TWOSENSE.AI is hiring an iOS Engineer to lead the development of a novel iOS application that collects and processes behavioral biometric data for invisible authentication. The app runs in the background to authenticate users based on unique behaviors like walking, swiping, and holding the device, with an initial use case for healthcare professionals.

What You'll Do

Build secure data collection systems for sensors and user interactions with robust background processing capabilities.
Create APIs and frameworks that allow other iOS applications and cloud systems to integrate with the authentication system.
Optimize performance to ensure minimal battery impact while maintaining reliable continuous operation.
Build credential management features using iOS Wallet framework and NFC capabilities to enable instant, tap-based authentication.
Navigate iOS ecosystem challenges including permissions, App Store requirements, and enterprise deployment.

What We're Looking For

4+ years of iOS development experience with apps in production.
Experience with building native iOS apps using Objective-C and Swift.
Deep knowledge of iOS architecture, background processing, and push notifications.
Strong understanding of iOS security features and limitations.
Excellent problem-solving skills and attention to performance details.

Nice to Have

Experience with security products or authentication systems (OAuth/OIDC).
Experience with Core Motion, Core Location, Core Bluetooth, or HealthKit.
Background in behavioral biometrics or continuous data collection.

Technical Stack

iOS, Objective-C, Swift
iOS Wallet framework, NFC
Core Motion, Core Location, Core Bluetooth, HealthKit

Team & Environment

You'll join an engineer-founded team of PhDs and exceptional developers. The company values autonomy, transparency, and technical excellence and is a fast-growing environment with opportunities to shape the company and grow your career.