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About the Role

Somewear is seeking a Firmware Engineer to develop software for off-grid communication systems, integrating custom hardware, satellite modems, LTE, Bluetooth, mesh networking, and sensors. This role involves creating software for life-saving missions in demanding environments.

Responsibilities

• Write production-quality embedded software in C, C++, and Rust targeting Zephyr RTOS on resource-constrained hardware.
• Own features end-to-end, from technical design through implementation, validation, and field deployment.
• Implement and maintain device drivers for peripherals including GPS/GNSS, cellular modems, satellite transceivers, IMUs, and power management ICs.
• Support board bring-up and hardware validation alongside electrical engineers, including schematic review and signal integrity debugging.
• Develop and maintain communication protocol stacks across satellite, LTE, Bluetooth, and mesh radio links.
• Optimize firmware for power consumption, memory footprint, and real-time performance in battery-operated, thermally constrained deployments.
• Build and maintain CI/CD pipelines, automated test frameworks, and hardware-in-the-loop (HIL) test infrastructure.
• Contribute to secure boot, OTA update mechanisms, and firmware integrity validation.
• Collaborate closely with mobile engineers to evolve application-layer protocols and data synchronization strategies.
• Participate in code reviews, establish engineering standards, and help define best practices for the embedded team.

Requirements

• 5+ years of professional firmware development on constrained embedded systems (ARM Cortex-M series or equivalent).
• Proficiency in C and C++; familiarity with Rust or motivation to learn it.
• Hands-on experience with RTOS environments (Zephyr, FreeRTOS, ThreadX, or similar).
• Strong working knowledge of serial communication protocols: UART, SPI, I²C, USB.
• Experience with wireless protocols — Bluetooth LE, 802.15.4/Zigbee/Thread, or proprietary mesh.
• Comfort debugging at the hardware level using oscilloscopes, logic analyzers, JTAG/SWD debuggers, and power analyzers.
• A genuine passion for reliability and safety in mission-critical systems.

Skills

• C
• C++
• Rust
• Zephyr RTOS
• Embedded Systems
• ARM Cortex-M
• RTOS
• UART
• SPI
• I²C
• USB
• Bluetooth LE
• 802.15.4
• Zigbee
• Thread
• Mesh Networking
• Oscilloscopes
• Logic Analyzers
• JTAG/SWD Debuggers
• Power Analyzers
• Satellite Communication Modems
• Cellular Modem Integration
• GNSS/GPS
• Secure Boot
• OTA Updates
• HIL Testing
• pytest

Location

• San Francisco
• Chicago

Work Type

• Full-time

Experience Level

• Senior

Benefits

• Competitive and equitable compensation plan
• Full-time, salaried with equity
• Health, dental, and vision benefits
• Focus Days: No meetings every Monday
• Unlimited PTO
• Flexible parental leave

About the Company

• Somewear's software platform and satellite-powered hardware enable commercial and government teams to maintain situational awareness during high-pressure operations — in any environment.
• Somewear serves a wide range of customers including helicopter paramedics, backcountry explorers, wildland firefighters, and operators within the US Department of Defense.
• Our purpose is to build best-in-class solutions that keep people in touch, informed, and safe anywhere in the world.

Equal Opportunity

• U.S. Persons ONLY. Please only apply if you meet this requirement.