Remote Senior Firmware Engineer – Embedded IoT & Security

ButterflyMX

Irvine (CA)

On-site

USD 150,000 - 190,000

Full time

7 days ago

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Benefits offered by this job

Medical, Dental & Vision

401(k) matching

Paid time off

Life Insurance

Disability Insurance

Family leave

Self-care stipends

Commuter benefits

Job summary

ButterflyMX in the United States is seeking a hands-on Firmware Engineer to design, build, debug, secure, and optimize embedded software powering our access control, intercom, IoT, and connected hardware.

You will work close to hardware, with bare-metal microcontrollers, RTOS/Zephyr, and embedded Linux, writing production-grade C/C++, and collaborating across hardware, firmware, and security teams to deliver robust, scalable devices.

Qualifications

5+ years of hands-on embedded firmware development experience.
Strong C/C++ production code for resource-constrained embedded systems.
Experience with bare-metal and RTOS/Zephyr and embedded Linux.
Deep knowledge of microcontroller architecture and peripherals.
Ability to read schematics and collaborate with hardware engineers.

Responsibilities

Develop production-ready embedded firmware across MCU platforms.
Design, write, debug, and maintain firmware for bare-metal, RTOS/Zephyr, and embedded Linux.
Build low-level firmware for peripherals, sensors, and power systems.
Implement secure boot, OTA updates, and device identity mechanisms.
Collaborate across hardware, firmware, security, and cloud teams to improve reliability.