Job Description

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.

Top Required Skills

• 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

Required Technology Stack

• Java

• Spring / Spring Boot

• REST APIs

• API Gateway

• Microservices

• POS Integration

• PCI / Secure Development Practices

Preferred Skills

• Kafka

• Event-Driven Architecture

• Payment Systems

• CI/CD

• Cloud

• Containers

Key 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.

Important

No SQL requirement.

Requirements

Required Technology Stack

• Java

• Spring / Spring Boot

• REST APIs

• API Gateway

• Microservices

• POS Integration

• PCI / Secure Development Practices

Preferred Skills

• Kafka

• Event-Driven Architecture

• Payment Systems

• CI/CD

• Cloud

• Containers

Key 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.

Important

No SQL requirement.