Senior Mobile Engineer

Who you are

• 8+ years of experience in mobile development, with extensive native experience on iOS (Swift) and/or Android (Kotlin)
• Hands-on experience integrating BLE peripheral devices into production mobile apps, including pairing/bonding, reconnection, background operation, and data throughput (e.g., Core Bluetooth, Android BLE APIs)
• Experience with sensor integration or streaming health data from wearables
• A rigorous approach to reliability: you care about edge cases, device fragmentation, and performance
• Strong communication skills and comfort working in a collaborative, async environment
• Built production React Native apps, or written native modules for React Native or Expo
• Worked with TypeScript and our broader stack (React Native, Expo, GitHub)
• Worked with medical devices, EEG, or wearables
• Worked on apps for clinical trials, patients, or another regulated environment
• Contributed to open source mobile or BLE projects

What the job involves

• As a Senior Mobile Engineer focused on device connectivity, you'll help power Beacon's mission by building the native iOS and Android BLE layer that connects our EEG headbands and other wearables to the apps patients and clinicians rely on
• Your work will determine how reliably we capture high-fidelity data in homes, clinics, and trial sites
• This isn't just another app. You'll build tools that help unlock insights into neurological, psychiatric, and sleep disorders, with the potential to improve lives at scale
• What success looks like:
• As part of our small, mission-driven Mobile Apps Team, you will:
• Lead development of our native iOS and Android BLE device SDKs
• Own connection reliability, data throughput, and battery performance for device communication across a wide range of phones, OS versions, and real-world environments
• Partner closely with our Devices team on firmware interfaces, GATT profiles, and device behavior
• Expose device capabilities to our React Native applications through clean, well-tested native modules
• Own the observability of device connectivity, using telemetry and field feedback from real users to find and fix failure modes
• Help shape the roadmap and technical direction of our mobile platform
• In your first 3–6 months, you might:
• Improve BLE pairing and reconnection reliability across both iOS and Android
• Increase streaming robustness for EEG data, including recovery from dropped connections and backgrounding
• Build the device-side support for a new in-app feature that validates EEG signal quality before data capture
• Add diagnostics that help our Clinical Operations team troubleshoot device issues in the field