Senior Firmware Engineer

About the Role

This is a senior embedded firmware role on the core hardware team of an early-stage wearable AI startup, where you'll architect and ship the firmware powering a next-generation biometric wearable device. You'll work hands-on from prototype through mass production, playing a foundational role in defining how the platform is built and how it performs in the real world. The work sits at the intersection of low-power embedded design, sensor integration, and production engineering — shipping a category-defining consumer product that matters to users.

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 real-time data pipelines.

• Design and optimize Bluetooth Low Energy (BLE) connectivity for ultra-low-power operation.

• Build robust power management systems to maximize battery life.

• Develop multi-core embedded data pipelines for real-time sensor acquisition and processing.

• Integrate biometric and environmental sensors via SPI, I2C, UART, GPIO, DMA, and interrupts.

• Optimize firmware performance, memory usage, latency, and reliability.

• Lead board bring-up, debugging, validation, and manufacturing support.

• Collaborate with hardware, algorithms, product, and industrial design teams across the full product lifecycle.

• Establish firmware best practices, testing, and CI workflows for the team.

What We're Looking For

• 6+ years of embedded firmware engineering experience, with a track record of shipping battery-powered wearable or consumer electronics devices to production.

• Deep expertise in Bluetooth Low Energy (BLE) systems and low-power embedded architectures.

• Strong proficiency in Embedded C/C++ and RTOS-based systems (e.g., FreeRTOS, Zephyr).

• Hands-on experience with ARM Cortex-M microcontrollers and modern debugging tools.

• Experience with multi-core embedded data pipelines and always-on power optimization.

• Sensor integration experience using SPI, I2C, UART, GPIO, DMA, and interrupt-driven designs.

• Familiarity with secure bootloaders, OTA firmware updates, wireless certification, and production firmware.

• Background in sensor fusion, signal processing, or biometric sensing is a strong plus.

• Experience with platforms such as Nordic, Qualcomm, Ambiq, or STMicroelectronics is a plus.

• Comfortable working in person with a small, fast-moving engineering team.

Location

This role is on-site in New York, NY. Visa sponsorship is not available.