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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Embedded Systems Engineer - **Company:** Simbex LLC - **Location:** Lebanon, NH, United States - **Experience:** Expert - **Salary:** $140,000.0 - $160,000.0 - **Contract:** Permanent contract - **Skills:** Board Bringup, ARM Architecture, Microsoft Azure, C++ (Programming Language), Cloud Computing, Computer Engineering, Software Debugging, Device Drivers, Datagram Transport Layer Security, Embedded Software, Firmware, Hardware Design, Python (Programming Language), Kinematics, MATLAB, Message Queuing Telemetry Transport (MQTT), Multiprocessing, Real-Time Operating Systems, Schematic Capture, Sensor Fusion, Signal Processing, Signal Integrity, System Integration Testing, Universal Asynchronous Receiver/Transmitter, USB, Serial Peripheral Interface, PIC Microcontroller, Test Scripts, State Machines, Hardware Testing, Event Driven Architecture, Bare Metal, Pcb Layout, Aws Iot, Predix - **Published:** June 12, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=5291eaf39c65d735 ## About the Role Do you have experience in Universal asynchronous receiver-transmitter (UART) protocol?, * BS or MS in Electrical Engineering, Computer Engineering, Embedded Systems, or related field * 7+ years of embedded development experience, including 3+ years on production-shipped products * Hands-on EE skills: independently read schematics, perform board bring-up, and debug hardware/firmware interaction * Proficiency with bench instrumentation (oscilloscope, logic analyzer, power analyzer) for power characterization and debug * Experience selecting microcontrollers, RF SoCs, and sensor ICs (IMU, accelerometer, gyroscope) for product designs * Strong C/C++ in bare-metal and RTOS-based embedded contexts * Demonstrated Zephyr RTOS experience: devicetree, Kconfig, module system, and west toolchain * Experience with ARM Cortex-M SoCs (Nordic nRF52/nRF53, STM32, or similar) and peripherals: SPI, I2C, UART, USB * BLE firmware experience and familiarity with OTA update workflows (MCUboot preferred) Preferred Qualifications: * Sensor fusion algorithm experience (Madgwick, Mahony) and algorithm porting from MATLAB/Python * Exposure to sports biomechanics, head impact research, or wearable athletic sensing * Cloud IoT platform experience (AWS IoT Core, Azure IoT Hub) and embedded security (TLS/DTLS, secure elements) * Multi-core SoC development (e.g., nRF5340) or experience in a regulated/safety-critical product environment ## Description Electrical Engineering & Hardware Development * Own hardware design from component selection and schematic capture through PCB layout review and design-for-manufacture * Lead board bring-up: power sequencing, peripheral initialization, signal integrity verification, and fault isolation * Design and characterize low-power analog front-ends and power management subsystems for battery-operated wearables * Develop hardware test fixtures and produce electrical characterization reports Firmware Architecture & Development * Architect and deliver production Zephyr RTOS firmware on ARM Cortex-M/R targets * Author device drivers, BSPs, and devicetree overlays; implement sensor acquisition pipelines for IMU-based impact detection * Design low-power state machines and event-driven architectures for wearable operation * Set firmware coding standards, CI/CD pipelines, and architecture guidelines for the team IoT & Wireless Connectivity * Implement BLE stacks for real-time telemetry and configuration; design OTA update mechanisms via MCUboot * Integrate cloud connectivity (MQTT/CoAP) and evaluate edge vs. cloud trade-offs for impact detection Signal Processing & Algorithm Integration * Port impact detection algorithms from MATLAB or Python into constrained C/C++ firmware * Apply sensor fusion (Madgwick, Mahony, complementary filter) for accurate head kinematics from multi-axis IMU data * Optimize DSP routines for speed and memory footprint on resource-constrained targets Testing & Quality * Define and execute unit, HIL, and system integration test plans; build automated regression frameworks * Maintain design documentation, traceability matrices, and test reports; 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