Senior Mobile Application Developer
About the Role
We are seeking a skilled Senior Mobile Application Developer to take ownership of our flagship mobile application. As the sole mobile developer, you will be responsible for evolving an app that pairs with a Bluetooth-enabled pulse oximeter ring to capture overnight sleep data and securely upload it to the cloud.
You will collaborate closely with a team of experienced C#/.NET backend engineers, contributing to backend features related to sleep-study processing and data workflows. This is an opportunity to own a critical mobile product in a modern health-tech environment, working with senior engineers to deliver technology that directly impacts patient outcomes.
Key Responsibilities
* Develop and maintain cross-platform mobile applications using Flutter/Dart for iOS and Android.
* Implement and optimize Bluetooth connectivity with the ring pulse oximeter device.
* Address Android battery optimization challenges to guarantee reliable overnight data collection.
* Manage the release process for both the Apple App Store and Google Play Store.
* Collaborate with backend developers on Azure-hosted .NET services, contributing to backend development when required.
* Ensure compliance with health data security and privacy standards.
* Provide technical leadership within the team.
Requirements
* Professional level English comprehension (spoken, reading/writing)
* 7+ years of professional software development experience, with strong expertise in mobile development.
* Proven experience with Flutter/Dart for cross-platform mobile applications.
* Working knowledge of C# and .NET, with the ability to contribute to backend services.
* Deep understanding of Bluetooth Low Energy (BLE) implementation.
* Experience with Android battery optimization techniques for background processes.
* Successful track record of publishing and maintaining apps in the App Store and Google Play.
* Experience integrating with Microsoft Azure services.
* Familiarity with Firebase (Authentication, Crashlytics, Analytics), Sentry, and PostHog.
* Advanced English communication skills (C1 level), both written and spoken.
* Strong problem-solving abilities and attention to detail.
* Prior experience in health or medical app development is a plus.
Technical Skills
* Primary: Flutter/Dart, Bluetooth LE, iOS, Android
* Secondary: C#, .NET, Azure, Firebase
* Tools: GitHub, Sentry, PostHog, App Store Connect, Google Play Console
What We Offer
* The opportunity to develop innovative health technology with real impact.
* Competitive salary based on experience.
* Professional growth and development opportunities.
* A collaborative team culture that values independence and initiative.