Senior Software Engineer (2)

Position Overview

We are seeking a Senior/Advanced Java Developer to support a newly established team working on an Omnichannel Payment Platform (OPP) and a new Point-of-Sale (POS) system. The consultant will help stabilize the POS environment and integrate it with the OPP platform.

The ideal candidate will have strong hands-on experience with Java, Spring, Spring Boot, REST APIs, backend microservices, API Gateway integrations, enterprise payment systems, and POS environments. Experience working in PCI-scoped or security-sensitive environments is highly valued.

Important

No SQL requirement.

Responsibilities

Design, develop, and maintain backend services using Java and Spring Boot.; Integrate 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 follow applicable security and compliance standards.; Collaborate with POS, payment, architecture, QA, DevOps, and product teams.; Participate in technical design, code reviews, troubleshooting, and architecture discussions.; Develop automated unit and integration tests.; 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.

Requirements

7+ years of senior-level Java development experience; 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 POS terminals or related test environments; Experience in PCI-scoped, payment, financial, or security-sensitive environments; Strong ability to work onsite with cross-functional technical teams; Java; Spring / Spring Boot; REST APIs; API Gateway; Microservices; POS Integration; PCI / Secure Development Practices

Nice to have

Kafka; Event-Driven Architecture; Payment Systems; CI/CD; Cloud; Containers