Embedded Systems​/Firmware Engineer

Nocturnal Inc. is building next-generationsleep technologieswhich augments human health, performance and well-being.

We’re looking for an engineer who canown the hardware–firmware stack end-to-end: from circuit design and sensor integration to low-power firmware, testing, and UX-aware embedded behavior.

This is a hands-on role with real ownership and impact.

• 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
  32 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)

• 4+ years of experience in embedded systems development
• Strong experience with nRF (Nordic) and/or STM
  32 platforms
• Proficiency in embedded C/C++
• 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

• 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)

• Work on a cutting-edge sleep wearable with real user impact
• High ownership and technical autonomy
• Competitive salary / contract rate + benefits + equity (for full-time)
• Opportunity to shape both the product and engineering culture

We're a cutting-edge sleep technology company developing innovative solutions that leverage scientific understanding of sleep mechanisms to enhance sleep, learning and cognitive performance. Our team consists of dedicated technologists and engineers pushing the boundaries of sleep science application.

Please include why you're excited about sleep technology and engineering in your application.