Job description
Headquartered in Irvine, California, EBizCharge specializes in developing integrated payment solutions that facilitate electronic payment processing within ERP, CRM, Mobile, and eCommerce applications. Our applications are PCI compliant and fully integrated with major ERP/accounting systems, including QuickBooks, Sage, SAP Business One, Microsoft Dynamics, NetSuite, Epicor, Acumatica, and major online shopping carts, including Magento and WooCommerce. EBizCharge offers its employees tremendous learning opportunities, career growth potential, and a dynamic work environment.
We are seeking a Software Engineer II to join our growing team. This role is focused on building and supporting secure payment solutions across EMV terminals, backend services, and integrations. The ideal candidate has experience working on payment systems or processor integrations and is interested in deepening their expertise in EMV certification, tokenization, and end-to-end transaction flows. This engineer will collaborate closely with senior team members to deliver reliable, compliant, and scalable payment solutions.
Responsibilities
EMV Terminal & Device Development
Develop and maintain Ingenico terminal applications using Kotlin and Ingenico SDK
Implement EMV transaction flows (contact, contactless, NFC, wallet)
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
Backend Payment Services (.NET)
Contribute to the development of secure RESTful APIs using .NET/ASPE.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
EMV Certification & Processor Integration
Contribute to EMV Level 3 certification efforts by executing test cases and validating transaction flows
Assist in validating host message formatting and transaction responses
Troubleshoot processor-level declines and edge cases with guidance from senior engineers
Support regression testing and re-certification activities
Collaborate with internal teams and external processors during certification cycles
Tokenization & Wallet Integration
Support implementation of network tokenization flows (Visa, Mastercard, Amex)
Assist with token lifecycle management (provisioning, updates, de-tokenization)
Support integrations for Apple Pay and Google Pay
Ensure payment flows adhere to card network and security requirements
Mobile Payment Integration
Support Android-based mobile payment integrations using Kotlin
Integrate payment SDKs and troubleshoot mobile transaction issues
Assist with mobile wallet provisioning and transaction flows
Qualifications
2-4 years of professional software development experience
Experience working on payment systems, financial systems, or API integrations
Experience building RESTful APIs using .NET / ASP.NET core
Experience developing Android applications using Kotlin
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
Preferred Qualifications
Exposure to EMV Level 3 certification processes
Experience integrating with payment processors or gateways
Experience with Ingenico devices and SDKs
Familiarity with PCI-DSS compliance concepts
•Experience with AWS or Azure
Experience with CI/CD pipelines and automated deployments
Prior fintech or payment industry experience
Technical Environment
•Terminal Software: Ingenico SDK, Kotlin
•Backend: .NET 6+ / ASP.NET Core
Mobile: Android SDK integration (Kotlin)
•Cloud: AWS or Azure
Payments: EMV, Tokenization, Webhooks, Batch Settlement
Growth Opportunity
This role provides hands-on experience with EMV Level 3 certification, processor integrations, and tokenized payment systems, offering a strong growth path toward senior payments engineering roles.
Job Type: Full-time
The Company is committed to compliance with all applicable laws providing equal employment opportunities. This commitment applies to all persons involved in Company operations. The Company prohibits unlawful discrimination against any job applicant, employee, or unpaid intern by any employee of the Company, including supervisors and coworkers. Pay discrimination between employees of the opposite sex or between employees of another race or ethnicity performing substantially similar work, as defined by the California Fair Pay Act and federal law, is prohibited.
Originally posted on Himalayas
Who can apply
Eligible countries: United States. Accepted UTC offsets: UTC-10, UTC-9, UTC-8, UTC-7, UTC-6, UTC-5, UTC+14. Review the full description for employer-specific work authorization, residency and schedule requirements.