Senior iOS Developer

We are seeking a Senior iOS Developer to join our payments engineering team. You will play a key role in designing and developing a robust, secure, and scalable iOS SDK that powers seamless in-app transactions across our partner ecosystem. You will work closely with product managers, backend engineers, and QA teams to deliver high-quality SDKs that are easy to integrate, developer-friendly, and compliant with the latest security standards (PCI DSS, EMV 3DS, etc.). You will design, build, and maintain the iOS SDK used by merchants and partners to accept payments. You'll develop secure and scalable SDK modules for payment authorization, card/token management, and EMV 3DS authentication; collaborate with backend/API engineers to integrate REST/GraphQL/gRPC APIs; ensure optimal performance, quality, and responsiveness of the SDK across different iOS devices and versions; implement unit tests, UI tests, and CI/CD pipelines to maintain high code quality; and drive architectural decisions for modular, testable, and reusable code.