Nocturnal Inc. · 7 hours ago
Embedded Systems/Firmware Engineer
Cambridge, MA
Full-time
Onsite
Mid, Senior Level
4+ years expNocturnal Inc. is a cutting-edge sleep technology company developing innovative solutions that leverage scientific understanding of sleep mechanisms to enhance sleep, learning and cognitive performance. They are seeking an Embedded Systems/Firmware Engineer to own the hardware–firmware stack end-to-end, focusing on circuit design, sensor integration, and low-power firmware development for wearable electronics.
Computer Software
Responsibilities
Design and review schematics and PCB layouts for wearable electronics
Select and integrate sensors (IMU, PPG, temperature, etc.)
Develop robust, low-power firmware for nRF and/or STM MCUs
Implement power management strategies (sleep states, battery optimization, energy profiling)
Write clean, maintainable, well-documented embedded C/C++ code
Bring up boards, debug hardware/firmware issues, and run validation tests
Optimize BLE communication for performance and power
Collaborate on device UX, haptics, indicators, and user interaction flows
Support manufacturing readiness (DFM, testing procedures, revisions)
Qualification
Required
4+ years of experience in embedded systems development
Strong experience with nRF (Nordic) and/or STM32 platforms
Proficiency in embedded C/C++
Solid understanding of low-power design for battery-powered devices
Experience with BLE and wireless communication
Ability to design, test, and debug custom PCBs
Comfortable using oscilloscopes, logic analyzers, JTAG/SWD debuggers
Experience taking hardware from prototype to production
Preferred
Experience with wearables, medical, or sleep tech devices
Knowledge of Zephyr RTOS, FreeRTOS, or similar
Sensor fusion or signal processing experience
Familiarity with power profiling tools (Nordic Power Profiler, etc.)
UX-driven embedded behavior (state machines, haptics, LEDs)
Manufacturing, certification, or regulatory exposure (FCC, CE)
Benefits
Benefits
Equity (for full-time)
Company
Nocturnal Inc.
Nocturnal is developing active sleep interventions using wearable neurotechnology.
2-10 employees
H1B Sponsorship
Nocturnal Inc. has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
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Distribution of Different Job Fields Receiving Sponsorship
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Trends of Total Sponsorships
2025 (1)
Funding
Current Stage
Early StageCompany data provided by crunchbase