Senior iOS SDK Engineer: On-Device Identity & Privacy

Xident B.V.

Union, Northern (NJ, KY)

Hybrid

USD 130,000 - 170,000

Full time

14 days+

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Job summary

Xident is building a native iOS SDK to bring the Verify Once experience to mobile apps. You will craft a production-grade Swift SDK with on-device age classification, camera-based liveness detection, and robust document capture, all running privately on-device.

You will publish SDKs for third-party developers, ensure iOS 16+ compatibility, and contribute documentation and samples. This remote-first role demands deep iOS expertise and strong security know‑how.

Qualifications

7+ years of professional iOS development with Swift.
Deep experience with AVFoundation, camera pipelines, and real-time image processing.
Production experience building SDKs or frameworks consumed by third-party developers.
Understanding of Core ML and on-device model inference.
Strong knowledge of Apple security frameworks — Keychain, biometrics (Face ID/Touch ID), CryptoKit.
Experience publishing to CocoaPods, SPM, and managing SDK versioning.

Responsibilities

Design and build our native iOS SDK in Swift with SwiftUI and UIKit integration.
Implement camera capture pipelines for liveness detection and face analysis using AVFoundation.
Port our ONNX age classification models to Core ML for on-device inference.
Build document capture with real-time edge detection and auto-crop.
Write comprehensive documentation, integration guides, and sample apps for third-party developers.
Ensure compatibility across iOS 16+ and optimize for a wide range of devices.