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AI Summary
HLTH is hiring its first in-house Firmware Engineer to develop embedded firmware for next-generation connected wearable devices. The role involves designing, developing, testing, and maintaining firmware in C on Zephyr/nRF Connect SDK, building sensor drivers, optimizing power and performance, and managing secure OTA updates across tens of thousands of fielded devices. Candidates need 4+ years of embedded firmware experience shipping on battery-powered wearables, strong C/ARM Cortex-M skills, hands-on Nordic nRF/Zephyr experience, and shipped secure OTA/DFU updates.
Key Highlights
First in-house Firmware Engineer role at HLTH, a fast-growing Shopify ecosystem brand
Design, develop, and maintain embedded firmware in C on Zephyr/nRF Connect SDK for wearable devices
Build sensor drivers, optimize power/performance, and manage secure OTA updates across tens of thousands of deployed devices
Work hands-on with founders, BLE engineer, biosignal engineer, factories, and external vendors
Requires 4+ years embedded firmware experience with shipped wearable/sensor devices and secure OTA/DFU
Key Responsibilities
Design, develop, test, and maintain embedded firmware in C on Zephyr / nRF Connect SDK
Develop and integrate drivers for PPG, 6-axis motion, and skin temperature sensors
Build reliable sensor acquisition, buffering, and on-device storage pipelines
Optimize power consumption, memory usage, and overall system performance
Build and maintain secure OTA firmware updates with signed images and rollback
Support firmware bring-up, debugging, validation, and production readiness remotely with factory
Develop error handling, watchdog, crash logging, and recovery mechanisms
Participate in firmware architecture, design, and code reviews
Write unit, integration, and hardware-level tests and develop test tools and automation scripts
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Technical Skills Required
Benefits & Perks
Fully remote, flexible hours
Access to custom AI tooling and workflows
Flat team, direct access to founders
Unlimited PTO (with a required recharge time)
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Nice to Have
Experience with Goodix or similar PPG sensor front ends and high-rate sensor data acquisition
Working knowledge of BLE profiles and wearable communication architectures
Experience building test tools and automated testing for firmware releases
Python scripting for firmware test tools and exposure to firmware CI/CD pipelines
C++ programming experience
Job Description
About HLTH
HLTH is one of the fastest growing brands of 2026, reaching the top 0.1% in hyper-growth of all stores in the Shopify ecosystem and we're just getting started (literally). At HLTH we believe understanding your health should be effortless. Our products turn health monitoring into clear insights anyone can act on.
The Role
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