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# Embedded Firmware Engineer - Hybrid, STM32 & CAN

- **Company:** ERNI
- **Location:** Spain
- **Contract:** Permanent contract
- **Skills:** ARM Architecture, C++ (Programming Language), Embedded Software, Firmware, Modbus, Universal Asynchronous Receiver/Transmitter, Serial Peripheral Interface, Bare Metal
- **Published:** November 1, 2026
- **Apply:** https://www.jobleads.com/es/job/embedded-firmware-engineer-hybrid-stm32-can--valencia--ecca51abca77d2ef4b10b37f721871c9a

## About the Role

You'll read schematics, use test equipment, and contribute to hardware/software decisions. The role requires at least 3 years of embedded firmware experience and English fluency; German is a plus.

## Description

ERNI is seeking an Embedded Firmware Engineer in Valencia to design, develop, and maintain bare-metal firmware for ARM Cortex-M devices. You will work mainly with C/C++ on STM32 or equivalent MCUs, implementing CAN, Modbus, UART, I2C, and SPI interfaces while collaborating with electronics designers.

You'll read schematics, use test equipment, and contribute to hardware/software decisions. The role requires at least 3 years of embedded firmware experience and English fluency; German is a plus.