Senior iOS Developer

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Requirements:

• 5+ years of experience in iOS development using Swift (Objective-C is a plus).
• Strong experience building and maintaining SDKs or Frameworks for third-party integration.
• Solid understanding of iOS architecture patterns – MVVM, VIPER, etc.
• Deep knowledge of networking, local storage, and threading on iOS.
• Experience with integrating and handling payments, EMV, or PCI-compliant flows.
• Hands-on experience with Unit/UI Testing, mocking frameworks, and XCTest.
• Familiarity with App Store guidelines, Apple’s human interface guidelines, and SDK distribution (CocoaPods/SPM/XCFrameworks).
• Good understanding of security principles (JWE/JWT, keychain access, biometric authentication, TLS pinning).

Responsibilities:

• Design, build, and maintain the iOS SDK used by merchants and partners to accept payments.
• 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.
• Drive architectural decisions for modular, testable, and reusable code.
• Stay current with Apple iOS SDK, Swift, Xcode, UIKit, and new payment-related APIs (Apple Pay, Passkeys, etc.).
• Work closely with security teams to address vulnerabilities and follow mobile security best practices.