Senior Backend Engineer, Card-Present Payments

EBizCharge, headquartered in Irvine, CA, is expanding its Card Present platform for in-person transactions. We seek a Senior Engineer with deep payments domain knowledge to lead backend work, EMV certification, and secure integration with payment terminals. You will design scalable services in .NET/C#, integrate Clover/Square/Stripe SDKs, and ensure PCI DSS compliance across all card-present flows while mentoring junior teammates in a dynamic environment.