Senior Firmware Engineer

ABOUT THE ROLE Join the core hardware team of a Y Combinator–backed consumer wearable startup as a Senior Firmware Engineer, helping build the firmware powering a next-generation wearable platform. You'll play a foundational role in defining the firmware architecture and taking a category-defining device from prototype all the way through to mass production. This role sits at the intersection of low-power embedded design, sensor integration, and production engineering — and it matters because the reliability and battery life of the product depend on the work you'll own. You'll be working in-person in New York City alongside a small, fast-moving engineering team. WHAT YOU'LL DO - Architect and develop embedded firmware for battery-powered wearable devices. - Own core systems for low-power wireless connectivity, sensor processing, and data pipelines. - Design and optimize Bluetooth Low Energy (BLE) connectivity for ultra-low-power operation. - Build robust power management systems to max