Senior iOS Developer

Xident B.V.; Union, Northern (NJ, KY); Hybrid; USD 130,000 - 170,000; Full time

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.

Skills

iOS development

Swift

AVFoundation

Camera pipelines

Core ML

SDK development

Security frameworks

CocoaPods/SPM

SDK versioning

Vision framework

Tools

Vision framework

Job description

We're building a native iOS SDK that brings Xident's "Verify Once" experience to mobile apps. You'll create a production-grade Swift SDK with camera-based liveness detection, on-device age classification via Core ML, and seamless document capture — all running privately on-device.

Xident is building the future of digital identity verification. Our platform enables businesses to verify users' ages and identities in seconds, while respecting privacy through our unique "Verify Once, Access Everywhere" model.

Founded in 2023, we've already processed over 10M+ verifications processed and serve 500+ businesses. We're a remote-first company with team members across 12 countries.

Our mission is simple: To make identity verification seamless, private, and accessible for everyone. We believe privacy and convenience shouldn't be mutually exclusive, and we're proving it every day.

25+

Team members

500+ businesses

Customers

12

Countries

What You'll Do

• 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

What We're Looking For

• 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

Nice to Have

• Experience with Vision framework for face detection and document scanning
• Background in identity verification or biometric applications
• Familiarity with WebAuthn/passkeys on iOS

Our Hiring Process

We respect your time and aim to complete the entire process within 2-3 weeks. Here's what to expect:

1

Application Review

Application Review

3-5 days

Our team reviews your application within 5 business days. We look for relevant experience, passion for our mission, and alignment with our values.

2

Initial Call

Initial Call

30 minutes

A 30-minute video call with our recruiting team to learn about your background, discuss the role, and answer your questions about Xident.

3

Technical Assessment

Technical Assessment

1-2 hours

Role-specific evaluation—this might be a coding challenge, portfolio review, case study, or technical discussion depending on the position.

4

Team Interviews

Team Interviews

2-3 hours

Meet with 3-4 team members including your potential manager and cross-functional partners. We assess technical skills, collaboration, and culture fit.

5

Final Interview

Final Interview

45 minutes

A conversation with a company leader to discuss your career goals, our vision, and ensure mutual fit. This is also your chance to ask strategic questions.

6

Offer

Offer

24-48 hours

If it's a match, we move quickly. Expect a competitive offer within 48 hours of your final interview, with clear details on compensation and equity.

Our Values

Privacy by Design

We iterate quickly, gather feedback, and improve continuously.

Ownership Mentality

Everyone owns their domain end-to-end. No finger-pointing, just solutions.

Transparent by Default

We're happy to answer any questions before you apply. Reach out to our team anytime.