Mobile Developer (iOS and Android)

As a Mobile Developer at Circadia Health you will play a critical role in designing developing and maintaining native iOS and Android applications that support sensitive healthcare platforms. You will be proficient in Swift for iOS and Kotlin for Android with a deep understanding of mobile architecture patterns performance optimization and platform-specific design guidelines. You will also be familiar with React/TypeScript.

Your expertise in Test-Driven Development (TDD) security best practices and comprehensive documentation will ensure the reliability scalability and security of our mission-critical mobile applications. Your work will directly impact patient care and enhance the efficiency of clinical staff by contributing to a platform that serves 30k patients daily through our Circadia Contactless Monitor (IoT devices)a number expected to scale beyond 100k in the next 2 to 3 years.

iOS Development:

• Build develop and maintain native iOS applications using Swift SwiftUI and UIKit.

• Implement modern iOS architecture patterns (MVVM MVI Clean Architecture) and reusable components.

• Optimize app performance memory usage and battery consumption across iPhone and iPad form factors.

• Ensure adherence to Apples Human Interface Guidelines and App Store submission requirements.

Android Development:

• Build develop and maintain native Android applications using Kotlin and Jetpack Compose.

• Implement modern Android architecture components (ViewModel LiveData Room Navigation) and reusable UI patterns.

• Optimize app performance and ensure compatibility across a wide range of Android devices and OS versions.

• Ensure adherence to Material Design guidelines and Google Play Store submission requirements.

API & Backend Integration:

• Integrate mobile applications with RESTful APIs and real-time services to support healthcare workflows.

• Collaborate with backend engineers to define API contracts and ensure efficient secure data exchange.

• Implement robust offline support caching strategies and synchronization for intermittent connectivity scenarios common in clinical environments.

IoT & Device Connectivity:

• Develop and maintain communication layers between mobile apps and the Circadia Contactless Monitor (IoT devices) including BLE Wi-Fi and cloud-based protocols.

• Work with AWS IoT and related services to enable real-time device telemetry configuration and updates from mobile.

• Build interfaces for device pairing provisioning and diagnostics that clinical staff can use confidently.

AWS Expertise:

• Integrate mobile applications with AWS services (Cognito Pinpoint IoT MSK) for authentication push notifications and real-time data streaming.

• Implement robust authentication and authorization protocols including OAuth JWT and biometric authentication.

• Manage push notification infrastructure across APNs and FCM through AWS Pinpoint.

Test-Driven Development (TDD):

• Write unit tests and integration tests using XCTest (iOS) and JUnit/Espresso (Android) to ensure code quality and reliability.

• Implement UI testing with XCUITest and Android Espresso for end-to-end validation.

• Conduct code reviews and implement best practices for high coding standards across both platforms.

Data Management:

• Manage patient data efficiently on-device using local persistence solutions (Core Data Realm Room SQLite).

• Optimize data queries and synchronization strategies for performance battery efficiency and data integrity.

• Implement secure local storage with encryption at rest for sensitive healthcare information.

Security and Compliance:

• Implement and maintain security measures to protect sensitive healthcare data on mobile devices including secure key storage (Keychain Keystore) certificate pinning and encrypted communications.

• Ensure compliance with healthcare regulations including HIPAA and platform privacy requirements (App Tracking Transparency Android privacy permissions).

• Regularly update mobile applications to address vulnerabilities deprecated APIs and OS updates.

Documentation and Collaboration:

• Create and maintain comprehensive documentation for mobile architecture integration patterns and release processes.

• Maintain detailed change logs version histories release notes and onboarding guides.

• Manage CI/CD pipelines for mobile (Fastlane Xcode Cloud GitHub Actions) and coordinate App Store and Play Store releases.

• Advanced knowledge of Swift and the iOS SDK including SwiftUI UIKit Combine and async/await.

• Advanced knowledge of Kotlin and the Android SDK including Jetpack Compose Coroutines and Flow.

• Strong understanding of mobile architecture patterns (MVVM MVI Clean Architecture) and dependency injection.

• Experience integrating with RESTful APIs and real-time data sources (WebSockets MQTT server-sent events).

• Understanding of AWS services relevant to mobile (Cognito Pinpoint IoT MSK).

• Deep understanding of user-centered design principles design thinking methodologies and usability best practices specific to mobile.

• Knowledge of HTTP(S) as a protocol including TLS certificate pinning and authentication flows.

• Strong understanding of mobile security best practices including secure storage biometric authentication and data protection.

• Experience with TDD and mobile testing frameworks (XCTest JUnit Espresso).

• Familiarity with App Store Connect and Google Play Console release workflows.

• Experience with cross-platform frameworks (React Native Flutter Kotlin Multiplatform).

• Proficiency in TypeScript or C for shared logic and bridging components.

• Experience with Google APIs (Maps Health Firebase) and Apple frameworks (HealthKit CoreBluetooth CallKit).

• Experience with mobile DevOps tooling (Fastlane Bitrise Xcode Cloud).

• Design Acumen: Deep understanding of user-centered design principles visual hierarchy and interaction design fundamentals on mobile. Proficiency in translating complex healthcare workflows into intuitive user-friendly mobile interfaces.

• Experience with Bluetooth Low Energy (BLE) and IoT device communication on mobile platforms.

• Detail-Oriented: Responsible for developing applications that handle sensitive healthcare data. Ability to maintain high levels of accuracy and attention to detail in all tasks.

• Communication and Trust: Exceptional communication skills with the ability to collaborate effectively across teams. Ability to maintain the highest levels of confidentiality on a consistent basis.

• Organization and Efficiency: Capable of managing multiple projects release trains and timelines simultaneously across two platforms. Highly organized with a keen eye for detail in all tasks and projects.

• Growth Mindset: Ability to learn from mistakes reflect on them and not repeat them. Curiosity and resilience in the face of setbacks constantly seeking to improve and grow.

• Programming Languages: Swift Kotlin Objective-C (legacy) Java (legacy) TypeScript (optional)

• iOS Frameworks: SwiftUI UIKit Combine Core Data CoreBluetooth HealthKit

• Android Frameworks: Jetpack Compose Android Jetpack Coroutines Room WorkManager

• Cross-Platform (optional): React Native Flutter Kotlin Multiplatform

• Backend Integration: REST GraphQL WebSockets MQTT

• Cloud: AWS (Cognito Pinpoint IoT MSK) Firebase

• Databases: SQLite Core Data Room Realm

• Testing: XCTest XCUITest JUnit Espresso Mockito

• Version Control: Git

• CI/CD: Fastlane Xcode Cloud GitHub Actions Jenkins CircleCI

• Documentation: Confluence Markdown

• Monitoring: Firebase Crashlytics Sentry Prometheus Grafana