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.

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.