MCU Embedded Software Engineer

Embedded Software Engineer Mid-level (L4 equivalent) 2-5 years

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The job description

Tech stack. C, ARM Cortex-M0+/M4/M7, STM32/NXP/Renesas families, HAL/LL drivers, FreeRTOS, low-power modes, ADC/DAC/timers, CAN/LIN

About the role

You will join an appliance manufacturer building the microcontroller firmware inside ovens, washers, and HVAC controls shipped by the millions. The MCU team owns the 8-bit-to-32-bit firmware that reads sensors, drives actuators, and keeps appliances safe for a decade of daily use. This role matters because appliance firmware must be boring in the best sense: it runs for years without updates, survives brownouts and noise, and never does anything surprising.

What you will achieve

Ship MCU firmware for two appliance control boards from first prototype through UL certification and mass production, with zero certification findings on firmware, and all certification evidence delivered on schedule
Drive field failure rates below 50 PPM by hardening brownout handling, EEPROM wear leveling, and watchdog strategies, measured across the first million units, with monthly quality reviews tracking the trend
Reduce standby power below 0.5 W to meet the next round of energy regulations, verified by third-party test lab measurement on production units
Build a sensor and actuator driver set (temperature, humidity, motor, relay, display) reused across three product families, cutting new-product firmware effort by a third, as measured in engineering hours per new SKU
Own the factory calibration and end-of-line test firmware that keeps production yield above 99.5% and flags process drift before it becomes scrap

What you will bring

Must-haves

2-5 years writing production firmware for specific MCU families such as STM32, NXP Kinetis/LPC, Renesas RA/RX, or Microchip
Strong C with register-level and HAL-level fluency, and the judgment to know when each is appropriate
Experience with the peripheral mix of appliance control: ADC sampling, PWM, timers, capacitive touch, and segment or TFT displays
Low-power design experience: sleep modes, wake sources, and current budgets verified by measurement
Familiarity with motor control basics such as BLDC or induction control, or heater/relay control loops
Robustness instincts: debouncing, filtering, fault detection, and safe-state behavior designed in from the start
Experience supporting manufacturing: calibration flows, test fixtures, and yield analysis with the factory team

Nice-to-haves

Experience with functional safety concepts for appliances such as UL 60730 Class B
Knowledge of LIN or other cost-optimized in-product networks
Familiarity with EMC-hardened firmware practices for noisy appliance environments