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# Embedded Firmware Engineer

- **Company:** Simbex LLC
- **Location:** Lebanon, NH, United States
- **Experience:** Experienced
- **Salary:** $120,000.0 - $140,000.0
- **Contract:** Permanent contract
- **Skills:** Board Bringup, ARM Architecture, Microsoft Azure, Bluetooth Low Energy (Bluetooth), C++ (Programming Language), Software Quality, Communications Protocols, Computer Programming, Computer Engineering, Continuous Integration, Software Debugging, Embedded Software, Firmware, Hardware Design, Message Queuing Telemetry Transport (MQTT), Real-Time Operating Systems, Sensor Fusion, Signal Processing, Systems Integration, Universal Asynchronous Receiver/Transmitter, USB, Serial Peripheral Interface, Peripherals, System-level Testing, Wireless Technologies
- **Published:** July 9, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=8234ef69be90b14e

## About the Role

* BS in Computer Engineering, Electrical Engineering, Embedded Systems, or related field
 * 3-6 years of embedded firmware development experience
 * Strong C/C++ programming skills
 * Experience developing firmware for ARM Cortex-M microcontrollers
 * Experience with an RTOS (Zephyr preferred)
 * Experience with SPI, I2C, UART, USB, GPIO, and embedded peripherals
 * Experience with Bluetooth Low Energy (BLE)
 * Strong debugging and problem-solving skills

Preferred Qualifications

 * Experience with Zephyr RTOS
 * Experience with MCUboot or OTA firmware updates
 * Experience integrating IMUs or other motion sensors
 * Familiarity with sensor fusion or embedded signal processing
 * Experience with AWS IoT Core, Azure IoT Hub, or similar cloud platforms
 * Experience developing battery-powered or wearable IoT devices

## Description

Simbex is seeking an Embedded Firmware Engineer to develop production firmware for next-generation IoT wearable devices. In this role, you will build embedded software for low-power connected systems, integrate sensors and wireless technologies, and collaborate closely with electrical engineers to bring new hardware platforms to life. You'll play a key role in delivering reliable, high-performance firmware for innovative wearable products., Firmware Development

 * Design, develop, and maintain embedded firmware using C/C++
 * Develop firmware for ARM Cortex-M microcontrollers using an RTOS (Zephyr preferred)
 * Implement drivers and interfaces for peripherals including SPI, I2C, UART,
 * USB, and GPIO
 * Support board bring-up and hardware integration activities

Wireless & IoT

 * Develop Bluetooth Low Energy (BLE) applications for device communication and configuration
 * Implement over-the-air (OTA) firmware update capabilities
 * Support cloud connectivity using IoT communication protocols such as MQTT or CoAP
 * Optimize firmware for low-power operation

Sensor Integration

 * Integrate IMUs and other embedded sensors into production firmware
 * Support sensor fusion and motion-processing algorithms
 * Collaborate with algorithm developers to implement and optimize embedded solutions

Testing & Quality

 * Develop and execute unit, integration, and system-level tests
 * Troubleshoot firmware and hardware integration issues
 * Contribute to CI/CD workflows and software quality practices
 * Maintain technical documentation and support product verification activities


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