Payment Engineer II: EMV & Tokenization

EBizCharge; Northern (KY); Hybrid; USD 95,000 - 135,000; Full time

Job summary

EBizCharge, headquartered in Irvine, CA, seeks a Software Engineer II to build secure payment solutions across EMV terminals, backend services, and integrations. You will work with Kotlin on Ingenico devices and collaborate with gateway APIs to deliver reliable, compliant payment flows.

The role emphasizes EMV certification, tokenization, and end-to-end transaction handling, with opportunities to grow toward senior payments engineering.

Qualifications

• 2-4 years of professional software development experience.
• Experience working on payment systems, financial systems, or API integrations.
• Understanding of the payment transaction lifecycle (authorization through settlement).
• Strong debugging and problem-solving skills in production environments.
• Ability to work collaboratively in cross-functional teams.

Responsibilities

• Develop and maintain Ingenico terminal applications using Kotlin and Ingenico SDK.
• Integrate terminal software with host systems and gateway APIs.
• Troubleshoot device-level issues, EMV kernel interactions, and transaction failures.
• Assist with firmware updates and terminal configuration management.
• Contribute to secure RESTful APIs using .NET/ASP.NET core.
• Implement core payment workflows: authorization, capture, refund, void, and settlement.
• Support integrations with payment processors and gateways.
• Build and maintain device management services (registration, monitoring, configuration).
• Implement webhook listeners and event-driven payment updates.
• Support batch settlement, reconciliation, and reporting processes.
• Participate in production troubleshooting and reliability improvements.

Skills

Kotlin

EMV payment systems

RESTful APIs

CI/CD

AWS

Debugging

Tools

Ingenico SDK

Azure/AWS

Job description

EBizCharge, headquartered in Irvine, CA, seeks a Software Engineer II to build secure payment solutions across EMV terminals, backend services, and integrations. You will work with Kotlin on Ingenico devices and collaborate with gateway APIs to deliver reliable, compliant payment flows.

The role emphasizes EMV certification, tokenization, and end-to-end transaction handling, with opportunities to grow toward senior payments engineering.