Mobile & Embedded Systems Portfolio — William Wallace

Senior native mobile engineer with embedded firmware roots. Specializing in high-consequence Bluetooth (BLE) hardware integrations, medical device software (IEC 62304 / ISO 14971), and real-time sensor telemetry.

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Featured Regulated & Hardware Projects

MyCite — Otsuka Pharmaceutical

• What it is: Digital medicine system pairing an ingestible pill sensor and wearable patch to track adherence.
• My Role: Built the BLE communication layer interfacing with the wearable sensor patch; implemented local data ingestion and session adherence pipelines.
• Stack: Swift CoreBluetooth (BLE) Unit Testing CI/CD REST APIs

Shadow Drive Connect — Vonnen

• What it is: Companion app for an aftermarket hybrid powertrain upgrade (150 hp electric motor) on Porsche 911s.
• My Role: Sole mobile engineer. Integrated the Bluetooth interface communicating with the vehicle's Engine Management Unit (EMU) for real-time telemetry, mode switching, and diagnostics.
• Stack: Swift CoreBluetooth Embedded C Real-Time Telemetry MVC

Floodlight MS — Roche

• What it is: Clinically validated digital health app capturing sensorimotor data for multiple sclerosis research.
• My Role: Built sensor-based active test interfaces and patient flows with comprehensive unit/UI test coverage.
• Stack: Swift SwiftUI UIKit Sensor Data Unit & UI Tests

Exo Iris — Exo Imaging

• What it is: Healthcare app for the Exo Iris handheld ultrasound system, an FDA 510(k)-cleared device with FDA-cleared AI indicators (e.g., cardiac ejection fraction, lung findings, bladder volume).
• My Role: Integrated the ultrasound device with the iOS app over MFi USB.
• Stack: MFi USB Medical Imaging Hardware Integration

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Commercial & Consumer Applications

Product	Client / Domain	Core Focus	Details
Vitality Today	Health & Wellness	Wellness rewards & HealthKit activity sync	View Project
Navify Pass & Pro	Roche	Health credential management & clinical provider entry	View Project
Toby's T1D Tale	Insulet	Pediatric diabetes education & insulin therapy UX	View Project
Kum & Go	Retail & Fueling	Contactless fueling, mobile payment, loyalty engine	View Project
Wheels Up	Private Aviation	Flight search, booking logistics, member sharing	View Project
WeightWatchers	Health & Wellness	High-volume nutrition logging & offline persistence	View Project
Blue Cross Mobile	Health Insurance	Secure claims management & digital benefits	View Project
The Weather Channel	Meteorology	Real-time radar mapping & location alert triggers	View Project
The Boston Globe	Digital Publishing	Content delivery, subscription paywalls, offline caching	View Project