Hiring: Senior Software Engineer (Card Present) Company: EBizCharge Location: Irvine, CA Job Posted Time: 2026-09-16 12:35:09 Employment Type: Full-time Target Skills & Keywords : .NET, C#, Configuration Management, Encryption, Firmware, Magento, NetSuite, PCI DSS, REST, RESTful, SAP, Stripe, WooCommerce About the job Required Skills: •Design, develop, and maintain backend services that manage communication between payment terminals and our processing infrastructure, supporting EMV chip, NFC/contactless, and magnetic stripe transaction flows. •Integrate with device management platforms and terminal SDKs including solutions such as Clover, Stripe Terminal, Square, and similar off-the-shelf card present providers, adapting their APIs to fit our platform architecture. •Implement and maintain device hub capabilities including terminal provisioning, configuration management, firmware coordination, and health monitoring. •Own and drive EMV Level 3 certification efforts in partnership with payment networks and device vendors, coordinating test plans, managing certification tooling, and resolving certification findings. •Design and build card-present infrastructure with international markets in mind, accounting for regional EMV implementation differences, multi-currency support, and varying certification requirements across acquiring markets. •Build scalable, maintainable backend services using .NET and C#, adhering to established architectural patterns and contributing to their evolution. •Implement robust retry logic, timeout handling, and graceful degradation to ensure transaction integrity even in the presence of network instability or device failures. •Write secure code that meets PCI DSS requirements across all card-present transaction flows, with a particular focus on cardholder data handling, encryption, and key management. Qualifications: •Strong proficiency in C# and the .NET ecosystem, with experience building production-grade backend services and APIs. •Applied hands-on capability in EMV payment flows including chip, contactless/NFC, and magnetic stripe, ideally including direct involvement in EMV Level 3 certification processes. •Solid understanding of PCI DSS requirements as they apply to card-present environments, including encryption, key injection, and secure cardholder data handling. •Proven ability to build low-latency, high-reliability backend services in a payments or similarly demanding production environment. •Direct experience with Clover, Stripe Terminal, Square, or similar off-the-shelf card present platforms and their developer SDKs. •Operational familiarity with EMV kernel development/ customization, regional EMV certification requirements and acquiring bank differences across international markets. •Background working with Ingenico, Verifone, PAX, or other terminal hardware vendors. Interested candidates, please apply directly through the job posting on company's career page or try via AI auto apply on this platform. Don't miss this opportunity to join a forward-thinking team!