Mobile Developer (iOS and Android)

Overview

Circadia Health is a rapidly scaling, Series B healthcare AI company transforming senior care through predictive analytics and agentic AI workflows across 300+ skilled nursing facilities and expanding into home health and hospice.

We are looking for a seasoned Executive Assistant to serve as a force multiplier across people, culture, and executive coordination. This is not a task-execution role — it is an ownership role. You will keep the company running smoothly, our people well-supported, and our leadership well-prepared, while also handling select personal and logistical matters for the CEO with discretion and care.

The right candidate brings deep experience supporting complex executives and high-growth organizations, a natural instinct for anticipating needs before they arise, and the entrepreneurial mindset to build systems and processes where none yet exist.

The Role

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.

Core Responsibilities

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 Apple's 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 stor