior Java Developer

Senior Java Developer

Blue Ash, OH

LOCAL Needed as for Onsite interview

Non-Negotiables:
- Local candidates only (must be able to do F2F interview)
- Senior-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




Technology Stack Required:
Java, Spring, Spring Boot, REST APIs, API Gateway, Microservices, POS Integration , PCI/Secure Development Practices




Preferred / Negotiable:
Kafka, Event-Driven Architecture, Payment Systems, CI/CD, Cloud, Containers




***NO SQL




Duration:
6-month contract




Job Description:
We are seeking an Advanced Software Engineer to join a newly established team supporting the Omnichannel Payment Platform (OPP) and a new Point-of-Sale (POS) system. This senior-level consultant will play a critical role in stabilizing the new POS environment and integrating it with OPP.




The ideal candidate will have strong hands-on experience with Java, Spring/Spring Boot, backend services, API Gateway integrations, and enterprise payment systems, along with practical POS experience. Experience working in PCI-scoped environments is highly valued.




Key Responsibilities:




- Design, develop, and maintain backend services using Java and Spring Boot.
- Support the 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, adhering to applicable security and compliance standards.
- Collaborate with POS, payment, architecture, QA, DevOps, and product teams to resolve integration issues and accelerate 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 newly formed OPP/POS team.