Senior Mobile Engineer, BLE & Device Connectivity (iOS/Android)

Beacon Biosignals is transforming precision medicine for the brain, from clinical development to clinical care. For Life Sciences partners, we offer the leading at-home EEG platform for clinical development of novel therapeutics for neurological, psychiatric, and sleep disorders. Our Diagnostics business is building the most comprehensive at-home platform for precision diagnostics, combining EEG and cardiopulmonary signals to deliver reimbursable assessments for sleep and central nervous system disorders. 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. Beacon's robust asynchronous work practices ensure a first-class remote work experience. For this position we will consider candidates based anywhere in the US Eastern time zone.

Responsibilities

Lead development of 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 the Devices team on firmware interfaces, GATT profiles, and device behavior; Expose device capabilities to 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 the mobile platform; Improve BLE pairing and reconnection reliability across iOS and Android; Increase streaming robustness for EEG data, including recovery from dropped connections and backgrounding; Build device-side support for a new in-app feature that validates EEG signal quality before data capture; Add diagnostics that help the Clinical Operations team troubleshoot device issues in the field

Requirements

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

Nice to have

Built production React Native apps, or written native modules for React Native or Expo; Worked with TypeScript and the 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

Benefits

Equity; PTO; other benefits; first-class remote work experience; in-person office hubs in Boston and New York