Software Engineer II

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

• 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